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3 years ago

Evaluate the expression 2a + 3b + 6 when a=2 and b=4

Mathematics

1 answer:

Vitek1552 [10]3 years ago

5 0

Answer:

22 or 4+12+6

Step-by-step explanation:

Since A is equal to 2, times 2 by 2 and get 4

Since B= 4 you times 3 by 4 and get 12

4+12 is 16

16 plus 6 is 22

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Solve y=x^2 + 7 for x

crimeas [40]

Hello! To solve for x means to isolate x:

y = x^2 + 7
y - 7 = x^2
sqrt(y - 7) = x

Answer:
x = sqrt(y - 7)

Hope this helps!

5 0

3 years ago

Find the value of the expression (3x−12)−(12xy−10)(3x-12)-(12xy-10) for x=3x=3 and y=6y=6

Rina8888 [55]

Hi!

Put in the values for x and y.

(3 · 3 - 12)-(12 · 3 · 6 - 10)

Solve

(9 - 12)-(216 - 10)
-3 - 206
-209

The answer is -209

Hope this helps! :)

4 0

3 years ago

Read 2 more answers

After a 5% pay raise , Hermione is earning $21,000 per year. What was she earning before the pay raise?

Finger [1]

Answer:

$\$20,000$

Step-by-step explanation:

Let

x -----> Hermione was earning before the pay raise

we know that

$100\%+5\%=105\%=105/100=1.05$

The linear equation that represent this problem is

$1.05x=21,000$

Solve for x

Divide by 1.05 both sides

$x=21,000/1.05$

$x=\$20,000$

7 0

3 years ago

10 POINTS! <br> Find x and y.

ki77a [65]

Step-by-step explanation has been given below.....pls check the attachment.

PLS MARK AS BRAINLIEST!!!

HAPPY ANSWERING!!

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6 0

3 years ago

13. Vacation Kate is saving for a vacation in the Bahamas. On January 1,

jeyben [28]

Answer:

I tried P as the Principle invested: 750, i, as the interest rate per compounding period = 8.2/100 = 0.082 n, number of compounding periods = 2, and t, time is 6 (6 months before July 1 from January 1?) Because I got 1931.03 and it's wrong:

Step-by-step explanation:

4 0

2 years ago