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Rainbow [258]
3 years ago
8

Can someone please help me with the 2 questions below. (they go together)

Mathematics
1 answer:
il63 [147K]3 years ago
6 0

Answer:

r=√(A/π)

r=2.8

Step-by-step explanation:

We want to get (r) alone on one side

A=πr^2

divide each side by π

A/π=r^2

square root each side

√(A/π)=r

r=√(A/π) is the answer to your first question.

now we are given A

r=√((25)/3.14)

put the left side into a calculator

r=2.8216632

round to nearest tenth of a centimeter

r=2.8

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What is 4 over 15 plus negative 7 over 45
IgorLugansk [536]

Answer:

If what I think youre saying is correct, then it should be 1/9

Step-by-step explanation:

4/15 + (-7/45)

Multiply both numerator and denominator of 4/15 by 3 so that the denominator becomes 45 to match the other fraction.

12/45 + (-7/45)

As the fraction on the right side is negative, it is taken away from the left fraction, hence:

(12 - 7)/45

Therefore, with simple subtraction,

5/45

Simplify to 1/9

8 0
2 years ago
What is the value of y:35x+120y=500
Vladimir79 [104]
To get y you can move the x's to one side, so 120y=500-35x
then you can isolate the y, y= 500/120-35x/120

:)
8 0
4 years ago
Does 4/7 and 24/35 form a proportion?
nignag [31]
Well 24=4*6, and 35=7*5 not 6, so 4/7 doesn't = 24/35, so no
6 0
3 years ago
Plzz hel am timed which number is composite
mezya [45]
15 is compostit bevuasw (3x5=15) (1x15)
8 0
3 years ago
Read 2 more answers
An automotive technician has two job offers. Shop A would pay him a straight salary of $900 per week. Shop B would pay him $25 p
JulsSmile [24]

Given,

The salary for the technician from shop A is $900 per week.

The salary for the technician from shop B is $25 per hour.

The equation for the total pay for shop B is,

\text{Total pay= salary of per hour}\times number\text{ of hour worked}

Taking the total pay as 900. As, to make the shop A and shop B equal.

\begin{gathered} 900=25\times Number\text{ of hour worked} \\ Number\text{ of hour worked}=\frac{900}{25}=36 \end{gathered}

Hence, he would have to log 36 hours during a week at Shop B in order to match the salary at Shop A.

7 0
1 year ago
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