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3 years ago

Solve the system by substitution.

Mathematics

1 answer:

Andreas93 [3]3 years ago

7 0

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Answer:
(10,-20)

Hope this helps
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Help me with math. Don't put a link i will REPORT you.

Mashcka [7]

Answer:

4, 20, 2

Step-by-step explanation:

The relationship between x and y is multiplication by 4:

9*4 = 36

4*4 = 16

5*4 = 20

2*4 = 8

7 0

3 years ago

Read 2 more answers

WILL REWARD BRAINIEST! What is the volume of the composite figure if both the height and the diameter of the cylinder are 10.5 f

Mashutka [201]

Answer:

908.74

Step-by-step explanation:

The formula for the volume of a cylinder is V = h * pi * r^2

h is height, r is radius, and pi is 3.14. The radius is half of the diameter, so that would make the radius 5.25.

So now plug it into the formula:

V = 10.5 * pi * (5.25)^2

= 908.74

Hope this helped! :)

7 0

3 years ago

Brianna received an overall IQ score of 117 on the Wechsler Scale. This means that Brianna has scored approximately____________

Tresset [83]

Using the normal distribution, it is found that the correct option is:

D. 1; 100

In a <em>normal distribution</em> with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

It measures how many standard deviations the measure is from the mean.

In this problem:

The mean on the Wechsler Scale is of 100, hence $\mu = 100$ .

The standard deviation is of 17, hence $\sigma = 17$ .

Brianna had an score of 117, hence $X = 117$

Then:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{117 - 100}{17}$

$Z = 1$

Hence, the option d is correct.

To learn more about the normal distribution, you can check brainly.com/question/24663213

7 0

3 years ago

Between 1998 and 2018, inflation for prices of goods and services has been about 51%. Suppose a salon charged $18 for a basic ha

leonid [27]

9514 1404 393

Answer:

$22.12
$24.51

Step-by-step explanation:

For some growth factor f each year, the growth factor over 20 years is given as ...

f^20 = 1 +0.51 = 1.51

Then the growth factor in 10 years is ...

f^10 = (f^20)^(1/2) = √1.51 ≈ 1.22882

a) In the 10 years between 1998 and 2008, the price of a basic haircut would rise to ...

$18 × 1.22882 ≈ $22.12 . . . price in 2008

b) In the 10 years between 2003 and 2013, the price of a basic haircut would rise to ...

$19.95 × 1.22882 ≈ $24.51 . . . price in 2013

5 0

3 years ago

A company rents out 13 food booths and 27 game booths at the county fair. The fee for a food booth is $50 plus $6 per day. The f

Stella [2.4K]

Answer:

2000 + 321d

Step-by-step explanation:

It is stated that there are 13 food booths and 27 game booths.

The fee for a food booth is a flat 50 dollars. There are 13 food booths. SO

13 x 50 = 650 -----> This is one part of our expression.

Next, it is 6 dollars per day per food booth, and there are 13 food booths. SO

13 x 6d =78d (Note that it says that D can be used for the number of days)

Next, we need to solve for the game booths. A game booth also has a flat fee of 50 dollars. There are 27 of them.

50 x 27 = 1350 -----> This is the second part of our equation.

Next we need to calculate the amount per day per game booth.

9d x 27 = 243d. Putting all of these together, we get ---->

1350 + 650 + 243d + 78d

Adding all these up together, we get:

2000 + 321d

Note: I double checked my work, put a comment if you want me to show my double checking. ALSO Moderators, please don't delete this answer. It took a lot of work to make it. It would also help if you give me brailiest.

6 0

3 years ago