All categories

3 years ago

If f(x) = 3x - 2 then f (8) - f(-5)=

Mathematics

1 answer:

Vilka [71]3 years ago

7 0

F(8) = 3(8) - 2 = 22
f(-5) = 3(-5) - 2 = -17
so....
f(8) - f(-5) = 22 - -17 = 39

You might be interested in

What is the domain of the function y=3 In x graphed below?

8_murik_8 [283]

Answer:

x>0

Step-by-step explanation:

points exist on the right of the graph so the domain is x>0

4 0

2 years ago

The quadratic model f(x)=-5x^2 +200 represents the approximate height, in meters, of a ball x seconds after being dropped. The b

mel-nik [20]

Answer:

Third option: 5.48

Step-by-step explanation:

Given the quadratic model that represents the approximate height in meters of the ball $f(x)=-5x^2 +200$ . the time in seconds x, when the ball is 50 meters from the ground can be calculated by substituting $f(x)=50$ and solving for x.

Then:

$50=-5x^2 +200$

Subtract 200 from both sides:

$-200+50=-5x^2 +200-200\\-150=-5x^2$

Divide both sides by -5:

$\frac{-150}{-5}=\frac{-5x^2}{-5}\\30=x^2$

Apply square root to both sides:

$\sqrt{30}=\sqrt{x^2}\\\sqrt{30}=x\\5.48=x$

The ball is 50 meters from the ground after about 5.48 seconds.

3 0

4 years ago

DUE IN 5 MINUTES MATH QUESTION

kumpel [21]

Answer:

x= -10

Step-by-step explanation:

So because the angle 55 is part of the same line as one of the unknown angles you can do 180-55 to find that first angle at the top, which is 125.

Next add all three angles (125 + x + 35 + x + 40)=180

Combine the x values to get 2x and subtract the three values from 180

Then 2x= -20, x should be equal to -10

You can plug x back into the values and check your work by adding all the values again, making it all equal to 180 degrees again

4 0

3 years ago

A map has a scale of 1cm:20 km two cities are 2.5 cm apart on the map to the nearest tenth of a kilometer what is the actual dis

Aleksandr-060686 [28]

Answer: 50 km

Step-by-step explanation: So the map has a scale of 1 cm: 20 km. Next, you look at how far they are apart and see if the scale and the distance on the map are the same measurement. In this case, they are both centimeters so they stay the same. Then, all you do is multiple the real size, 20 km, by

2.5 /1 . Then, 20 x 2.5=50. So the answer is 50 km

6 0

3 years ago

Andrea ran 400 meters in gym class How many cm. did she run

aliya0001 [1]

1 m = 100 cm

Multiply:

100 * 400 = 40000

So she ran 40,000 centimeters.

7 0

3 years ago