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sergejj [24]
3 years ago
11

What is the substitution for 5x+2(8-4x)=7

Mathematics
1 answer:
lidiya [134]3 years ago
7 0

Answer:

x=3

Step-by-step explanation:

5x+2(8-4x)=7

multiply parentheses by 2

5x+16-8x=7

collect like terms

-3x+16=7

move constant to right

3x=7-16

calculate

-3x=-9

divide both sides by -3

x=3

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Write the equation of the axis of symmetry for f(x)=-x^2+4x-3
Rudik [331]

Answer:

x= -10

Step-by-step explanation:

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2 years ago
What is the equation of the line is perpendicular to the given line and passes through the point (3,4)?
kolbaska11 [484]

Answer:

y = 3x-5

Step-by-step explanation:

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6 0
3 years ago
Plz this is due today help me explain the answer
Natali [406]

Answer:

177.3 feet

This is a classic find the vertex of a parabola question.

if this was a calculus class the solution would be to take the derivative and set it equal to zero... -32t+ 105 = 0

BUT i assume that you are not in a calculus class..

so we try plan "B" the  highest (or lowest) point of parabola is it's vertex

the vertex formula is [-b/2a,f(-b/2a)]

in your problem a = -16, b=105, c= 5

so the "X" (TIME) is located at -(105)/(2*-16) = 3.28

plug in 3.28 into -16(3.28)^2 + 105(3.28) + 5 = 177.27

and you will get

Step-by-step explanation:

4 0
3 years ago
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