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2 years ago

Solve Linear Equations with Rational Numbers

Mathematics

1 answer:

german2 years ago

5 0

Answer:

3/2

1x = 12

Step-by-step explanation:

See attachment

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13 please I have no idea what the steps for this is

Ilya [14]

Answer:

UV=142

Step-by-step explanation:

21x-13=10x+31

+13 +13

21x=10x+44

-10x=-10x

11x=44

÷11 ÷11

x=4

now substitute 4 in place of x (only have to solve one)

21(4)-13= 71

now multiply your answer by 2

71×2=142

6 0

3 years ago

For five mathematics tests, your scores were 81, 86, 81, 76, 71. what was your average score?

trasher [3.6K]

add them together then divide by 5

81 +86 +81 +76 +71 = 395

395/5 = 79

your average was 79

7 0

3 years ago

Use radical notation to rewrite each expression and simplify<br> 9 3/2

scoundrel [369]

Answer:

$9^{\frac{3}{2}}=\sqrt{9^3}=27$

Step-by-step explanation:

The fractional exponent m/n is often translated to radical form as ...

$x^{\frac{m}{n}}=\sqrt[n]{x^m}$

In this case, I find it easier to evaluate as ...

$x^{\frac{m}{n}}=(\sqrt[n]{x})^m=\boxed{(\sqrt{9})^3=3^3=27}$

7 0

3 years ago

Gravitational force acts on all object in proportion to their masses. Why then, a heavy object does not fall faster than a light

nordsb [41]

Because force= acceleration x mass Acceleration is constant for a body of any mass since force is exactly proportional to mass.

7 0

2 years ago

Read 2 more answers

At an university 70% of the students who attend stay on campus. If 1,380 of the students who attend live off campus, what is the

Alborosie

Answer:

4600

Step-by-step explanation:

We can write a proportion to find the total amount who attend university using the information given. A proportion is two equivalent ratios set equal to each other. Since 70% live on campus, then 30% live off campus and we are told that number is 1,380.

$\frac{30}{100}=\frac{1380}{y}$

We will cross multiply the numerator of one ratio with denominator of the other. And then solve for y.

30y=100(1380)

30y=138000

y=4600.

There are 4600 students who attend the university.

7 0

2 years ago