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3 years ago

(-2x-8) (-3x² + 4x+5)

Mathematics

1 answer:

marissa [1.9K]3 years ago

3 0

Answer:6x^3+16x^2-42x-40

Step-by-step explanation:

To expand

(-2x-8)(-3x^2+4x+5)

6x^3-8x^2-10x+24x^2-32x-40

Collect like terms

6x^3-8x^2+24x^2-10x-32x-40

6x^3+16x^2-42x-40

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Plz help me I’m a desperate little boy

Lubov Fominskaja [6]

Answer:

They would be going at 56 miles per hour.

Step-by-step explanation:

You just take the miles they traveled (1,750) and divide it by the hours it took to get ther (31) the equation qould look like this 1,750 / 31 = 56

miles per hour is measured by how far you go and how long it takes to get there!

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4 years ago

Read 2 more answers

In the figure, x:y = 2:3 and y:z = 3:5. If x = 10, find the value of z. 15 20 25 30

Solnce55 [7]

x:y =x: y

10: y =2:3

2y=30

y=15

y:z=y:z

15:z=3:5

3z=75

z=25

7 0

3 years ago

Assuming the probability of a single sample testing positive is 0.15, find the probability of a positive result for two samples

Grace [21]

Answer:

$P(Positive\ Mixture) = 0.2775$

The probability is not low

Step-by-step explanation:

Given

$P(Single\ Positive) = 0.15$

$n = 2$

Required

$P(Positive\ Mixture)$

First, we calculate the probability of single negative using the complement rule

$P(Single\ Negative) = 1 - P(Single\ Positive)$

$P(Single\ Negative) = 1 - 0.15$

$P(Single\ Negative) = 0.85$

$P(Positive\ Mixture)$ is calculated using:

$P(Positive\ Mixture) = 1 - P(All\ Negative)$ ---- i.e. complement rule

So, we have:

$P(Positive\ Mixture) = 1 - 0.85^2$

$P(Positive\ Mixture) = 1 - 0.7225$

$P(Positive\ Mixture) = 0.2775$

Probabilities less than 0.05 are considered low.

So, we can consider that the probability is not low because 0.2775 > 0.05

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3 years ago

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3 years ago

Grace Oatman bought 6 1/3 yd. of material for $4.95 per yard. What was the cost of the material?

DanielleElmas [232]

Answer:

The total cost of the material was $31.35

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4 years ago