Please help me I don’t understand how to do it. If you can please use a data table to explain how to do it.

Please Help Me I Dont Understand How To Do It. If You Can Please Use A Data Table To Explain How To Do

Answers

Answer 1

Answer:

The 70% mixture makes up 0.7 liters of the solution whereas the 60% mixture makes up 2.8 liters of the solution.

Step-by-step explanation:

Let us have x liters of the .7 mixture and y liters of the .6 mixture.

We want total liters to be 3.5 which means we need x+y=3.5 . I don't like the decimal in the equation so I'm going to multiply both sides by 10: 10x+10y=35

We also need the .7x+.6y=.62(3.5) . I hate the decimal business going on in this question so I'm going to multiply by 1000 which gives 700x+600y=62(35) .

So we have the system

700x+600y=62(35)

10x+10y=35

I'm going to setup this up for linear combination/elimination.

Multiply bottom equation by 60.

700x+600y=62(35)

600x+600y=60(35)

Subtract equations (bottom from top):

(700-600)x+(600-600)y=35(62-60)

Simplify:

100x+0y=35(2)

100x=70

Divide both sides by 100:

x=70/100

x=7/10

Going back to x+y=3.5 along with x=7/10 or .7 liters to find y.

y=3.5-x with x=.7

y=3.5-0.7

y=2.8

The 70% mixture makes up 0.7 liters of the solution whereas the 60% mixture makes up 2.8 liters of the solution.

Pic added.

Another way to do problem:

.7x+.6(3.5-x)=.62(3.5)

Multiply and distribute:

.7x+2.1-.6x=2.17

Combine like terms on left:

.1x+2.1=2.17

Subtract 2.1 on both sides:

.1x=.07

Multiply both sides by 10:

x=0.7 liters

Now the other acid solution is 3.5-0.7 which is 2.8 litera.

Please Help Me I Dont Understand How To Do It. If You Can Please Use A Data Table To Explain How To Do

Related Questions

Can someone help me with an idea please? I need something like this for math and science week but i think my idea is really lame. It has to be a photograph and it can be physics, chemistry or math! Pls lmk your ideas cuz im running out of them

Answers

Answer:

take a light bulb and a potato and some wires connect together will give light

Answer:

i have attached a pic of an idea that might help you

:)

Which of the following functions is even?

Answers

Answer: Choice C

[tex]f(x) = -3x^2 + 4[/tex]

================================================

Explanation:

If all the exponents are even, then the polynomial function is even.

Choice A has a mix of even and odd exponents here, so choice A is neither even nor odd. We can rule this out.Choice B is the same story as choice A. So we can rule that out as well.Choice C has all of its exponents even. Therefore function C is an even function, and it's the final answer.Choice D is the same story as choice A. The only difference is the leading coefficient is positive.

What is the base and exponent of x^5

Answers

Answer:

The base is x and the exponent is 5.

Step-by-step explanation:

Hi there!

[tex]x^5[/tex]

The base is x and the exponent is 5.

x is raised to the exponent of 5.

I hope this helps!

Please help me on this homework assignment, 20 points to whoever can help me and give me a good answer. it is asking for the height and the bottom number under the 90 degree angle is 6.

Answers

Answer:

h = 3 sqrt(21)

or

h = 13.75

Step-by-step explanation:

The perimeter of the rhombus is 60 feet. Like a square, all the sides of a rhombus are equal. Therefore your first step is to find FK which is a side.

FK = 60/4 = 15 feet.

Now you can use the Pythagorean Theorem.

a^2 + b^2 = c^2

a = 6

b = height or = h

c = 15

6^2 + b^2 = 15^2

36 + b^2 = 225

b^2 = 225 - 36

b^2 = 189

sqrt(b^2)= sqrt(189)

b = sqrt(3 * 3 * 3 * 7)  You can take out the square of 3 * 3 and make it 3.

b = 3 * sqrt(3*7)

b = 3 * sqrt(21)

which expression is equal to 72 +63 ?
a. 9(8+7)
b. 8(9+7
c. 7 (10+9)
d. 6 (12+10)​

Answers

Answer:

Your answer is option a.

