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Lilit [14]
3 years ago
8

Evaluate f(x)=-x^2+1 for x=-3

Mathematics
1 answer:
Wewaii [24]3 years ago
8 0

For this case we have a function of the form y = f (x), where:

f (x) = - x ^ 2 + 1

We must evaluate the function for x = -3

Then we have to replace:

f (-3) = - (- 3) ^ 2 + 1\\f (-3) = - 9 + 1

Different signs are subtracted and the sign of the major is placed:

f (-3) = - 8

ANswer:

f (-3) = - 8

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I've got two of these kinds of problems and no clue how to do them, help please!
Bogdan [553]
Hello,

3x^3+2x^2-3x-2=0\\

3x^3-3x+2x^2-2=0\\


3x(x^2-1)+2(x^2-1)=0\\

(x^2-1)(3x+2)=0\\

(x-1)(x+1)(3x+2)=0\\

Sol=\{- \dfrac{2}{3}, -1,1 \}

4 0
4 years ago
Read 2 more answers
CAN SOMEONE HELP ME WITH THIS????????????????
Lerok [7]

\text{Hello there!}\\\\\text{We're trying to find the area of the shape}\\\text{We can do this by finding the area for the different shapes, then adding}\\\text{them together}\\\\\text{We can find the area of the rectangle,} \,\,84\cdot66=5,544\\\\\text{To find the area of the half circle, we would use the equation:}\,\,A=\frac{3.14r^2}{2}\\\\\text{The radius is half of the diameter, therefore it is 33. Plug 33 in r}\\\\A=\frac{3.14(33)^2}{2}\\\\\text{Solve:}\\\\A=\frac{3.14(33)^2}{2}\\

A=\frac{3.14(1089)}{2}\\\\A=\frac{3419.46}{2}\\\\\text{Divide by 2}\\\\A=1709.73\\\\\text{Since there's two half circles, we would add 1709.73 twice}\\\\\text{Add all the areas together}\\\\1709.73+1709.73+5,544=8963.46\\\\\large\boxed{\text{Area:}\,\,8963.46\,\,\text{m}^2}}

4 0
3 years ago
Find two numbers which have a sum of 132 and that can be written as the simplified<br> ratio 3:8
Molodets [167]

Answer:

96 and 36

Step-by-step explanation:

3+8 = 11

132/11 = 12

so:

12 x 3 = 36

12 x 8 = 96

5 0
3 years ago
PLEASE HELP!!
viktelen [127]

Answer:

C. The principal randomly selects homeroom classes and surveys each student in the chosen classes.

Step-by-step explanation:

Middle school is 6-8th. Surveying only the eighth-grade students won't give a representative sample of the whole school only the eighth-graders. Option A is incorrect.

Surveying only the students in detention represents a very small amount of students compared to the school, therefore it is not a representative sample. Option B is incorrect.

Yet again, the students in the math club is a small amount of students compared to the school. It does not represent the entire, or majority of the population. Option D is incorrect.

Picking students from homeroom classes and surveying each will give a wider variation of opinions from each grade and therefore a representative sample. Option C is the correct answer.

4 0
2 years ago
how do you write these equations in slope-intercept form y+1=2x-3 ,2x-3=y+1 , 2y+2=4x-6. Are they the same or different?
inna [77]

y+1=2x-3

y=2x-4

2x-3=y+1

2x-4=y

y=2x-4

2y+2=4x-6

2y=4x-8

y=2x-4

They are all the same: y=2x-4

8 0
4 years ago
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