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Ostrovityanka [42]

3 years ago

9

Two thirds of a number is equal to 20 what is the number

1 answer:

goldenfox [79]3 years ago

4 0

To solve this problem, we should set up an equation, letting the unknown number be represented by the variable x.

2/3x = 20

To solve this equation, we just have to divide both sides of it by 2/3, because we are trying to get the variable alone on the left side of the equation.

x = 30

Therefore, the number is 30.

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Solve for x: z=m-x *

astraxan [27]

Answer:

x = m - z

Step-by-step explanation:

z = m - x

Add x to both sides.

x + z = m

Subtract z from both sides.

x = m - z

8 0

3 years ago

Eliminating by multiplying <br> X+3y=1<br> -5x+4y=-24

gavmur [86]

Answer:

y = -1 x = 4

Step-by-step explanation:

(X+3y=1) 5 Multiply this equation by 5 to cancel out the x

-5x+4y=-24

-5x + 4y= -24

+ 5x + 15y = 5 Add both equations together

19y = -19 Divide both sides by 19

y = -1

Plug -1 for y into one of the equations

x + 3(-1) = 1 Multiply 3(-1)

x - 3 = 1

+ 3 + 3 Add 3 to both sides

x = 4

If this answer is correct, please make me Brainliest!

3 0

3 years ago

A store has a sale on paper cups, 200 cups for $15.00. During the sale, what is the unit price per cup?

Anna35 [415]

Answer:

it's either 200:15 or 20:15 or 15:20

Step-by-step explanation:

6 0

3 years ago

I’m unsure how to solve this... help?

dem82 [27]

Time taken is equal to distance divided by speed
So time is 50/5 = 10 seconds

5 0

3 years ago

Read 2 more answers

Evaluate each of the following to three significant figures, and express each answer in SI units using an appropriate prefix: (a

Softa [21]

Answer:

a). $4.86\times 10^{-15}$ m

b). $4.21\times 10^{-2}$ m³

c). $7.00\times 10^{3}$ N²

Step-by-step explanation:

In this question we have to convert each option into SI units.

a). $4.86(10^{-6})^{2}$ mm

= $4.86\times (10^{-12})\times (10^{-3} )$ m

= $4.86\times 10^{-15}$ m

b). (348 mm)³

= $(348)^{3}\times (10^{-3})^{3}$ m³

= $42144192\times 10^{-9}$ m³

= $4.21\times 10^{-2}$ m³

c). $(83700)^{2}\times (10^{-3})^{2}$ N²

= $700569\times 10^{4}\times 10^{-6}$ N²

= $7.00\times 10^{9}\times 10^{-6}N^{2}$

= $7.00\times 10^{3}$ N²

7 0

3 years ago