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3 years ago

7th grade Math Help pleaseee

Mathematics

1 answer:

never [62]3 years ago

3 0

Answer:

14. 2

15. 7

16. 3

17. 8

11. 490

12. 9

13. 27

Step-by-step explanation:

14. 15y = 30 --> y = 30/15 = 2

15. 7t = 49 --> 49/7 = 7

16. 4 + 4x = 16 --> 4x = 16 - 4 = 12 --> x = 12/4 = 3

17. 4x + 2x = 48 --> 6x = 48 --> x = 48/6 = 8

11. r/7 = 70 --> r = 490

12. k/9 = 6 - 5 = 1 --> k = 9

13. b/3 = 9 --> 27

*You may plug in to check :)

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How do you find line e?

jolli1 [7]

Answer:

The answer to your question is the slope of line e is $\frac{4}{5}$

Step-by-step explanation:

If two lines are parallel they have the same slope.

If two lines are perpendicular their slopes are reciprocals and of different signs.

In this question, line d is parallel to line e, which means that they have the same slope.

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3 years ago

What the slope of(4,-13) (8,-8)

agasfer [191]

Answer:

5/4

Step-by-step explanation:

1. -13 - -8 = -5

2. 4-8 = -4

3. -5/-4 = 5/4

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3 years ago

Read 2 more answers

A real estate broker sold your house for $189,000. The broker's commission was 4.5 percent of the selling price. How much would

k0ka [10]

First, we are going to find the commission of the broker. To do that we are going to multiply the selling price of your house by 4.5 percent:
$189000*$ 4.5%= $189000* \frac{4.5}{100}=8505$

Next we are going to subtract the broker's commission ($8505) from the selling price of your house:
$189000-8505=180495$

We can conclude that you will get $180,495 from your house after the commission is paid.

3 0

3 years ago

which is a function? {(8,9),(−2,9),(7,5),(−4,−7)} {(−5,−7),(−5,4),(−2,−8),(3,5)} {(8,0),(−4,−2),(7,1),(0,0)} {(−8,3),(−5,−7),(−4

Ronch [10]

Answer:

<h2> All but the second</h2><h2> {(8,9),(−2,9),(7,5),(−4,−7)}</h2><h2> {(8,0),(−4,−2),(7,1),(0,0)} </h2><h2> {(−8,3),(−5,−7),(−4,5),(9,3)}</h2>

Step-by-step explanation:

Function means that for each x we get y, and no no x gives two different y-es

{(−5,−7),(−5,4),(−2,−8),(3,5)} for x = -5 we have two different y-es therefore its not function

8 0

3 years ago

Data for a particular subdivision near downtown Houston indicate that the average price per square foot for a home is $100 with

spayn [35]

Answer:

$P(X>110)=P(\frac{X-\mu}{\sigma}>\frac{110-\mu}{\sigma})=P(Z>\frac{110-100}{5})=P(z>2)$

And we can find this probability with the complement rule and we got:

$P(Z>2) = 1-P(Z$

And using the normal standard table or excel we got:

$P(Z>2) = 1-P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the prices of a population, and for this case we know the distribution for X is given by:

$X \sim N(100,5)$