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2 years ago

Simplify 7 + (−3) A: -10 B: -4 C: 4 D: 10

Mathematics

1 answer:

ad-work [718]2 years ago

5 0

Answer: 4

Step-by-step explanation:

$7+(-3)\\=7-3\\=\boxed{4}$

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What is the value of R, what is the value of EF

yarga [219]

9r - 6 = 8r + 3
r = 9
EF = 4r + 19 = 4(9) + 19 = 36 + 19 = 55

hope it helps

4 0

3 years ago

Amanda is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Co

Tema [17]

Answer:

For mileages higher than 80 miles Company A will charge less than Company B

Step-by-step explanation:

Hi, to answer this question we have to write an inequality:

Company A charges $111 and allows unlimited mileage.

Company A =111

Company B has an initial fee of $55 and charges an additional $0.70 for every mile driven

Company B = 55+0.70m

Where m is the number of miles.

Company A has to charge less than Company B

a<b

111 < 55+0.70m

Solving for m

111-55 < 0.70 m

56 < 0.70m

56/0.70 < m

80 < m

For mileages higher than 80 miles Company A will charge less than Company B

5 0

3 years ago

Rewrite 128 in an expomential notion using 2 as a base

KiRa [710]

$\underbrace{2\times 2\times 2\times 2\times 2\times 2 \times 2} = 128\\\\~~~~~~~~~~~~~~~~~7\\\\\\\boxed{\bf{2^7 =128}}}$

3 0

3 years ago

Assume that the heights of women are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If

vesna_86 [32]

Answer:

<h2>The probability is 58 %.</h2>

Step-by-step explanation:

This problem belong to a normal distribution probability.

Mean = 63.6

Standard Deviation = 2.5.

We have to find the probability of a height greater than 63.0.

Due to the normal probability, we need to find the Z score first:

$Z=\frac{x-u}{o}$ ; where x is the height, u is the mean, and o is the standard deviation.

$Z=\frac{63-63.6}{2.5} \\Z= -0.24$

Once we have our Z score, we find the probability with the z-table (attached). So, for a z score of -0.24 we have a probability of 0.42.

But, the problem is asking for height greater than 63.0, this mean that we have to subtract 0.42 from 1, giving as result 0.58, which means a 58% of probability,

6 0

3 years ago

Craig went out to eat and the bill was $12.68 before tax. If the sales tax is 8% how much will Craig pay for his meal? (round to

hodyreva [135]

Answer:

$13.69

Step-by-step explanation:

Before Tax Price: $12.68

Sale Tax: 8.00% or $1.01

After Tax Price: $13.69

6 0

3 years ago