Mathematics: What is the value of a in the equation , when ? 3 15 21 39

What is the value of a in the equation , when

ggdvj9gggsc

06.01.2022

The value of a is 15

Step-by-step explanation:

Given the equation

5a-10b=45

we have to find the value of a when b is 3

5a-10b=45

Substitute b=3, we get

5a-10(3)=45

5a-30=45

5a=45+30=75

$a=\frac{75}{5}=15$

Hence, the value of a is 15

0,0(0 оценок)

aliami0306oyaj0n

26.04.2020

ANSWER:

The 75% of 400 is 300.

SOLUTION:

Given, 75% of 400.

We have to Write and evaluate an expression to find the answer. Then we have explain how to use the model to justify the answer.

Now, let x and y be any two numbers such that, 0 ≤ y ≤ 100

$\text { Then, } y \% \text { of } x \text { will be equal to } \frac{y}{100} \times x$

Now, let us substitute the given values in above expression.

$x=400 \text { and } y=75 \rightarrow \frac{75}{100} \times 400=75 \times 4=300$

We have to do the same procedure for any given values.

Hence, the 75% of 400 is 300.

0,0(0 оценок)