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Marta_Voda [28]
3 years ago
13

Solve the system of equations using the substitution method.

Mathematics
1 answer:
valentina_108 [34]3 years ago
5 0
Multiply 3x +y =23 by -4

x+4y=4
-12x+(-4y)=-92

Add together

-11x = -88

x = 8

Plug x in to find y.

8 + 4y = 4

Subtract 8 from each sides

4y = -4

Divide by 4

y = -1

So the answer is x =8, y= -1

I hope that helps!
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LUCKY_DIMON [66]

Answer:

The measure of angle s is 75 degrees

Step-by-step explanation:

7x+40+8x+25+5x+15=180

20x+80=180

20x=100

x=5

7*5+40=75

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If 1.6 cup of icing cover 2.3 of a cake then how much icing is need to cover the entire cake
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1/6 * 3/2 = 1/4
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Line segment AB is translated 5 units right and 2 units down followed by a rotation of 180o about the origin. The resulting imag
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Read 2 more answers
Angelica's salary this year is 14% higher than it was four years ago. If she earns $46,170.00 this year, what did she earn four
Alona [7]

Answer:

D. $39,706.20

Step-by-step explanation:

In this problem, you are subtracting 14%. A way you could do this is buy finding 14% of $46,170.00, then subtracting that from itself. Or instead, you could find 86%. This works because its like your subtracting 14% from the whole 100%. so 100 - 14 = 86.

Method 1:

$46,170.00 x 0.14 = 6463.8

$46,170.00 - 6463.8 = 39706.2

Method 2:

100 - 14 = 86

$46,170.00 x 0.86 = 39706.2

either way the answer is still correct. i hope this make sense and that it helps you!

5 0
2 years ago
10.12 divided by 4.4 show work
strojnjashka [21]

Answer: 2.3

Step-by-step explanation:

10.12 move the decimal twice so its 1012 and do the same for 4.4 but add a zero at the end because u one one number after decimal point. then divide 1012/ 440 = 2.3

7 0
2 years ago
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