Need help with this math question. Will give brainliest

Answer:

-16

Step-by-step explanation:

-k² -(3k-5n)+4n k=-1 , n= -2

= -(-1)² - ( 3(-1) -5(-2) )+4(-2)

= -1-(-3+10)-8

= -1-(7)-8

= -1-7-8

= -16

Answer:

The student did not distribute properly to get A= P+Prt. The equation can be fixed by putting a factor of P in the denominator: r=(A-P)/Pt

Step-by-step explanation:

just did it

There is an error in step 2 where distributive property was not followed.

Simple Interest (S.I.) is the method of calculating the interest amount for a particular principal amount of money at some rate of interest.

Steps taken by the student to solve the formula of the simple interest for the values of '',

Step 1 : A = P( 1 +rt)

Step 2 : A = P + rt

Step 3 : A - p = rt

Step 4 : r = (A - P)/ t

There is an error in step 2 where distributive property was not followed.

Correct steps should be,

Step 1 : A = P( 1 +rt)

Step 2 : A = P + Prt [By distributive property]

Step 3 : A - P = Prt

Step 4 : r = (A-P)/Pt

Therefore, error was made in step 2.

Learn more about simple interest here:

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Answer:

please mark me brainliest

Step-by-step explanation:

if you want to get the total price for the box of balls,you will have to multiply the price per ball with total number of balls

which is 20$×100=200$

Step-by-step explanation:

the first brand = (65-55)/(80-55) x 180

= 10/25 × 180

= 72 gallons

the second brand = (80-65)/(80-55)×180

= 15/25 × 180

= 108 gallons

Answer: Therefore, his son and daughter got Rs 200.

Step-by-step explanation:

6 kg of rice = 75*6 = Rs 450

2 packets of oil = RS 2*125 = RS 250

now total money he spent = Rs 450 + Rs 250 + Rs Rs 3,300

                                             = Rs 700 + Rs 3,300

                                             = Rs 4000

Money left = Rs 4,400-Rs 4000 = Rs 400

so

400/2 = Rs 200

Answer:

(i) ABE = 36 [tex]cm^2[/tex]

   BCDE = 96 [tex]cm^2[/tex]

Step-by-step explanation:

answer for part ( i )

ABE ⇒

base × height × [tex]\frac{1}{2}[/tex] = area of triangle

→ 6 × 12 × [tex]\frac{1}{2}[/tex] =36

BCDE ⇒

length × width = area of rectangle

→ 8 × 12 = 96

Answer:

9

Step-by-step explanation:

The correct conversion is 68°F = 20°C.

Conversion is defined as the conversion from one quantity unit to another quantity unit followed by the process of division, and multiplication by a conversion factor.

We are given that;

To convert 68°F

Now,

To solve the formula for C, we need to isolate C on one side of the equation. We can do this by subtracting 32 from both sides and then dividing by 1.8. The steps are:

F = 1.8C + 32

F - 32 = 1.8C

(F - 32) / 1.8 = C

Therefore, the correct formula for C is:

C = (F - 32) / 1.8

To convert 68°F to degrees Celsius, we can plug in F = 68 into the formula and simplify. The steps are:

C = (68 - 32) / 1.8

C = 36 / 1.8

C = 20

Therefore, after conversion the answer will be 68°F = 20°C.

Learn more about the unit conversion here:

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Answer:

Step-by-step explanation:

To get equivalent expressions, if you are adding or subtracting, the number and letter you get on the left must be the same as the one on the right.

In B. The answer is incorrect because 4t is minus on the left. The letters are different, so 4t must remain minus. Not B

In C the numbers will combine when you add. If they are the same,, they remain the same. They do not become powers the answer for C is 10s. So C is not correct.

In D you are indicating that 6 is multiplied by 4s.  You can only multiply 6 and 4. They don't add. Not D

A is correct.

Answer:

the sum of two positive integer to always be positive

Answer:

555

Step-by-step explanation:

because it is tyeesgghhhhfdfhf

Answer:

See below

Step-by-step explanation:

Quadrilaterals that have two pair of parallel sides and no right angles can be:

1) Rhombus ( 2 pair of parallel sides and no right angles. )

2) Parallelogram ( 2 pair of parallel sides and no right angles. )

Picture 1 shows a rhombus!

Picture 2 shows a parallelogram!

