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Montano1993 [528]
3 years ago
10

2х - Зу = 32 x + 4у = -20 solve the system of equations

Mathematics
1 answer:
ANTONII [103]3 years ago
5 0
Answer: x=68/11 and y=-72/11


Steps:

2(x+4y=-20)

2x+8y=-40

2x - 3y = 32
- 2x + 8y = -40

-11y=72

y=-72/11


x + 4(-72/11) = -20

x - 288/11 = -20

x=68/11
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Answer:

49 baseball cards.

Step-by-step explanation:

First you want to add 5 cards to the 55 for the 5 he traded for the one. You get 60. Then subtract the 11 cards that he was given for the 1. You end up with 49 baseball cards.

8 0
3 years ago
On February 1, 1977, John deposited $2250 into a savings account paying 5.76% interest, compounded quarterly. If he hasn't made
Travka [436]
John's effective annual rate is about
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According to the "rule of 72", John's money will have doubled in
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_____
Since you're only concerned with the year (not the month), you don't actually need to determine the effective annual rate. The given rate of 5.76% will tell you 72/5.76 = 12.5 years. The actual doubling time is closer to 12.12 years, so using the effective rate gives results that are closer, but "good enough" is good enough in this case.
5 0
3 years ago
A frosting is made of cream cheese and powdered sugar in the ratio 3:2. If you use 120g or cream cheese, how much powdered sugar
siniylev [52]

Answer: 80 g

Step-by-step explanation:

Given

The frosting is made of cream cheese and Powdered sugar in the ratio of 3:2.

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So, we can write the ratio as

\Rightarrow \dfrac{3}{2}=\dfrac{120}{x}\\\\\Rightarrow x=\dfrac{2}{3}\times 120\\\\\Rightarrow x=\dfrac{2}{3}\times 3\times 40\\\\\Rightarrow x=80\ g

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3 0
3 years ago
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What is the answer to 267.9÷ 9.5?
irina1246 [14]
297.9/9.5=28.2
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Verizon [17]

Answer:

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Step-by-step explanation:

4x − 8 > 2x − 6

Subtract 2x from each side

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Divide each side by 2

2x/2 > 2/2

x >1

5 0
3 years ago
Read 2 more answers
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