Answer:

a. 9(8+7)

Step-by-step explanation:

If you distribute the 9 into the equation, You're basically multiplying the 9 by each term so it really becomes:

(9*8) + (9*7)

Which leaves you with:

72 + 63

is statistics mathematics or science? defend your answer.

Answers

Answer:

There are few kind of statistics: first of all - Mathematiсal statistics. This is quite a mathematical science.

Its applications widely used in many branches of science. First of all (for me) in measurement theory. When used correctly, there is no objection to this science and its methods.

The use in the so-called "social sciences", primarily in sociology, raises many questions: first and foremost - how representative is the "sample"? To what extent does the question asked by the respondent dictate the “correct” (expected) answer? And so on. Of course, this is not a statistic, but mostly a science-like hype, covering up the absence of objective methods.

Hope this helps <3

Arrange the decimal numbers from largest to smallest.

Answers

Answer:

0.845, 0.839, 0.748, 0.712, 0.643

Answer:

0.845, 0.839,0.748,0.712,0.643

that's the question ?? ​

Answers

Step-by-step explanation:

Before we answer, the area of a Circle given it radius is

[tex]a = \pi r {}^{2} [/tex]

The area of a circle given it diameter is

[tex]a = \pi( \frac{d}{2} ) {}^{2} [/tex]

So let answers question 1-4.

1. The area is

[tex]1024\pi[/tex]

2. The area is

[tex]576\pi[/tex]

3.

[tex]1.225\pi[/tex]

4.

[tex]309.76\pi[/tex]

For the 5th problem, circumference is

[tex]\pi \times d[/tex]

where d is the diameter and

[tex]2\pi r[/tex]

where r is the radius.

A circumference of 100 m means the radius is 50 because

[tex]2\pi \times r = 100\pi[/tex]

[tex]r = 50[/tex]

So this means the area is

[tex]2500 {\pi}[/tex]

The total cost of a desk and a stool is $86.50.
The stool costs $25.50 less than the desk.
How much does the stool cost?

Answers

Answer:

$30

Step-by-step explanation:

d + s= 86.50----------1

d - 25.50 = s

d - s=25.50------------2

1 - 2

(d-d) +(s-(-s))=86.50-25.50

2s=60

s=60/2=$30

The cost of a stool is $30.5 if the total cost of a desk and a stool is $86.50 and the stool costs $25.50 less than the desk.

What is a linear equation?

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

It is given that:

The total cost of a desk and a stool is $86.50.

The stool costs $25.50 less than the desk.

Let the cost of the desk is $d

Let the cost of the stool is $s

d + s = 86.50
s = d - 25.50

The above two equations represent two linear equations in two variables.

By solving by substitution method:

Plug s = d - 25.50 in the first equation

d + d - 25.50 = 86.50

2d = 86.50 + 25.50

2d = 112

d = 112/2

d = $56

s = 86.50 - 56

s = $30.5

Thus, the cost of a stool is $30.5 if the total cost of a desk and a stool is $86.50 and the stool costs $25.50 less than the desk.

Learn more about the linear equation here:

brainly.com/question/11897796

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Write the decimal as a fraction .014

Answers

Answer:

14/100

Step-by-step explanation:

Hopefully this helps you

pls mark brainlest

14/1000 which reduces to 7/500.

hope this helps !

Mary had $305 in her bank account. She deposited $250.25 more and then withdrew $317.50
from her account. What is the balance now in her account?

Answers

Answer:

$237.75

Step-by-step explanation:

you add $305 & $250.25 together which is equal = $555.25,then subtract $317.50 from it = $237.75

what is the quotient of 81.5 ÷ 1.25?