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

Lamar's next step is x^2 — 12x + 6 = 0

The solution to the equation is x = ± 6√30

Step-by-step explanation:

Answer:

Day 1: 100 bacteria

Day 2: 100 + 90% = 190 bacteria

Day 3: 190 + 90% = 361

Day 4: 361 + 90% = 685.9

Day 5: 685.9 + 90% = 1303.21

Answer:

Pantalones = $600.00 × 2

$ 1,200.00

Blusas = $350.00 × 4

$ 1,400.00

Calcetas = $120.00 × 3

$ 360.00

Par de tenis = $950.00 × 2

$ 1,900.00

Total a pagar = $4,850.00

$5,000.00

- $4,860.00

Sobrante = $140.00

Answer:

Step-by-step explanation:

To find value:

2x + 3z

Given values:

x = 4, y = 3 and z = -2

Solution:

2x + 3z

(Putting the values of x = 4 and z = -2)

= 2(4) + 3(-2)

= 8 - 6

= 2 (Ans)

Answer:

2

Step-by-step explanation:

2×4+3×−2

=8+3×−2

=8+−6

=2

x/2-5=20

(x-5*2)/2=20

(x-10)/2=20

x-10=20*2

x-10=40

x=40-10

x=30

Answer:

x/2-5=20

x=20(2-5)

x=40-100

x= -60

Answer:

they spend the time for swimming is 11/4 ✖ 2 =22/4

that's means in hours =5 hours 30 minutes

Answer:

fathers age 50 son age 20

Josh starts with 8/8 (or any other fraction that equals 1) of his allowance. He then spends 3/8 of it.

8/8 x 3/8 = 3/8

8/8 - 3/8 = 5/8

He spend 3/8 of his allowance, leaving him with 5/8 left. Then Josh spent 2/3 of that remaining amount.

5/8 x 2/3 = 10/24 = 5/12

Josh has 5/12 of his allowance left for the rest of the week.

Hope this helps!

Answer:

35,25,20,5

Step-by-step explanation:

X.......Y

-2.....35 ( Assuming he has been spending 5$ a week we can backtrack)

0........25 ( given)

1.........20 ( he has spent 5)

4..........5 ( 5*4=20-25=5)

Hi ;-)

[tex]0,2=\dfrac{2}{10}=\dfrac{2:2}{10:2}=\boxed{\frac{1}{5}}[/tex]

Answer:

1/5

Step-by-step explanation:

Answer: 0.2 when converted into a fraction is 1/5.

Hope it helps:)

Answer:

m = 3.625

Step-by-step explanation:

1.2m + 0.65 = 5

~Subtract 0.65 to both sides

1.2m = 4.35

~Divide 1.2 to both sides

m = 3.625

Best of Luck!

Answer:

[tex] - \frac{9}{10} - ( - \frac{3}{10} ) \\ \\ = - \frac{9}{10} + \frac{3}{10} \\ \\ = \: - \frac{ 6}{10} [/tex]

I hope I helped you^_^

Answer:

-3/5

Step-by-step explanation:

1.) -9/10 - (-3/10)

2.) This___(-9)+3___ (DO NOT SIMPLIFY) over 10 or

(-9)+3 / 10

3.) -3/5

Answer:

Step-by-step explanation:

1+cos 2a=2cos^2a

cos a=√[(1+cos 2a)/2]

[tex]put~a=\frac{\pi }{8} \\2a=\frac{\pi }{4} \\\\cos\frac{\pi }{8} =\sqrt{\frac{1+cos \frac{\pi }{4} }{2} } \\=\sqrt{\frac{1+\frac{\sqrt{2}}{2} }{2} }\\=\frac{\sqrt{2+\sqrt{2}}}{2}[/tex]

Answer:

-38

Step-by-step explanation:

b-8y

(-6)-8(4)

-6-32

-38

Answer:

The answer is B. 4.286

Step-by-step explanation:

2.826+1.46= 4.286

Answer:

[tex]3(y + 2) - 5 = 22 \\ 3(y + 2) = 27 \\ (y + 2) = 9 \\ y = 9 - 2 \\ y = 7[/tex]

Answer: 7

Step-by-step explanation:

3y+6-5=22

3y+1=22

3y=22-1

y=21/3

y=7

Answer:

The answer is A I am pretty sure. Please tell me if I got it wrong.

Step-by-step explanation: