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Mazyrski [523]
3 years ago
12

F(x) = 3x2 + 5x – 14 Find f(-9 )​

Mathematics
2 answers:
Alex777 [14]3 years ago
8 0

Answer:

\huge\boxed{f(-9) = 184}

Step-by-step explanation:

f(x) = 3x^2 +5x-14

Put x = -9

f(-9) = 3(-9)^2+5(-9)-14\\f(-9) = 3(81) -45-14\\f(-9) = 243-45-14\\f(-9) = 198-14\\f(-9) = 184

Nonamiya [84]3 years ago
6 0

Steps to solve:

f(-9) = 3(-9)^2 + 5(-9) - 1

~Solve using PEMDAS

f(-9) = 3(81) - 45 - 1

f(-9) = 243 - 45 - 1

f(-9) = 198 - 1

f(-9) = 197

Best of Luck!

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Solve the system by substitution.<br> -2y - 10 = x<br> - 10x - y = -14
masya89 [10]

Answer:

x=2 and y=−6

sorry this is pretty long, I did not know if you needed the steps or not

Step-by-step explanation:

−2y−10=x;−10x−y=−14

Solve−2y−10=x for x

−2y−10=x

−2y−10+−x=x+−x

−x−2y−10=0

−x−2y−10+2y=0+2y

−x−10=2y

−x−10+10=2y+10

−x=2y+10

-x/-1=2y+10/-1

x=−2y−10

Substitute−2y−10 for x in−10x−y=−14

−10x−y=−14

−10(−2y−10)−y=−14

19y+100=−14

19y+100+−100=−14+−100

19y=−114

19y/19=-114/19

y=-6

Substitute−6 for y in x=−2y−10

x=−2y−10

x=(−2)(−6)−10

x= 2

x=2 and y=−6

6 0
3 years ago
90 Points!! PLEASE MAKE SURE THE INORMATION IS CORRECT THAT YOU GIVE ME!
jekas [21]

Answer:

They bought 23 tickets for children and 52 for adults.

Step-by-step explanation:

So first you must find what i represents so here it is

A= Adult

C= Children

They both sold the tickets which is going to be

A + C = 75

Now here it shows

12= each adult ticket

8= each children ticket

find the equation like this 12 A + 8C = 808

Now to find the C

You can find by resolving it like this

C= 75 - A

Solve the A and C

4A = 208

A = 52

12 (52) + 8C = 808

624 + 8C = 808

Children = 23

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8 0
3 years ago
Find the measure of Angle 8
Nataliya [291]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

  • Angle 8 = 99°

Since they form corresponding Angle pair ~

5 0
2 years ago
Jordan ran 2/3 of a mile. Jackson
Alex_Xolod [135]

Answer:

Jackson ran 5/24 miles further than him

Step-by-step explanation:

7/8-2/3 = 21/24 - 16/24 = 5/24 miles or approx. 0.208 miles further than him

6 0
3 years ago
Find the area of this triangle
just olya [345]

Answer:

can't

Step-by-step explanation:

we need to have the height

8 0
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