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suter [353]
3 years ago
12

9x-2y=19 7x=21 can you please help me answer this question

Mathematics
1 answer:
avanturin [10]3 years ago
3 0
We have such system of eq
\left \{ {{9x-2y=19} \atop {7x=21}} \right.
First lets solve second eq
7x=21   /:7   divide both sides by 7
x=3
Now we can substitute it to first equation
9x-2y=19
9*3-2y=19
27-2y=19    /-27 subtract 27 both sides
-2y=-8     /:(-2)  divide both sides by -2
y=4 - its the answer

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Answer:

C

Step-by-step explanation:

Hello There!

so

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3 years ago
Sir Ving Spoon earned $5,436 on his $7,550 certificate of deposit. If he had the CD for 12 years, what simple interest rate did
Lilit [14]

6% or 0.06 is the simple interest rate the bank pays him.

<u>Step-by-step explanation:</u>

Sir Ving Spoon earned $5,436 on his $7,550 certificate of deposit.

From this given information,

It can be determined that the Principal amount is $7550 and the interest amount is $5436.

The CD is for 12 years. Therefore, the number of years is 12.

<u>To find the interest rate (r) :</u>

Using the simple interest formula,

Interest = P×r×t

where,

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  • r is the rate of interest.
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⇒ 5436 = 7550 × r × 12

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⇒ r = 5436 / 90600

⇒ r = 0.06

Multiply by 100 to represent in rate %

⇒ r = 0.06 × 100

⇒ r = 6%

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5 0
3 years ago
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Answer:

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Step-by-step explanation:

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A very simple example problem to satisfy the required above is,
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To answer this item, one needs to subtract the number of apples from the number of oranges. This is as shown below,
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