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2 years ago

Can someone please solve this?

Mathematics

1 answer:

MrRa [10]2 years ago

8 0

I ran out of time. will come back in a few minutes to answer the question.

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Eliminate the x and y

sp2606 [1]

Step-by-step explanation:

Eliminate the x:

$\left\{\begin{array}{ccc}x-2y=6\\3x+y=4\end{array}\right\\\\\text{Multiply by (-3)}\\\\\left\{\begin{array}{ccc}-3(x-2y)=(-3)(6)\\3x+y=4\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-3x+6y=-18\\3x+y=4\end{array}\right}\\.\qquad\qquad7y=-14\\.\qquad\qquad y=-2$

Eliminate the y:

$\left\{\begin{array}{ccc}x-2y=6\\3x+y=4\end{array}\right\\\\\text{Multiply by 2}\\\\\left\{\begin{array}{ccc}x-2y=6\\2(3x+y)=(2)(4)\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}x-2y=6\\6x+2y=8\end{array}\right}\\\\.\qquad7x=14\\.\qquad x=2$

7 0

3 years ago

Helpp me plssssss????

snow_tiger [21]

Answer:

Step-by-step explanation:

The radius is 4 making the diameter 16 you need the other side since in half so that leaves you with answer C...16 $\pi yd^2$

3 0

3 years ago

Bob owned 25 pairs of shoes in January, but then he sold a bunch and now owns 12. What is the percent decrease?

polet [3.4K]

52% decrease hope this helps!!

5 0

3 years ago

The volume of a Toblerone candy bar is 275 cm3. If the candy bar is 11 cm long, what is the area of the base?

algol [13]

Answer:

275 - 11=264

Step-by-step explanation:

5 0

3 years ago

The simple interest on a sum of money invested for 6 months at 5% per annum is $1680. Find the amount of money invested

olga55 [171]

9514 1404 393

Answer:

$67,200

Step-by-step explanation:

The amount if interest is given by the formula ...

I = Prt

where P is the amount invested, r is the annual rate, and t is the number of years. Here, we want to find P when r = 0.05 and t = 1/2 such that I = 1680.

P = I/(rt) = $1680/(0.05·0.5) = $1680/0.025

P = $67,200

The amount invested was $67,200.

3 0

3 years ago