3 years ago

What is the value of this expression when a=4, b=-5, and c=-7?

Mathematics

1 answer:

nasty-shy [4]3 years ago

4 0

Answer: C. 6 1/6

Step-by-step explanation:

2 * -5 * -7 = -10 * -7 = 70

70 + 4 = 74

3 * 4 = 12

74/12 = 6 1/6

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Mr.Nelson bought a coat on sale for $27 less than third its original price . He paid $54. What was the original price?

MAVERICK [17]

Answer:

$243.

Step-by-step explanation:

We can use algebra here.

Let x = the original price.

Then 1/3 x - 27 = 54

1/3x = 54 + 27 = 81

x = 81 / 1/3

x = 81 * 3

x = $243 (answer).

6 0

3 years ago

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A red marble is selected at random from a bag containing 2 blues and 9 red marbles and is not replaced.the probability that a se

meriva

Answer:

So the probability of drawing a second red marble is 8 out 10 or 0.8.

Step-by-step explanation:

It seems to me that if one red marble is already gone, there are 8 red marbles left out of a total of 10 marbles.

So the probability of drawing a second red marble is 8 out 10 or 0.8.

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2 years ago

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Find the probability that a randomly selected student drives to school.

Slav-nsk [51]

Answer:

the answer is 40 percent

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3 years ago

Brenna owns 9 T-shirts, 3 of which are red.

Ulleksa [173]

Answer:

1/3

Step-by-step explanation:

9 Shirts, 3 are Red

Probability: 3/9

Simplify: 1/3

5 0

2 years ago

Slope = 2/5; passes through (-3,1)

nydimaria [60]

Presumably we're after the line with that slope through that point. In general the line through $(a,b)$ with slope $m$ is

$y-b = m(x-a)$

Here we have $a=-3, b=1, m=\frac 2 5$

$y - 1 = \frac 2 5 (x--3)$

$y = \frac 2 5 x + \frac 6 5 + 1$

$y = \frac 2 5 x + \frac{11}{5}$

Check: The slope is clearly $\frac 2 5$
so we check

$y = \frac 2 5 (-3) +\frac{11}{5} = \frac 5 5 = 1 \quad\checkmark$

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3 years ago