All categories

3 years ago

20 POINTS PLZ HELP!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

djyliett [7]3 years ago

5 0

Answer:

$5a - 5 - 15 = 3a + 6 + 4 \\ 5a - 3a = 5 + 15 + 6 + 4 \\ 2a = 30 \\ \frac{2a}{2} = \frac{30}{2} \\ a = 15$

mars1129 [50]3 years ago

3 0

Answer:

a = 15

Step-by-step explanation:

First, you have to combine like terms: 5a and 3a, -5, -15, 6, and 4.

You can do it in any order and you will always get a = 15 for your answer.

Hope this helps!!!

You might be interested in

Does anyone know what the √2.25 is when rewritten as a fraction?

Zinaida [17]

Answer: $\sqrt{\frac{9}{4} }$

Step-by-step explanation:

This is what it is as a mixed number

$\sqrt{2.25}$

= $\sqrt{2\frac{1}{4} }$

= $\sqrt{\frac{9}{4} }$

If you want it written in exponential form it would look like this:

$(\frac{9}{4}) ^{\frac{1}{2} }$

5 0

2 years ago

Read 2 more answers

Y-4=-2(x-3) in standard form using integers

Brut [27]

Answer:

-2x-6 I think

Step-by-step explanation:

I think that it is -2x-6 because I did -2 and x is -2x and -2 times -3 is 6.

5 0

2 years ago

PLEASE HELP WITH THIS! ITS ALREADY LATE AND I JUST WANNA GET IT DONE

MArishka [77]

The answer is 61.92 all u do is 3 x 20.64

6 0

3 years ago

4 friends share 3 oranges equally

skad [1K]

Each will get 1.33 orange.

4 0

3 years ago

Read 2 more answers

The test scores on a 100-point test were recorded for 20 students:71 93 91 86 7573 86 82 76 5784 89 67 62 7277 68 65 75 84a. Can

Dafna11 [192]

Answer: a. Yes

b. mean = 76.65

standard deviation = 10.04

c. 76.65 ± 4.4

Step-by-step explanation:

a. Stem and leaf Plot shows the frequencies with which classes of value occur. To create this plot, we divide the set of numbers into 2 columns: stem, the left column, which contains the tens digits; leaf, the right column, which contains the unit digits.

Normal distribution is a type of distribution: it's a bell-shaped, symmetrical, unimodal distribution.

A stem and leaf plot displays the main features of the distribution. If turned on its side, we can see the shape of the data.

The figure below shows the stem and leaf plot of the 100-point test score. As we can see, when turned, the plot resembles bell-shaped distribution. So, this test scores were selected from a normal population.

b. Mean is the average number of a data set. It is calculated as the sum of all the data divided by the quantity the sample has:

mean = $\frac{\Sigma x}{n}$