Answers

Answer:

The answer is 65.2 because you divide 81.5 by 1.25

answer would be 65.2. have a nice day

The range of which function is (2.oo)?
y = 2x
y = 2(5x)
y=5X +2
y = 5x + 2

Answers

Answer: [tex]y = 5^x+2[/tex]

The 2 is not in the exponent.

=====================================================

Explanation:

As x gets smaller and smaller, going off into the negative direction forever, the expression [tex]5^x[/tex] will approach 0. This is because we're computing stuff like 5^(-1) = 1/5 = 0.2 and 5^(-2) = 1/25 = 0.04 and so on. The decimal values are approaching 0 but never actually arrive there. The range of [tex]y = 5^x[/tex] is [tex](0,\infty)[/tex]

Adding on the 2 at the end will shift everything up so that the range is now [tex](2,\infty)[/tex]. Refer to the graph below.

The parenthesis in interval notation mean we do not include that endpoint as part of the set. Saying something like [tex](2,\infty)[/tex] is the same as saying [tex]2 < y <\infty[/tex] when talking about the range.

Given the function: f(x)=−(x−3)2+3. Describe the transformations in the order in which they occur.

Answers

Answer:

First, reflection over the x- axis, then a horizontal translation 3 units to the right and 3 units up.

Step-by-step explanation:

Order does not matter. The - before the (x-3) makes a reflection over the x-axis. Then, the -3 in the (x-3) makes the graph translate 3 units to the right, and the +3 is 3 units up.

Plzzz helppppp!!!!!!!!! 20+PTS and brainliest!!!!!!!!!!

Is the graph in the picture a function or not a function?
Please explain.

Answers

Answer:

THis is a function.

Step-by-step explanation:

If you draw a straight line vertically, it won't intersect more than one point of the line. This is called the vertical line test, and if the line you drew passes the line on the graph more than once, its not a function.

Yw, brainliest, and don't plagiarize, they'll catch you.

it’s a function because it doesn’t go over the vertical line test

A rectangle has a length of 29 yards less than 9 times it’s width. If the area of the rectangle is 9418 square yards, find the length of the rectangle

Answers

Answer:

Step-by-step explanation:

w = w

L = 9*w - 29

Area = L*w

area = 9418

w * (9w - 29) = 9418

9w^2 - 29w - 9418 = 0   This monster factors, believe it or not

(9w + 277)(w - 34) = 0

9w + 277 =0

9w = - 277

w = -30.777778

w - 34 = 0

w = 34

The length = 9w - 29

L = 9*34 - 29

L = 306 - 29

L = 277

Check

Area = L * w

Area = 277 * 34

Area = 9418 just as it should.

4. A sequence is represented below.
{3, 4.5, 6.75, 10.125, 15.1875, ...}
Which representation is a formula for the nth term of the sequence?

Answers

Answer:

Step-by-step explanation:

If you have choices please give then. I'm guessing at what the answer might be.

an = a_n-1 + 1/2 a_n-1

an = 3/2 a_n-1

Let's try it out.

take 3/2 of 6.75       Multiply by 3 first

(3 * 6.75 ) / 2

20.25 / 2

10.125 which is what happens.

Choose the equation of the the ellipse shown in the graph.

Answers

Answer: A

Hello,

Step-by-step explanation:

center =(-3,1)

a=2

b=7

[tex]\dfrac{(x+3)^2}{4} +\dfrac{(y-1)^2}{49} =1\\\\or\\\\49*(x+3)^2+4(y-1)^2=14^2\\\\Answer\ A\\[/tex]

which situation results in -6 as a final value

Answers

Answer:

Example:

0 - 6 = -6

4 - 10 = -6

Select the FALSE statement about the correlation coefficient (r).

a. The value of the correlation coefficient lies between-1 and 1.
b. The sign of the correlation coefficient tells us if the pair of variables is positively or negatively associated.
c. The correlation coefficient r = 0 shows that two variables are strongly correlated.
d. The correlation coefficient quantifies the strength of the linear relationship between two variables.

Answers

Answer:

C.

