MATHEMATICS HIGH SCHOOL

5y – 2x = 4 and x = 8.

Answers

Answer 1
Answer:

Answer:

y = 4 is the correct solution.

Step-by-step explanation:

If x = 8, then we can plug this into the equation 5y – 2x = 4 to solve for y:

5y – 2(8) = 4

5y – 16 = 4

5y = 20

y = 4

Therefore, the solution to the system of equations 5y – 2x = 4 and x = 8 is y = 4.

We can check our answer by substituting y = 4 into the original equation:

5(4) – 2x = 4

20 – 2x = 4

-2x = -16

x = 8

Since x = 8 is a solution to the original equation, we can confirm that y = 4 is the correct solution.

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A student made a model of a building. The model was 3 feet high and 12 feet wide. The building is 720 feet wide. Which proportion correctly show how to find the height of the building?

Answers

Ok, so what we do is simply divide 720 by 12
720/12=60 next you just multiply whatever part of the building by 60 in order to get a correct proportion in this case we are doing 60*3=180 and the answer is the height of the building must be 180 feet.

What is the missing number

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Well you need to spesific like mabie giving us some number.

What is the smiplest ratio for 75cm:1m:250 mm​

Answers

Answer:

You need to convert all the units to one unit

A glacier moves about 3 inches every 9 hours. At that rate, about how far does the glacier move in 36 hours?

Answers

Answer:


Step-by-step explanation:

Since 36 is divisible by 9 we can divide 36 by 9 to get 4 then you multiply 4 by the 3 inches to get 12. Or you could find the unit rate 1:12 and get it from there hope this helps!
12 inches

3 inch in 9h
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In the school cafeteria, students choose their lunch from 3 sandwiches, 3 soups, 4 salads, and 2 drinks.How many different lunches are possible for a student who chooses exactly 1 sandwich, 1 soup, 1 salad, and 1 drink?

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The student can choose any one of 3 sandwiches. For each of those . . .
He can choose any one of 3 soups.  For each of those . . .
He can choose any one of 4 salads.  For each of those . . .
He can choose either one of 2 drinks.

Total possibilities = (3 x 3 x 4 x 2) = 72 different lunches.

what rational number lies in between -14/31 and -17/33? A. -989/3069 B. -123/276 C. -989/2046 D. -4/7

Answers

-14/31 and -17/33

-17/33 - (-14/31) = (-17/33*31/31) - (-14/31*33/33) = -527/1023 +  462/1023

= (-527+462)/1023 = -65/1023 

-65/1023 ÷ 2 = -65/1023 * 1/2 = -65/2046

-17/33 - (-65/2046) = (-17/33*62/62) - (-65/2046) = -1054/2046 + 65/2046
= -989/2046 Choice C.
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