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blsea [12.9K]
3 years ago
6

Help giving out 10 points

Mathematics
2 answers:
GuDViN [60]3 years ago
6 0

Answer:

32x+25

Step-by-step explanation:

(20x+28) - (-12x+3)

32x+25

Goryan [66]3 years ago
5 0
The Answer is D. because if you simplify everything and subtract the first equation to the last you get d
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What is the total cost of a $12.60 item plus 7% sales tax?
Ulleksa [173]
To take a percent, move the decimal point of the percent two places to the left. 7% = 0.07

Then multiply:

12.60 • 0.07 = 0.88

12.60 + 0.88 = 13.48

The total cost is: $13.48
5 0
3 years ago
Read 2 more answers
The quadrilateral obtained by joining the mid points of adjacent sides of a square is?​​
Anit [1.1K]

Answer:

Square

Step-by-step explanation:

the quadrilateral obtained by joining the mid points of adjacent sides of a square is a square

3 0
3 years ago
Plss help!<br>Question: Find a,b and c​
Roman55 [17]

Answer:

See below, please

Step-by-step explanation:

The right:

{(y + c)}^{2}  - b \times (x + a) \\  = ( {y}^{2}  + 2yc +  {c}^{2} ) - bx - ba  =

= {y}^{2}  - bx + 2cy +  {c}^{2}  - ab

The left:

=  {y}^{2}  - 7x - 18y + 109

So, after comparing the right side and the left side of this equation, we know

1)

b = 7

2)

2c =  - 18 \\ so \\ c =  - 9

3)

{c}^{2}  - ab = 109

So,

a =  \frac{ {c}^{2}  - 109}{b}  =  \frac{ { (- 9)}^{2}  - 109}{7}  =  \frac{ - 28}{7}  =  - 4

6 0
2 years ago
Danielle has her finals coming up and she's worried she'll fail her class. Her past 3 test grades were a 72. an 85, and a 68. Sh
natka813 [3]

Answer:

55

Step-by-step explanation:

7 0
3 years ago
Sara tried to evaluate 21 : 7 x 8 step-by-step
nlexa [21]

Answer: Sara multiplied by 3 when she should have multiplied by 8.

Step-by-step explanation:

21 : 7*8

7*8 = 56

21 : 56

The simplest form of this ratio is 3 : 8

6 0
3 years ago
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