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weeeeeb [17]
3 years ago
6

Can you guy help me I am stuck

Mathematics
2 answers:
solmaris [256]3 years ago
5 0

The anserwer is D I hope this helps you!

Allushta [10]3 years ago
4 0

D. 49.5 is the answer

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Solve the system of equations. y = 2x y = x 2 – 15
inn [45]

Answer:

D. (–3, –6) and (5, 10)

Step-by-step explanation:

The system has equations:

y=2x...(1)

and

y=x^2-15...(2)

Equate both equations;

x^2-15=2x

Rewrite in standard form:

x^2-2x-15=0

We factor to obtain:

(x+3)(x-5)=0

By the zero product principle;

(x+3)=0,(x-5)=0

\implies x=-3,x=5

When x=-3, y=2(-3)=-6

This yields the ordered pair (-3,-6).

When x=5, y=2(5)=10

This yields the ordered pair (5,10).

The correct choice is D.

8 0
3 years ago
Bob and rob in ratio 3:4 and their age 4 years ago was 5:7 find their ages
Trava [24]

Answer:

Present Day:

Bob:Rob:Difference

 3   :  4  :        1

 6   : 12  :       2

4 years ago:

Bob:Rob:Difference

    5 : 7 : 2

6 0
3 years ago
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