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stellarik [79]
3 years ago
15

(2-y)/(y+7)=3/5 what is the answer

Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
3 0
Multiplying both sides by y+7, we get 2-y=(3y+21)/5 and then by multiplying both sides by 5 we get 10-5y=3y+21. After that, subtract 21 from both sides as well as add 5y to both sides to get -11=8y, so divide by 8 to get -11/8=y
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A company that makes​ hair-care products had 5000 people try a new shampoo. Of the 5000 ​people, 40 had a mild allergic reaction
asambeis [7]

Answer:

0.8% of people had a mild allergic reaction

Step-by-step explanation:

First, divide the number of people who had a mild reaction to the total amount of people.

0.008

Second, multiply by 100%.

0.008 * 100% = 0.8%

Best of Luck!

7 0
3 years ago
Read 2 more answers
0.737 ___ 0.708<br> 0.708 &gt; 0.737<br> 0.737 = 0.708<br> 0.737 &lt; 0.708<br> 0.737 &gt; 0.708
irina1246 [14]

Answer:

0.737>0.708

Step-by-step explanation:

it must me d because 0.737 is greater than 0.708 and it's the only true Statement

3 0
2 years ago
The pizza has an area of 78.5 in². What is the minimum width of a placemat that can be placed underneath it so that the pizza do
xz_007 [3.2K]

Answer:

The minimum width of the placemat is 10 inches.

Step-by-step explanation:

Let suppose that placemat has a square form, whose width must be at least equal to the diameter of the pizza, so that pizza does not touch the table. Hence, the following relationship is obtained:

w = D

Where:

w - Width of the placemat, measured in inches.

D - Diameter of pizza, measured in inches.

The area of the pizza, measured in square inches, is determined by this formula:

A = \frac{\pi}{4} \cdot D^{2}

The diameter is cleared afterwards:

D = \sqrt{\frac{4\cdot A}{\pi} }

If A = 78.5\,in^{2} and \pi = 3.14, then:

D = \sqrt{\frac{4\cdot (78.5\,in^{2})}{3.14} }

D = 10\,in

The minimum width of the placemat is 10 inches.

4 0
4 years ago
Read 2 more answers
A student earns 85% of the points on a test. If the student earns 34 points, how many points is the test worth ?
Liono4ka [1.6K]

Answer:

The test was worth 40 points

Step-by-step explanation:

34/40 = .85

             85%

3 0
4 years ago
4x-5y=-15 <br> 7x-2y=21 <br> X=<br> Y=
Helen [10]

Answer:

The values of x and y to the given equations are x=5 and y=7

Step-by-step explanation:

Given equations are 4x-5y=-15\hfill (1)

7x-2y=21\hfill (2)

To solve the given equations by elimination method :

Multiply the equation (1) into 2 we get

8x-10y=-30\hfill (3)

Multiply the equation (2) into 5 we get

35x-10y=105\hfill (4)

Now subtracting the equations (3) and (4) we get

8x-10y=-30

35x-10y=105

_________________

-27x=-135

x=\frac{135}{27}

Therefore x=5

Now substitute the value of x=5 in equation (1) we get

4(5)-5y=-15

20-5y=-15

-5y=-15-20

-5y=-35

y=\frac{35}{5}

Therefore y=7

The values are x=5 and y=7

4 0
3 years ago
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