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2 years ago

If (x) = 3x^2+ 10, what is f(-7)?

Mathematics

1 answer:

inna [77]2 years ago

3 0

Answer:

157

Step-by-step explanation:

3(-7)² + 10

3(49) + 10

147+10

157

- Gage Millar, Algebra 2 Tutor

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Class 8 squares and square roots without adding find the sum of a) 1+3+5+7+9+11+13+15+17.

Nata [24]

Answer:

given

n=9

a=1

d=3-1=2

Step-by-step explanation:

now , by formula,

sn = n/2(2a+(n-1)d)

= 9/2(2×1+(9-1)×2)

=9/2×18

=81

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2 years ago

Solve the following equation 2/3x+6=1/2x+1/4x

Vanyuwa [196]

Answer:

x= 72

Step-by-step explanation:

combine the Xs on one side and then make the denominators the same and solve

8/12X +6 = 3/4X

sub 6 on both sides

then sub 3/4 (aka. 9/12)

-1/12X= -6

multiply by reciprocal (the fraction flip-flopped)(-12) on both sides

and you get 72

4 0

2 years ago

What is the solution of 3/x+8 =-4?<br> Ox= -72<br> O x= -66<br> O x = 58<br> O no solution

castortr0y [4]

Answer:

There is no solution the answers there is not the right answer

4 0

3 years ago

What is the standard deviation of the following data set rounded to the nearest tenth? 56 ,78 ,123 , 34, 67, 91, 20

quester [9]

Answer:

The standard deviation of the following data set is 32.2

Step-by-step explanation:

step 1

Find the mean

we have

$[56,78,123,34,67,9,20]$

Sum the data and divided by the number of elements

$[56+78+123+34+67+91+20]/7=469/7=67$

step 2

For each number: subtract the Mean and square the result

$[(56-67)^{2},(78-67)^{2},(123-67)^{2},(34-67)^{2},(67-67)^{2},(91-67)^{2},(20-67)^{2}]$

$[121,121,3,136,1,089,0,576,2,209]$

step 3

Work out the mean of those squared differences

$[121+121+3,136+1,089+0+576+2,209]/7=1,036$

This value is called the "Variance"

step 4

Take the square root of the variance

$standard\ deviation=\sqrt{1,036}=32.2$

6 0

3 years ago

Solve the equation for the variable. Make sure your answer is in simplest form.

maks197457 [2]

Answer:

Here's your answer

hope this helped you

please mark as the brainliest (ㆁωㆁ)

3 0

2 years ago

Read 2 more answers