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3 years ago

Help please if u can I really need if so ty

Mathematics

1 answer:

saul85 [17]3 years ago

4 0

Answer:hewwo I’m in school sorry for not talking to you

Step-by-step explanation:

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А 3х + 2y = 8<br>2x + 3y = 12

Tpy6a [65]

Answer:

(0,4)

Step-by-step explanation:

subsistution method

solve equation for y

subsiture the value of y

solve the equation

check the solution

7 0

3 years ago

Find the sum of the geometric series.

sveticcg [70]

Answer:

40/3 option B

Step-by-step explanation:

20-10+5-5/2+ ...

We need to find the sum of infinite geometric series

$S_n = \frac{a}{1-r}$

a is the first term (20)

r is the common ratio

To find common ratio we divide second term by first term

r= $\frac{-10}{20} = -\frac{1}{2}$

now we plug in the values

$S_n = \frac{20}{1-(-\frac{1}{2}}$

$S_n = \frac{20}{1+\frac{1}{2}}$

$S_n = \frac{20}{\frac{3}{2}}$

$S_n = 20 * \frac{2}{3}$

sum = 40/3

7 0

4 years ago

A 270 $ suit is marked down by %.20 Find the sale price.

Bond [772]

Answer:

$216

Step-by-step explanation:

Do $\frac{20}{100}$ = 0.2. Now you do 270 x 0.2, which equals 54. Finnaly you do 270-54, which equals 216. So now you have your answer.

7 0

3 years ago

Every weekend, jaylon downloads interesting music on his phone from an app. He downloads 15 songs at $1.99 and 7 songs at $2.50.

butalik [34]

Answer:

15*1.99

7*2.50

Step-by-step explanation:

I think you would multiply them (im not sure im not very good with math if its wrong im really sorry hope you get it though good luck :) ! )

6 0

3 years ago

Evaluate the expression for R equals 5 S equals -4 and T equals 7. ( r - t)(2t+5)

Firlakuza [10]

Answer:

-38

Step-by-step explanation:

3 0

3 years ago