3 years ago

Find f(-4) if f(x) =-x-5.

Mathematics

2 answers:

DochEvi [55]3 years ago

5 0

Answer:

f(-4)= -1

Step-by-step explanation:

Karo-lina-s [1.5K]3 years ago

5 0

Answer:

f(-4)=-9

Step-by-step explanation:

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Given that f(x) = 2x − 5, find the value of x that makes f(x) = 15.

Vladimir79 [104]

Answer:

Step-by-step explanation:

so you replace all the x's with 15 and it becomes

2×15-5

2×15=30

30-5=25

8 0

3 years ago

A hair salon charges a fixed rate of $25.00 for a haircut and then an additional 515 for any other services. Write a function to

V125BC [204]

Answer:

you have a fixed rate of $25, meaning you get a haircut, it's $25

ANY other service is an extra $15

So, let's make the equation...

y=15x+25

Now, to just get a haircut it's $25.

But, let's say you get a haircut+shampoo

It'd be..

y=15(1)+25

y=$40

Another one..

You get a haircut+shampoo+highlight

y=15(3)+25

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3 years ago

Which value of h make the equation true? 2.3 + h = 7.8

Nat2105 [25]

Answer:

h = 5.5

Step-by-step explanation:

2.3 + h = 7.8

-2.3 -2.3

h = 5. 5

3 0

2 years ago

Nemo's aquarium is filled with 2,4002{,}400 2,400 2, comma, 400 cubic centimeters of water. The base of the aquarium is 20 cm 20

kolezko [41]

The water in the aquarium is a rectangular prism with dimensions 20, 12 and h (where the height is unknown).

We know that the volume is the product of the dimensions, and that it is 2400, so we have

$V=2400=20\cdot 12 \cdot h \iff 240h=2400 \iff h=10$

6 0

2 years ago

Evaluate the summation of 2n+5 from n=1 to 12 29 36 216 432

rewona [7]

$\bf \sum\limits_{n=1}^{12}\ 2n+5\implies \sum\limits_{n=1}^{12}\ 2n+\sum\limits_{n=1}^{12}\ 5\implies 2\sum\limits_{n=1}^{12}\ n+\sum\limits_{n=1}^{12}\ 5
\\\\\\
2\cdot \cfrac{12(12+1)}{2}+(12\cdot 5)\implies 156+60\implies 216$

3 0

3 years ago