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Stolb23 [73]
3 years ago
11

Solve by graphing. x2 2x - 8 = 0 a. –2, 4 b. 2, –4 c. 2, –4 d. –2, 4

Mathematics
2 answers:
Luba_88 [7]3 years ago
4 0
Well, to solve, garph the equation y=x^2+2x-8 and y=0
see where they intersect

anyway the easier way is to factor but anyway
0=(x-4)(x+2)


anyway

solution is x=4 and -2

A and D are answers (they are same)
Hatshy [7]3 years ago
4 0

Answer:

Option B and C are same, which are the correct answers.

Step-by-step explanation:

The given graph shows the plot for x²+2x-8=0

Here the graph crosses the x axis at points -4 and 2.

So the roots of the equations are -4 and 2

Option B and C are same, which are the correct answers.

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8 0
3 years ago
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Dahasolnce [82]

Answer:

- 10

Step-by-step explanation:

Step 1:

5 ( x - 4 ) = 7x       Equation

Step 2:

5x - 20 = 7x       Multiply

Step 3:

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Step 4:

x = - 20 ÷ 2     Divide

Answer:

x = - 10

Hope This Helps :)

5 0
3 years ago
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There are 364 first-grade students in Park Elementary School. If there are 26 more girls than boys, how many girls are there?
wlad13 [49]

Answer:

195

Step-by-step explanation:

If there are x boys, then there are x+26 girls. Hence, we write the equation,

x+(x+26)=364

Solve for x:    

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So there are 169+26 =195 girls

5 0
3 years ago
Pre-Calc :
nikitadnepr [17]
The answer is 
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5 0
3 years ago
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4 0
3 years ago
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