All categories

3 years ago

If f(x) = 5x + 40, what is f(x) when x = –5? –9 –8 7 15

2 answers:

5 0

Hi,

$f(x)=5x+40\\\\f(-5)=5\times(-5)+40=-25+40=15\\f(-9)=5\times(-9)+40=-45+40=-5\\f(-8)=5\times(-8)+40=-40+40=0\\f(7)=5\times7+40=35+40=75\\f(15)=5\times15+40=75+40=115$

scoray [572]3 years ago

4 0

The Answer is 15. You're welcome kidz

You might be interested in

At higher elevations water boils at lower temperatures. The temperature at which water boils is called the boiling point of wate

Irina-Kira [14]

Answer:

The boiling point of water is between 84 °C and 88 °C when the elevation is between 3.4 and 4.6 km.

Step-by-step explanation:

You want x such that ...

84 ≤ B(x) ≤ 88

84 ≤ 100 -3.5x ≤ 88 . . . . substitute for B(x)

-16 ≤ -3.5x ≤ -12 . . . . . . . .subtract 100

4.6 ≥ x ≥ 3.4 . . . . . . . . . . .divide by -3.5; this reverses the inequality

4 0

2 years ago

Write the expression x^-5 in positive exponential form Answer for brainliest!

vladimir1956 [14]

It's 1/x^5

Hope it helps

8 0

2 years ago

Read 2 more answers

You work at a bike shop. A customer purchases 6 new bike tires at $6.99 each. If the customer gives you $40, how much is still o

Mariulka [41]

Answer:

194 cents is the correct answer

Step-by-step explanation:

6.99 dollars is 41.94

7 0

3 years ago

Read 2 more answers

The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The mon

kkurt [141]

The monthly cost will be $17.14

Step-by-step explanation:

Given that the monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes) then this can be presented in a table form as;

Time in minutes (x) Cost in dollars (y)

50 $12.55

102 $ 17.23

Take the values as ordered pairs to represent coordinates for points that satisfy the linear function

(50,12.55) and (102,17.23)

Finding the slope of the graph using these points

slope,m=Δy/Δx

m=Δy=17.23-12.55 =4.68

Δx=102-50=52

m=4.68/52 =0.09

Finding the equation of the linear function using m=0.09, and point (50,12.55)

m=Δy/Δx

0.09=y-12.55/x-50

0.09(x-50)=y-12.55

0.09x-4.5=y-12.55

0.09x-4.5+12.55=y

y=0.09x+8.05

So for 101 minutes , the cost will be;

y=0.09*101 +8.05

y=9.09+8.05 = $17.14

Learn More

Linear functions : brainly.com/question/11052356

Keyword : linear function

#LearnwithBrainly

5 0

3 years ago

What is the ratio of girls to boys if there are 15 girls and 5 boys?

WINSTONCH [101]

The answer is 15 : 5

because In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second. For example, if a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ratio 4:3).
And you said girls : boys

That means 15 : 5 or 15 to 5

8 0

3 years ago

Read 2 more answers