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4 years ago

6x+8y=30

1 answer:

8 0

First substitute .5x in for y to get a solvable equation. You should get 6x+8(.5x)=30. Then multiply 8 times .5 to get 6x+4x=30. Then combine like terms (6x+4x) to get 10x=30 and divide both sides by 10 to get x=3. Then plug this x value (3) into the other equation (y=.5x) to find the value of y. Y=.5(3) so y=1.5. Therefore the answer is B.

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Find the product. (r – 8)(r + 3)

Anuta_ua [19.1K]

Answer:

Step-by-step explanation:

if R = 9

9-8=1

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3 years ago

Galactic Rotation Speed. We are located about 27,000 light-years from the galactic center and we orbit the center about once eve

Alexxandr [17]

Answer:

speed = 796142.197 km/hr

Step-by-step explanation:

solution

we consider here orbit around galactic center is circular so

circumference formula will be here

circumference C = 2πr ........1

here we know r = 27000

circumference C = 2 π × 27000

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so distance will be

distance = $\frac{169560}{230000000}$

distance = 0.00073721 light year/year

and we know 1 year = 8760 hours

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sped of moving is

speed = 0.00073721 × 9.46027 × $\frac{10^{12}}{8760}$ km/hr

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4 years ago

Which of the following is the constant ratio of the relation shown in the table?

Dafna11 [192]

There is no constant ratio

4 0

3 years ago

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What is the degree of the following polynomial? 2x^7+4-3x^3+5x^8-4x

Stells [14]

Answer:

Step-by-step explanation:

The degree of a polynomial is the same as its highest exponent. Even though this one is "out of order", per se, and starts with an exponent of 7, there is an exponent of 8, which is also the highest exponent in the polynomial. This is an 8th degree polynomial.

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2 years ago

Will give brainiest

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3 years ago

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