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Tom [10]
4 years ago
5

Can someone help me and tell me the steps plzz​

Mathematics
1 answer:
adell [148]4 years ago
5 0

Answer:

A

Step-by-step explanation:

f(x) = 7x² - 15x + 2

A) f(1) = 7*1² - 15*1 +2 = - 6

f(1.5) = 7*(1.5)² -15*1.5 + 2 = - 4.75

B) f(2.2) = 7*(2.2)²-15*(2.2)+2 = 2.28

C) f(1) = 7*1² - 15*1 +2 = - 6

f(1) = 7*2² - 15*2 +2 = 0

D) not for all real numbers because we already have

f(2.2) = 7*(2.2)²-15*(2.2)+2 = 2.28 that is positive.

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Help with this question please 10 points​
Mamont248 [21]

Answer:

x = 80

measure of exterior angle = 112°

Step-by-step explanation:

32 + x = 2x - 48 (because the measure of exterior angle is equal to the sum of the two interior angles)

32 + x = 2x - 48

32 = x - 48

x = 80

plug in,

2(80) - 48

160 - 48 = 112

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3 years ago
A transit company carries about 80 000 riders per day for a fare of $1.25. To obtain more revenue, the management plans to incre
Hatshy [7]
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Write an equation of a line that passes through point (5, 3) and is perpendicular to the line 2y = 5x – 8.
anastassius [24]

Answer:

y= -2/5+5

Step-by-step explanation:

A line must always be written in the form y= and the line given is not. Dividing both sides of the equation by 2 you get y=5/2x-4. This is the equation of the line given.

Perpendicular line have gradients that, when they are multiplied, they are equal to -1

The line given multiplied by the gradient of the line(the one required to find)= - 1. That is 5/2×line= -1.

Dividing both sides of the equation by 5/2 you'll get - 2/5. This is the gradient of the line required.

Using the general formula y=mx+c substitute the gradient into the equation. You'll get something like this y= -2/5x+c.

Substitute the given point into the equation. You'll get something like this 3= -2/5(5)+c.

Calculate the value of c. You'll get c=5.

Substitute the value of c into the original equation. You'll get something like this y= -2/5+5

This is the equation: y= -2/5+5

7 0
3 years ago
Help I me I will benefit give you brainlest
yan [13]
3 and 2/5 my explanation is because I know
5 0
3 years ago
Which statements are true?
Karolina [17]
A.\\-13+25=10+(-22)\\\\L=25+(-13)=25-13=12\\R=10-22=-12\\\\L\neq 
R\\\\B.\\10+(-6) > 31+(-19)\\\\L=10-6=4\\R=31-19=12\\\\4 > 
12-false

C.\\8+(-12) < -17+14\\\\L=8+(-12)=8-12=-4\\R=-17+14=-3\\\\-4 < -3\ TRUE

D.\\-11+(-15) > 6+(-29)\\\\L=-11+(-15)=-26\\R=6+(29)=6-29=-23\\\\-26 > -23-false

Answer:\boxed{C}

4 0
3 years ago
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