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earnstyle [38]
3 years ago
15

Can someone help me here

Mathematics
1 answer:
Over [174]3 years ago
8 0

Answer:

-2x^2+2x+7

Step-by-step explanation:

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After spending $5, Isaac had twice as much money as Luke. If Luke had $10, how much money did Isaac have at first?
Korolek [52]

Answer:

<u>$25</u>

Step-by-step explanation:

10*2=20

20+5=25

8 0
3 years ago
Home heating oil is sold by the gallon. Last winter the romano family used 370 gallons of oil at a price of $3.91 per gallon. If
shusha [124]
($3.91)(0.09) = $0.3519

$3.91 + 0.3519 = $4.2619 per gallon

if you're looking for the total expense next year:

($4.2619)(370 gallons) = $1,576.903
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Which is the value of x in the equation?<br> 4(x-3) = 40
mario62 [17]

Answer:14

Step-by-step explanation:

8 0
3 years ago
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You want to put $2,000 in a simple intrest account.It has a 2.5% annual interest rate.How long will it take you to earn $500 in
PSYCHO15rus [73]
The answer is C ten years. 2.5 percent of 2000 is 50 so take 50 and divide it by 500 which equals 10
3 0
3 years ago
Read 2 more answers
How do you work out this equation
Gnom [1K]

Answer:

x is equal to negative one, and y is equal to negative four.

Step-by-step explanation:

You can do this by solving one of the equations by either x or y, then substituting it into the other.  Let's solve the second one for y:

2y = 3x - 5\\y = \frac{3x - 5}{2}

Now we'll substitute that into the first equation:

9x - 2y = -1\\9x - 2(\frac{3x - 5}{2}) = -1\\9x - 3x + 5 = -1\\6x + 5 = -1\\6x = -6\\x = -1

So we now know that x is equal to -1.  We can simply substitute that into one of the original equations to find y:

2y = 3x - 5\\2y = 3(-1) - 5\\2y = -3 - 5\\2y = -8\\y = -4

We now know that x is equal to -1, and y is equal to -4.  We can also check our answer by plugging that -4 into the other equation, and see if we still get -1:

9x - 2y = -1\\9x - 2(-4) = -1\\9x + 8 = -1\\9x = -1 - 8\\9x = -9\\x = -1

So we know that our answer is correct.

3 0
3 years ago
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