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2 years ago

I need help on 5-7. Its a little confusing for me

Mathematics

1 answer:

Len [333]2 years ago

8 0

Answer:

5. x = 5, y = 3

6. x = 0, y = 4

7. x = -1, y = 1

Step-by-step explanation:

5. substitute 3(value of y) into the equation y = x - 2:

=> 3 = x - 2

=> x = 5

6. substitute 0(value of x) into the equation y = x + 4:

=> y = 0 + 4

=> y = 4

7. substitute 1(value of y) into the equation y = 2x + 3:

=> 1 = 2x + 3

=> 2x = -2

=> x = -1

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Which expression has a value of 16?

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In the first question, is 4. Part of the question?

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1 year ago

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-18y + 7 = -29. What does y equal. (I’m very bad at math)

Olin [163]

Answer:

y=2 (correct if wrong)

Step-by-step explanation:

-18y + 7 = -29

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John has four more buckles than dimes in his pocket, for a total of $1.25 which equation could be used to determine the number o

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2 years ago

5 ft is ____ % of 37 1 2 ft; 37 1 2 ft is ____ % of 5 ft

hichkok12 [17]

Answer:

The answer is:

5 ft is 13.33% of 37 1/2 ft; 37 1/2 ft is 750% of 5 ft.

Step-by-step explanation:

Given:

5 ft is ____ % of 37 1 2 ft.

Now, to find the __ :

Let __ be $x.$

So, 5 ft is $x\%$ of 37 1/2

$5=x\% of 37\frac{1}{2}$

⇒ $5=\frac{x}{100} \times \frac{75}{2}$

⇒ $5=\frac{75x}{200}$

Multiplying both sides by 200 we get:

⇒ $1000=75x$

Dividing both sides by 75 we get:

⇒ $13.33=x$

⇒ $x=13.33\%.$

Now, 37 1/2 ft is $x$ % of 5 ft.

$\frac{75}{2} =x\%\ of\ 5$

$\frac{75}{2}=\frac{x}{100}\times 5$

$\frac{75}{2} =\frac{5x}{100}$

Multiplying both sides by 100 we get:

$\frac{7500}{2} =5x$

Dividing both sides by 5 we get:

$750=x$

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Therefore, the answer is 5 ft is 13.33% of 37 1/2 ft; 37 1/2 ft is 750% of 5 ft.

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2 years ago

If x represents a number, then write an expression for a number that is three more than the number

myrzilka [38]

Saying "a number" is the same as saying "x"

"Three more than a number" is the same as "three more than x"

If you have three more of something (say, marbles) than someone else, then you have their number of marbles plus three more.

Then, "Three more than x" is the same as "three plus x", or "3 + x"

Hope this helps! :)

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