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2 years ago

6

QUICK HELP!! If two linear equations have one solution, then the...

1 answer:

nevsk [136]2 years ago

3 0

Answer:

A

Step-by-step explanation:

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Someone please help!!!!

Sergeu [11.5K]

12 = 3x - 15
12 + 15 = 3x
27 = 3x
27/3 = x
9 = x
x = 9

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3 years ago

melamori03 [73]

Answer:

Step-by-step explanation:

if you could rephrase this i would answer it

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3 years ago

Read 2 more answers

If oscar the ostrich travels 76 miles in 2 hours on land how fast does he travel

Vikentia [17]

I think the answer is 38 miles I hope this helped!

3 0

3 years ago

Given: ΔPSQ, PS = SQ PΔPSQ = 50 SQ – PQ = 1 Find: Area of ΔPSQ

Pachacha [2.7K]

The first part is to find the length SQ which is equal to SP.
Use the sine rule.
SQ/sin 65 = (SQ - 1)/Sin50
(sin50)/(sin 65) = (SQ-1)/SQ
0.8452(SQ) = SQ-1
0.1547SQ = 1
SQ = 6.46
The formula to apply here is:
Area=1/2(SQ)(SQ)sin50
= 0.5 × 6.46 × 6.46 × sin50
= 15.984

3 0

3 years ago

The function C(x) = -2x2 + 38x + 40 models the sales, in hundreds of

finlep [7]

Question:

Rewrite the function to reveal when sales of compact discs and $0.

Answer:

The cost in 2010 is $0

Step-by-step explanation:

Given

$C(x) = -2x^2 + 38x + 40$

Required

Find x when $C(x) = 0$

This gives:

$C(x) = -2x^2 + 38x + 40$

$-2x^2 + 38x + 40=0$

Expand

$-2x^2 + 40x -2x+ 40=0$

Factorize:

$-2x(x - 20) -2(x- 20)=0$

$(-2x - 2)(x- 20)=0$

Solve for x

$-2x-2=0\ or\ x - 20 = 0$

$x = -1\ or\ x = 20$

x represents time. So, it cannot be negative.

$x = 20$

20 years after 1990 is: 2010. Hence, the cost in 2010 is $0

6 0

3 years ago