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4 years ago

(a) An angle measures 64°. What is the measure of its complement?

Mathematics

1 answer:

Y_Kistochka [10]4 years ago

4 0

Answer:

(a) 26 degrees

(b) 35 degrees

Step-by-step explanation:

(a) complementary angles add up to 90 degrees, therefore the complementary angle to 64 degrees would be 90 - 64, or 26 degrees.

(b) supplementary angles add up to 180 degrees, therefore the supplementary angle to 145 degrees would be 180 - 145, or 35 degrees.

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Equation=
y+7=77

77-7=70

The value of y is 70

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4 years ago

Silver scooter finds that it costs $300 to produce each scooter and the fixed costs are $750. The price is given by p=900-x, whe

Nady [450]

Cost = 300 x + 750 , where x is the number of the scooters;
Price = 900 - x
Profit = x ( 900 - x ) - ( 300 x + 750 ) =
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d (Profit) = - 2 x + 600
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3 years ago

Which polynomial, when added to the polynomial 5x^2–3x–9, is equivalent to x^2–5x+6?

Anna71 [15]

Answer:

$-4\cdot{x^2}-2\cdot{x}+15$

Step-by-step explanation:

We can look at the terms one by one. We know that to get 5 to 1 we must add -4 so the first term is:

$-4\cdot{x^2}$

For the x term to go from -3 to -5 we must add -2, so the second term is

$-2\cdot{x}$

Lastly, to go from -9 to 6 we must add 15. The final polynomial added is:

$-4\cdot{x^2}-2\cdot{x}+15$

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3 years ago

On a recent day a Euro was equal to about 1.2 American dollars. Write an expression which estimates the number of dollars in x E

Alekssandra [29.7K]

Euro = 1.2 Dollars

x Euros = 1.2*x Dollars

x Euros = 1.2x Dollars

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4 years ago

Which expressions are equivalent when y = 2 and y = 5? 2 y minus 1 and 3 y minus 5 + y 5 y + 4 and 7 y + 4 minus 2 y y + 7 and y

noname [10]

Answer:

Option b

Explanation:

The question is shown in the attached image

To answer this question, we will simply substitute in the given expressions with the values y=2 and y=5

The correct option will be the one having equal vales in both cases

1. Option a:

At y = 2:

2y - 1 = 2(2) - 1 = 3

3y - 5 + y = 3(2) - 5 + 2 = 3

At y = 5:

2y - 1 = 2(5) - 1 = 10

3y - 5 + y = 3(5) - 5 + 5 = 15

This option is incorrect, since both expressions are not equal at y = 5

2. Option b:

At y = 2:

5y + 4 = 5(2) + 4 = 14

7y + 4 - 2y = 7(2) + 4 - 2(2) = 14

At y = 5:

5y + 4 = 5(5) + 4 = 29

7y + 4 - 2y = 7(5) + 4 - 2(5) = 29

This option is correct, since both expressions are equal at the two vales of y

3. Option c:

At y = 2:

y + 7 = 2 + 7 = 9

y + 2 + y = 2 + 2 + 2 = 6

At y = 5:

y + 7 = 5 + 7 = 12

y + 2 + y = 5 + 2 + 2 = 12

This option is incorrect, since both expressions are not equal at y = 2

4. Option d:

At y = 2:

3y - 4 = 3(2) - 4 = 2

3y - 2 + y = 3(2) - 2 + 2 = 6

At y = 5:

3y - 4 = 3(5) - 4 = 11

3y - 2 + y = 3(5) - 2 + 5 = 18

This option is incorrect, since both expressions are neither equal at y = 2 or y = 5

Hope this helps :)

8 0

4 years ago