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SCORPION-xisa [38]
3 years ago
15

Joan has 287 dollars to spend on 7 books after buying them she had 14 dollars how much did the books cost

Mathematics
1 answer:
Bezzdna [24]3 years ago
7 0

Step-by-step explanation:

287 - 7x = 14

-7x = 14 - 287

x = -273 ÷ -7

× = 39 dollars

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Rewrite in simplest terms: 9(m-9)-4(10m+2)9(m−9)−4(10m+2)
trasher [3.6K]

The required simplified expression for 9(m - 9) - 4(10m + 2) is  -31m - 90.

Given that,
To rewrite in simplest terms: 9(m-9)-4(10m+2).


<h3>What is simplification?</h3>

The process in mathematics to operate and interpret the function to make the function simple or more understandable is called simplifying and the process is called simplification.

Question asked to simplify the term 9(m-9)-4(10m+2).

= 9(m - 9) - 4(10m + 2)
= 9m - 81 - 40m - 8
=  -31m - 90

Thus, the required simplified expression for 9(m - 9) - 4(10m + 2) is  -31m - 90.

Learn more about simplification here: brainly.com/question/12501526

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7 0
2 years ago
-2(3x+4)&lt;-4+8 solve the inequality
Shtirlitz [24]

Answer:

Inequality: x > -2

Interval Notation: ( -2, ∞)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
30PTS TO ANYONE WHO CAN ANSWER WITH THIS PROBLEM
Anni [7]

Answer:

y\tan{x°}

Step-by-step explanation:

well, by using definition of tan of an angle

let the distance between Earth and shooting star is d.

since \frac{d}{y}=\tan{x°},

then d=y\tan{x°}

8 0
3 years ago
Evaluate -3x² + 4x-2 for x = 2.<br> A. -2<br> B. -1<br> C. -6<br> D. 18
kobusy [5.1K]

Answer:

C. -6

Step-by-step explanation:

-3(2)²+4(2)-2

-3(4) + 8 - 2

-12+8-2

-14+8

-6

5 0
2 years ago
Adult male heights have a normal probability distribution with a mean of 70 inches and a standard deviation of 4 inches.
nexus9112 [7]

Answer: 0.84134

Step-by-step explanation:

We need to find the z-score for the given information first since this will help us find the probability. The formula for this is

Z score = \frac{x - \mu}{\sigma}

We have

x = 66 inches (the raw score)

\mu = 70 inches (the population mean)

\sigma = 4 inches (the standard deviation)

This gives

Z score = \frac{x - \mu}{\sigma} = \frac{66-70}{4} = -1

If you use a calculator, or a Z-score table then P(x > Z) is just P(Z > -1) which gives a probability of 0.84134.

7 0
2 years ago
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