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lutik1710 [3]
3 years ago
9

Can you help me answer these questions

Mathematics
1 answer:
Ray Of Light [21]3 years ago
7 0
1 is right
2 is C
And 3 is right
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Evaluating Algebraic Expressions
koban [17]
D + t = total earnings
$3h + t = total earnings
$3h + $22 = total earnings

Fill in h as however many hours she is working.
Example: She worked for 8 hrs and got $22 in tips.
$3(8) + $22 = ?
$24 +$22 = $46
6 0
3 years ago
Please help me I really need help
Oliga [24]

Answer:

Step-by-step explanation:

(1) 2x - 6y = -12

(2) x + 2y = 14

There is a -6y and a +2y. Since they have opposite signs, I'll try to eliminate the y terms. (That's my choice. There is more than one way to solve these.)

Multiply eq. (2) by 3:

3x + 6y = 42

Then add the result to eq. (1) to eliminate the y terms:

2x - 6y = -12

3x + 6y = 42

------------------

5x   = 30,  so x = 6

Now plug the value of x into eq. (2) and solve for y:

6 + 2y = 14

2y = 8

y = 4

Why did I use eq. (2) to solve for y? Because it's less work. I could have used eq. (1) instead:

2(6) - 6y = -12

12 - 6y = -12

-6y = -24

y = 4

More than one way to solve.

5 0
3 years ago
Find the product of (2a + 3b) (2a + 3b) using identities​
Step2247 [10]

Answer:

4a^2 + 12ab + 9b^2.

Step-by-step explanation:

Use the identity (a + b)(a + b) = a^2 + 2ab + b^2 :

So

(2a + 3b)(2a + 3b)

= (2a)^2 + 2*(2a)(3b) + (3b)^2

= 4a^2 + 12ab + 9b^2.

7 0
3 years ago
Show your work on a separate sheet of paper then choose one answer choice.<br> 5x - 7 = 4x - 1?
Anestetic [448]

Answer:

x= 6

Step-by-step explanation:

Isolate all variables on their own and numbers on the other

5x -4x +7-7  = -1 +7 +4x -4x

5x -4x = -1+7

Solve for x

x = 6

8 0
3 years ago
To find the value of the following expression,which operation should you do first and solve the problem following PEMDAS. The ex
Ymorist [56]
Add the 7 and 4, which =11.
multiply times the 5, =55
and 20-55= -35
8 0
3 years ago
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