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3 years ago

Let f(x) = x2 − 3x − 7. Find f(−3).

Mathematics

2 answers:

puteri [66]3 years ago

8 0

Hope it helped!! :))

elena55 [62]3 years ago

4 0

Answer:

f(-3) = 11

Step-by-step explanation:

To evaluate f(-3), substitute x = - 3 into f(x)

⇒ f ( − 3 ) = ( − 3 )^ 2 − 3 ( − 3 ) − 7

= 9 + 9 − 7 = 11

hope this helps

sorry if wrong

#Virgo2007

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Alma had four ants in her ant farm. She found three more ants outside and put them in the ant farm. She wanted to know how many

olga2289 [7]

Answer:

Step-by-step explanation:

4+3=7 7x6=42

5 0

3 years ago

if f(x)=2(x)^2+5sqrt(x+2), complete the follwoing statement ( round your answer to the nearest hundreth) : f(0)=_____

Maslowich

Answer:

$f(0)=7.07$

Step-by-step explanation:

We have the function $f(x)=2(x)^2+5\sqrt{(x+2)}$

In this case we want to find the value of f0)

To find f(0) you must replace the x in the function with the number 0 and solve as shown below

$f(0)=2(0)^2+5\sqrt{(0+2)}$

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4 years ago

The length of a rectangle is 4 yd more than twice the width x. The area is 390

masya89 [10]

Step-by-step explanation:

step 1. let l be the length of the rectangle

step 2. l = 2x + 4

step 3. lx = 390 yd^2

step 4. (2x + 4)x = 390

step 5. 2x^2 +4x = 390

step 6. 2x^2 + 4x - 390 = 0

step 7. -4 +- sqr(4^2 -4(2)(-390))/2(2) quadratic formula

step 8. (-4 +- sqr(3136))/4

step 9. (-4 +- 56)/4

step 10. x = 13yd, l = 2x + 4 = 2(13) + 4 = 30yd.

3 0

3 years ago

Please answer question no 2 only

Zielflug [23.3K]

Answer:

27 = 3 = 18 = 54

36 4 24 72

Step-by-step explanation:

27÷3=9 (WHAT YOU DO TO THE TOP YOU HAVE TO DO TO THE BOTTOM)

36÷9=4

24÷4=6 (WHAT YOU DO TO THE TOP YOU HAVE TO DO TO THE BOTTOM)

6×3=18

54÷18=3 (WHAT YOU DO TO THE TOP YOU HAVE TO DO TO THE BOTTOM)

24×3=72

7 0

3 years ago

Is the open sentence 3z = 2z +5 true or false when z=5?

11111nata11111 [884]

If 3z=2z+5 and z=5, then you’d just plug the 5 in.

3(5)=2(5)+5 —> 15=10+5 —> 15=15

This statement is TRUE because 15 does equal 15.

I hope this helps. :)

8 0

4 years ago