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3 years ago

12

There are five students of different ages. The median age is 13 years. What are two possibilities for the ages of the three olde

st students?

1 answer:

Xelga [282]3 years ago

4 0

13 and 14 becuase 13 being the third largest and 14 being the second largest

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The following proof shows an equivalent system of equations created from another system of equations. Fill in the missing reason

Nookie1986 [14]

Answer:

<h2>A.Multiplication Property of Equality</h2>

Step-by-step explanation:

$\left\{\begin{array}{ccc}2x+2y=14\\-x+y=5&\text{\underline{multiply both sides by 2}}\end{array}\right\\\\\boxed{\underline{+\left\{\begin{array}{ccc}2x+2y=14\\-2x+2y=10\end{array}\right}}\qquad\text{add both sides of the equations}\\.\qquad\qquad4y=24\qquad\text{divide both sides by 4}\\.\qquad\qquad y=6\\\\\text{put the value of y to the second equation:}\\\\-x+6=5\qquad\text{subtract 6 from both sides}\\-x=-1\qquad\text{change the signs}\\x=1$

8 0

3 years ago

Read 2 more answers

Tom has $15.86 to buy marbles that cost $1.25 each. he wants to know how many marbles he can buy. what should he do after he div

Oksanka [162]

Tom can buy 12 marbles.

4 0

3 years ago

Read 2 more answers

Helppppp how do u do number 1?

VashaNatasha [74]

Only A
And only when x = 1

Nothing else works.

4 0

3 years ago

17) 10(x + 3) -(-9x - 4) = x-5 +3

navik [9.2K]

Answer:

-2

Step-by-step explanation:

10x+30+9x+4=x-5+3

19x+34=x-2

18x=-36

x=-2

5 0

4 years ago

Find the surface area of the cylinder. Round your answer to the nearest hundredth.

horsena [70]

Answer:

C. 795.45 in^2

Step-by-step explanation:

The formula for the surface area of a cylinder is ...

SA = 2πr^2 +2πrh = 2πr(r +h)

For r=6 and h=15.1, the surface area is ...

SA = 2π(6)(6 +15.1) = π(12)(21.1) = 253.2π

SA ≈ 795.45 . . . . square inches

4 0

3 years ago