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Bad White [126]
3 years ago
13

Simplify the expression: 3(2x2 + 7x + 4) - 8x2 + 15

Mathematics
1 answer:
Softa [21]3 years ago
5 0

Answer:

-2x² + 21x + 27

Step-by-step explanation:

distribute 3 to get:

(6x² + 21x + 12) - 8x² + 15

combine 'like terms' to get:

-2x² + 21x + 27

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3 years ago
What is the equation of a line perpendicular to y=-2/5X-1 that passes through (2,-8)
AysviL [449]

Answer:

y=\frac{5}{2}x-13

Step-by-step explanation:

Given the equation

y=-\frac{2}{5}x-1

comparing the equation with the slope-intercept formy=mx+b

Here,

  • m is the slope
  • b is the intercept

so the slope of the line is m = -2/5

As we know that the slope of the perpendicular line is basically the negative reciprocal of the slope of the line,

so  the slope of the perpendicular line will be: 5/2

Therefore, the point-slope form of the equation of the perpendicular line that goes through (2,-8) is:

y-y_1=m\left(x-x_1\right)

y-\left(-8\right)=\frac{5}{2}\left(x-2\right)

y+8=\frac{5}{2}\left(x-2\right)

subtract 8 from both sides

y+8-8=\frac{5}{2}\left(x-2\right)-8

y=\frac{5}{2}x-13

8 0
3 years ago
Make a number line for 42+59
yuradex [85]

Answer:42 + 59 is 101


Step-by-step explanation: so draw the line for the number line and mark it by tens by going 10 20 so on and so on then do 4 of the ten hops and and 2 tiny hops then get a diffrent color pencil and do the number 59 in jumps


7 0
3 years ago
I need help with this please help me
AveGali [126]
Sorry i cant help you sorry
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3 years ago
The table shows the predicted growth of bacteria after various numbers of hours. Write an explicit formula for the number of bac
frez [133]

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Step-by-step explanation:

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