3 years ago

Math question down below

Mathematics

1 answer:

Vinvika [58]3 years ago

5 0

Do 6.5” divided by 5 to find the slope . Then plot each point and

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2r2 + 3s3 − r2 + 4t2 − r2 if r = −2, s = −3, and t = 5.

Elza [17]

First, simplify the expression $2r^2 + 3s^3 - r^2 + 4t^2 - r^2.$ Here you have three terms with $r^2,$ group them in the following way:

$2r^2 + 3s^3 - r^2 + 4t^2 - r^2=2r^2-r^2-r^2+3s^3+4t^2=(2r^2-r^2-r^2)+3s^3+4t^2=$

$=r^2(2-1-1)+3s^3+4t^2=3s^3+4t^2.$

Then substitute s=-3 and t=5:

$3s^3+4t^2=3\cdot (-3)^3+4\cdot 5^2=3\cdot (-27)+4\cdot 25=-81+100=19.$

Answer: 19.

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3 years ago

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The height of a person in a scale drawing is 4 inches. The person's actual height is 64 inches.

Mariana [72]

I assume you're asking for the scale? It would be 4:64, which simplifies to 1:16.

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3 years ago

Marcus designed a large salt-water aquarium in the shape of a rectangular prism. The aquarium has a width of x feet. The length

Valentin [98]

Answer:

Step-by-step explanation:

Took the test.

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2 years ago

Use the distributive property to expand the following expression.

Levart [38]

Answer:

-12.8x - 20y + 8.4

Step-by-step explanation:

To do this you just multiply everything by negative 4

so we have 3.2x*-4 + 5y*-4 - 2.1*-4

This gives us

-12.8x - 20y + 8.4

The last term is positive because we multplied a negative by another negative

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3 years ago

Find the value of x that makes lines u and y parallel.

liberstina [14]

Answer:

x = 7

Step-by-step explanation:

If u // v, then

19x - 3 = 130 {Corresponding angles are congruent}

19x = 130 + 3

19x = 133

x = 133/19

x = 7

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3 years ago