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fredd [130]
3 years ago
13

Factor and solve X^2+7x-8=0

Mathematics
1 answer:
adelina 88 [10]3 years ago
4 0
(X^2+8x)-(x-8)=0
x(x+8)-1(x+8)=0
(X-1)(x+8)=0
X= 1
X= -8
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People use water to​ cook, clean, and drink every day. An estimate of 33.9​% of the water used each day is for cooking. If a fam
Lady_Fox [76]

Answer:

23 gallons of water

Step-by-step explanation:

People use water to​ cook, clean, and drink every day. An estimate of 33.9​% of the water used each day is for cooking. If a family uses 67.8 gallons of water a day for cooking​, how many gallons do they use every​ day?

This is calculated as:

33.9 % × 67.8 gallons of water

= 0.339 × 67.8 gallons of water

= 22.9842 gallons of water

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Therefore, 23 gallons of water are used everyday for cooking

5 0
3 years ago
What is the rule help I’m to stupid
aalyn [17]

Answer:

2/24

5/60

7/84

10/120

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3 0
4 years ago
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OLga [1]

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Step-by-step explanation:

8 0
3 years ago
One month the family decides to shop around for "best buys" at different supermarkets
Triss [41]

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5 0
3 years ago
Solve the system of equations and choose the correct ordered pair 4x - 2y + 7 =33 and 5y=3x-30
Kay [80]
1. Solve for x in 4x-2y+7=33
4x-2y+7=33
4x+6=33+2y
4x=33+2y-7
4x=2y+26
x=(2y+26)/4
x=(2(y+13))/4
x=(y+13)/2

2. Substitute x=(y+13)/2 into 5y=3x-30
5y=3x-30
5y=3*(y+13)/2 -30
5y=(3(y+13))/2 - 30

3. Solve for y in 5y=(3(y+13)/2 -30
5y=(3(y+13))/2 - 30
10y=3(y+13)-60
10y=3y+39-60
10y=3y-21
10y-3y=-21
7y=-21
y=-21/7
y=-3

4. Substitute y=-3 into x=(y+13)/2
x=(y+13)/2
x=(-3+13)/2
x=5

5. Therefore, 
x=5 and y=-3

I hope you have a nice day :D
4 0
3 years ago
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