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frosja888 [35]
2 years ago
6

When f(x) = 7x^2 - 2x + 4, evaluate f(-1) f(-1) =

Mathematics
1 answer:
Blizzard [7]2 years ago
5 0

Answer:

13

Step-by-step explanation:

do u want me to elaborate on how I found it>

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Joshua rolls two dice to form a two-digit
dusya [7]

Answer:

fits under statistics category (also probability or math :\)

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3 years ago
Maria practice the piano 5/6 of an hour everyday. How many hours does she practice in 4 days
S_A_V [24]
Answer:
10/3 hours

Explanation:
If Maria practices 5/6 hours a day, then she practices (5/6)(4) hours in 4 days.

(5/6)(4)=20/6

20/6 can be simplified to 10/3 hours.

I hope this helps!
3 0
2 years ago
8 more questions!<br><br>Please help, thanks
Allushta [10]

Problem 7 is choice B, which is the entire number line shaded in but the value -4 has a hole at this location to mean "exclude this point from the solution set". So basically x can be any number but -4.

Problem 8 is choice C. You have a closed circle (or filled in hole) at -1.5 on the number line. Then you shade to the left of the closed circle to indicate the set of values that are smaller than this endpoint. So n can be -1.5 or it can be smaller than -1.5 (something like -2 or -3, etc).

5 0
3 years ago
USE FOR ALL PROBLEMS: You are comparing two cell phone plans. Xfinity offers
mr Goodwill [35]
It would be xfinity because your spending only $45 but on t mobile your spending $75
3 0
3 years ago
Read 2 more answers
The equation 3sinx+cos^2x=2 is solved below<br> Please help! Thanks!
Kay [80]
We have that
3sin x+cos²<span>x=2
</span>3sin x+(1-sin²x)<span>=2
</span>-sin²x +3sin x=1
sin²x -3 sin x+1=0---------> up to here the procedure is correct
let
A=sin x
then
A²-3A+1=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

(A²-3A)=-1

Complete the square. Remember to balance the equation by adding the same constants to each side.

(A²-3A+2.25)=-1+2.25

Rewrite as perfect squares

(A-1.5)²=1.25

(+/-)(A-1.5)=1.12

first solution

(A-1.5)=1.12--------> A=1.12+1.5-----> A=2.62-----> sin x=2.62

second solution

-(A-1.5)=1.12----> -A+1.5=1.12----> A=1.5-1.12----> A=0.38---> sin x=0.38

the answer is

the equation was factored incorrectly

8 0
3 years ago
Read 2 more answers
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