3 years ago

Evaluate x2 + 3x ; x = -3

Mathematics

1 answer:

stepladder [879]3 years ago

5 0

The answer would be -15

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Alina [70]

I think the answer would be D

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2 years ago

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10 less than the product of

Snezhnost [94]

Answer:

x=45

Step-by-step explanation:

2/5x-10=8

2/5x=18

x=18÷2/5

x=18(5/2)

x=45

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2 years ago

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2. The electrical resistance R of a wire varies inversely with the square of its diameter d. If a wire with a

Mariulka [41]

Answer:

$0.225 \Omega =225 m\Omega$

Step-by-step explanation:

We know (Ohm second law) that $R= \frac{k}{d^2}$ where k inlcudes the rest of the parameters (material, lenght). In our situation we have k= $0.4\cdot9 \Omega mm^2$ . The moment the diameter becomes 8mm R becomes

$R= {{0.4\cdot 9}\over{16}} \Omega = 0.225 \Omega$

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3 years ago

Kelly reads x hours a week. Tim reads two times more than Kelly and Jim reads five hours more than Tim. Which expression relates

In-s [12.5K]

Answer:

C. 2x + 5

Step-by-step explanation:

Kelly: x

Tim: 2 × x = 2x

Jim: 2x + 5

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3 years ago

What is 70 percent of 1872

uranmaximum [27]

Answer:

1310.4

Step-by-step explanation:

1872 x 0.7 = 1310.4

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3 years ago

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