Mathematics High School

if f(x)=x²-18x+91, solve for x when f(x)=10​

Answers

Answer 1

Answer:

x = 9

Step-by-step explanation:

x²-18x+91 = 10

x²-18x+81 = 0

(x-9)(x-9)= 0

x = 9

check:

9² - 18 (9) + 91

81-162+91 = 10

Related Questions

1. A jar contains 10 marbles, 6 marbles are red, and 4
marbles are blue. If 2 marbles are chosen one at a time
with replacement, what is the probability that the first
marble will be blue and the second marble will be red?
A 1/10
B.6/100
D. 1/25
Independent or Dependent?
Final Answer:

Answers

Answer:

1/20

Step-by-step explanation:

trust me............or not...jk its either 1/20 or 1/2 NO its 1/20

Please I need help here

Answers

Answer:

a

Step-by-step explanation:

Complete this sentence: The sign of a positive number divided by a negative number is always ____________________.

Answers

Answer:

Step-by-step explanation:

Negative

SOMEONE PLEASE HELP ME T-T
Shania has 12 coins in her pocket. Of these coins, 5 are pennies and 7 are dimes. Shania randomly selects one coin from her pocket and, without replacing it, selects another coin from her pocket. What is the probability that both coins are dimes?

Answers

Answer:

10/12

Step-by-step explanation:

Answer:

10/12

Step-by-step explanation:

HELP
HELP
ITS HARD
pls pls pls pls pls

Answers

you have to do the amount of hay one horse can eat times by how many horses there are. then you have to do that times the amount of days to see how much hay they ate overall. so that’s 21x20x14, which is 21(20x14) and that equals 5880. so the answer is C and the blank is 5880. hope this helps!


Solve each problem. Explain or show your reasoning.
What is 25% of 160?
What is 39% of 200?
What is 150% of 32?
13 is 50% of what number?
18 is 120% of what number?
21 is what percentage of 30?
I NEED HELP

Answers

1: 40 2: 78 3: 48 4: 26 5: 15 6: 70

What is the area of this triangle?

A=bh2

17 m²

30 m²

60 m²

120 m²

Answers

Answer:

120

Step-by-step explanation:

alls you do is plug in the numbers its not hard sweetie

Answer:

120 m2

Step-by-step explanation:

I took the test hope this helps

Vhich of the equations below represents a line parallel to the x-axis?
A. y = 3
B. y = X
C. y = 1/x
D. x = 3

Answers

I think it’s B, y=X. Hope it works
The answer is A. y=3

help please, I'll give brainliest :< to whoever can answer and give the solutions​

Answers

Answer:

3. Fifteen weeks

Step-by-step explanation:

well if you subtract the 4000 from the 10000 you get 6000 and then divide 6000 by the 400 and you get 15

Right answer gets brainlist

Answers

Answer:

2057

Step-by-step explanation:

Maria sells a motorcycle for $5,000 and a car for $25,000. What is the total commission that she will earn on the sale of these two vehicles?

Answers

Maria will make 10% on 5,000 for the motorcycle and 15% on 25,000 for the car she sold

Joseph is saving his money. He currently has $5, and his dad gives him $2 each week. Which type of function would best represent?

Answers

Answer:

d) linear

Explanation:

Since Joseph is always getting the same amount of money the function will be linear.

Factorise fully
10z -80​

Answers

Answer:

10(z-8)

Step-by-step explanation:

if you have to factor you have to have something like

number *number or number* parenthesis

10z - 80 is number *number -number so change

10 *(z-8)

The answer should be 10 ( z-8)

PLIS HELPPP I DON'T UNDERSTAND THIS

Answers

Answer:

Step-by-step explanation:

7 blue socks and 6, 5, 8 of non-blue socks. If you add the numbers of non-blue socks you get 19. Blue socks to non-blue would be 7:19

Answer:

The ratio is 7 to 19 or 7:19

Step-by-step explanation:

Since there are 7 blue socks and other colors are not blue we add the number of other colors. So basically 8+5+6= 19 and then 7 blue socks :)

Will give Brainliest!!!
What is the y=mx+b of the equation 5x−2y=16

Answers

Answer:


Y= 5/2 x - 8







Someone please help and make sure it’s right I have an f right now :(

Answers

Try 40-8 if not then have a guess

Someone please help me quick I’m timed

Answers

It’s c because the x is exterior angles

PLEEASEEE HELP ME NOONE WILL HELP ME PLEASE HELP ME

Answers

Answer:

63.97 sheets of paper

Step-by-step explanation:

40-18.25 = 21.75

21.75 divided by 0.35 = 63.97

What is the answer to y + 6 = 20

Answers

Answer:

y=20-6=14

Step-by-step explanation:

14 is the answerrrrrr...

Slove (3x-2)=(2x-1)/(2) show step by step

Answers

Answer:

x= 3/4

Step-by-step explanation:

[tex](3x - 2) = \frac{(2x-1)}{2}[/tex]

2(3x - 2) = (2x - 1)

6x - 4 = 2x -1

4x = 3

x= 3/4

Answer:

x=3/4

Step-by-step explanation:

Remove parentheses.

3x-2=\frac{2x-1}{2}3x−2=22x−1

Multiply both sides by 22.

6x-4=2x-16x−4=2x−1

Add 44 to both sides.

6x=2x-1+46x=2x−1+4

Simplify  2x-1+42x−1+4  to  2x+32x+3.

6x=2x+36x=2x+3

Subtract 2x2x from both sides.

6x-2x=36x−2x=3

 

Simplify  6x-2x6x−2x  to  4x4x.

4x=34x=3

 

Divide both sides by 44.

x=\frac{3}{4}x=43

Which of these cannot represent the lengths of the sides of a right triangle?


A.)3 ft, 4 ft, 5 ft
B.)6 in., 8 in., 10 in.
C.)16 cm, 63 cm, 65 cm
D.)8 m, 9 m, 10 m

Answers

D because it is talking about meters hope this helps
D can’t represent the sides of a right triangle

(4 + 2n) + (513 + 2).

Answers

Answer:

2n + 519

Step-by-step explanation:

Hope this helps! :)

Good luck♥

what does 3x+8+9x^2 equal?

Answers

Answer:

Stays the same. OR Standard form: 9x^2+3x+8

Step-by-step explanation:

You can't factor it. When you add them it's the same bc, you can't combine anymore like terms. let me know if this helps at all? What is your objective? Tryna factor? Add polynomials? ???

What is an algebraic expression for ​"41 more than y ​"?

Answers

All you have to do is add the number to the variable you need to. It works the same for subtraction instead you will put y-14 or any variable and number that is needed to subtract from it and remember when they say a number more than a variable it is + that number if they say a number less than a variable it is - that number .


y+14

What is the slope intercept ?

Answers

Answer:

y=mx+b

Step-by-step explanation:

that is the equation

what is the area of the figure below?

Answers

109 inches is the answer! multiply the sides

a circle has an area of 80 square centimeters. which answer is the closest to the measure of its radius?​

Answers

Answer:

the answer is 5 cm

Step-by-step explanation:

because of substitution.

80=pi*r^2

Please help it’s very a grade I Will give you Brainly if right

Answers

It either C or D for sure

use the distributive property to find two expressions that are equivalent to 7(3x - 4)

please help me i cant do this anymore, i'm having a panic attack and this is all due in 4 hours

Answers

I could only figure out one... sorry! Good luck

The answer is: 21x-28

The quotient of a number and two is increased by seven. The result is eleven. What is the number?

9
2
8
1

Answers

Answer:

C

Step-by-step explanation:

8 is the correct answer.

Answer:

8

Step-by-step explanation:

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