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snow_lady [41]
3 years ago
13

-2 (3 + 5y -10) = 34

Mathematics
2 answers:
IrinaK [193]3 years ago
7 0
-2 (3+5y-10) = 34
Step 1) -6-10y+20=34
Step 2) -10y+20=40
Step 3) -10y=20
Step 4) y = -2
Answer is -2
brilliants [131]3 years ago
7 0
What I did to solve this
1. First add 10 to -10
2. Add 10 to 34
3. Minus 3 to the 3 and now 44(was 34)
4. Plus 2 to the -2 and to 41
5. 5y divided by 5 and 43 divided by 5
6. Y=8.6
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Could someone please help me with this thank you very much
elena-s [515]

Answer:

Answer for #10:

y = 2 \: and \: x = 1

Answer for #1:

x = 2 \: and \: y =  - 1

Step-by-step explanation:

In order to solve a simultaneous equation using the substitution method you have to:

Use one of the equation and substitute it into the other equation, in this case equation <em>B</em><em> </em>was substituted into equation <em>A</em><em>.</em>

<em>equ. \: a = (2x - 3y = 7) \\ equ. \: b = (x = 1 - y)</em>

Therefore since x = 1 - y, equation A would be:

2(1 - y) - 3y = 7 \\ (2 - 2y) - 3y = 7 \\  - 2y - 3y = 7 - 2 \\  - 5y = 5 \\ y =  - 1 \: and \: x = 2

8 0
2 years ago
A recipe requires 3 cups of flour to make 27 dinner rolls. How much flour is needed to make 9 rolls.
amid [387]
9 rolls* (3 cups of flour/ 27 dinner rolls)= 1 cup of flour.

1 cup of flour is needed to make 9 rolls~
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3 years ago
The tire of a car has a radius of 10.5 inches. How many rotations does the tire need to make five for the car to travel 3,297 in
yan [13]
It would be 314 because 3297/10.5 = 314
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3 years ago
Jen is a baker and she wants to make cookies. She has 3 lbs. of butter in the refrigerator. Each batch of cookies requires 3/4 p
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4 batches of cookies
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3 years ago
HEY BESTIES!! HERES SOME FREE POlNTSSSSSSSSS
Alekssandra [29.7K]

Answer:

thx :D

btw ive given 400 points xD so yeah thx

Step-by-step explanation:

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