Step-by-step explanation:

Scatterplots with weak correlation coefficients are values near zero

The false statement about the correlation coefficient is r = 0 shows that two variables are strongly correlated.

What is Correlation?

A statistical metric known as correlation illustrates how closely two variables are connected and how they tend to move in tandem. When two variables are positively correlated, they move in the same direction, and when they are negatively correlated, they move in the opposite way. To determine the degree and direction of the association between two variables, a correlation coefficient is utilized.

A correlation coefficient of -1 indicates a perfect negative correlation, a correlation coefficient of 1 indicates a perfect positive correlation, and a correlation coefficient of 0 indicates no correlation between the two variables.

Given data ,

The FALSE statement is:

c. The correlation coefficient r = 0 shows that two variables are strongly correlated.

A correlation coefficient of 0 means that there is no linear relationship between the two variables. It does not indicate the strength of the relationship.

A value of r = 0 indicates that there is no association between the two variables, whereas a value of r = 1 or r = -1 indicates a perfect positive or negative association, respectively.

To learn more about correlation click :

https://brainly.com/question/28898177

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I look like this: __ . __ __

• My tenths digit is twice my hundredths digit.
•My ones digit is equal to the sum of my tenths and hundredths
digits.
• My hundredths digit is even and greater than zero.

What number am I?

Answers

Answer: 6.42
4 is double 2
6 equals the sum of 4+2
2 is even and greater than zero

Your Gps shows that your friends house is 10.0 km away, as shown in the image below. but there is a big hill between your house and you dont want to bike the directly. You know your friends street is 6.0km north of your street. How far do you have to ride before turning north to get to your friends house?

Answers

Answer:

2.0km

Step-by-step explanation:

If your car gets 34 miles per gallon, how much does it cost to drive 320 miles when gasoline costs $3.40 per gallon?
The cost is $
(Simplify your answer. Round to the nearest cent as needed.)

Answers

Answer:

$31.96

Step-by-step explanation:

To find how many gallons you need, divide 320 by 34.

[tex]\frac{320}{34} =9.4 (rounded-to-the-nearest-cent)[/tex]

So now that we know we need 9.4 gallons, we multiply 9.4 times the price per gallon ($3.40)

9.4 x $3.40 = $31.96

Replace the asterisks in the number 72*3* so that the obtained numbers will be divisible by 45.

Answers

Answer:

72135

Step-by-step explanation:

72135 divided by 45 equals 1603 so it is divisible by 45.

Solve for x: x – 23 = 2

Answers

Answer:

X=25

Step-by-step explanation:

This is because X has to be greater than 23. Because you are taking away 35 and the answer is 2, you have to add 23 and 2, and that gives you 25!

Which explanation uses the number line to show 5 + (-5) =0

Answers

Answer:

+5 is right and - 5 is left

Step-by-step explanation:

I. If 5 + (-5) = 0

  then 5 - 5 = 0

  If 5 is on the right side

   then -5 is on the left side

The government measures economic activity by calculating the

Answers

The Gross Domestic Product measures the value of economic activity within a country. Strictly defined, GDP is the sum of the market values, or prices, of all final goods and services produced in an economy during a period of time.

Hope this helps!

Could use help on this math problem ​

Answers

Answer:

78

90

86

96

09

Step-by-step explanation:

80

90

90

OK LA sir I will complete my work as soon as possible LA thank you la madam My name is now signing off

A hot air balloon went from an elevation of 6,813 feet to an elevation of 3,168 feet in 54 minutes. What was its rate of descent?

Answers

I agree that you are still trying so hard and to not get to see you too lol

Eric spends $30 to buy the
ingredients for 5 batches of trail mix. Find
the cost of the ingredients Eric needs for
one batch. How much would Eric need
for 2 batches

Answers

Answer:

Below

Step-by-step explanation:

$30 to buy the ingredients for 5 batches of trail mix.

If we’re trying to find the cost of one batch of trail mix, divide 30 by 5 which equals 6

He will need $12 for 2 batches
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