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3 years ago

Which expression is equivalent to 30 (1/2x - 2) +40 (3/4y-4)? (will add pic)

Mathematics

1 answer:

bixtya [17]3 years ago

7 0

Answer:

Step-by-step explanation:

Given

30( $\frac{1}{2}$ x - 2) + 40( $\frac{3}{4}$ y - 4)

Multiply each of the terms in the first parenthesis by 30 and multiply each of the terms in the second parenthesis by 40.

= 15x - 60 + 30y - 160

= 15x + 30y - 220 → C

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creativ13 [48]

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3 years ago

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Corey has a garden in the shape of a square. The garden covers 64 square feet. What are the possible dimensions?

Valentin [98]

Answer:

64 = 1 x 64, 2 x 32, 4 x 16, or 8 x 8.

Step-by-step explanation:

If a garden covers 64 square feet total, then you simply find the common factors of 64.

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So, the possible dimensions are,

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2 years ago

Solve the equation 3m=2(4+t) for t

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2 years ago

Determine the type and number of solutions of −4x2 − 3x + 7 = 0.

Kaylis [27]

Answer:

Step-by-step explanation:

You have to use the discriminant for this. If the quadratic is $-4x^2-3x+7$ , then

a = -4, b = -3, and c = 7. The formula for finding the discriminant is

$D=b^2-4ac$ which comes from the quadratic formula, but without the square root sign. Filling in:

$D=(-3)^2-4(-4)(7)$ which simplifies down to

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2 years ago

What is the slope of the line that contains the points (7, -3) and (-7, 4)?

tino4ka555 [31]

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$m = \dfrac{-3 - 4}{7 - (-7)}$

$m = \dfrac{-7}{14}$

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Answer: The slope is -1/2.

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2 years ago

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