Answer:
-9
Step-by-step explanation:
18÷x = -2
18 = -2×x
18 = -2x
-9 = x
x = -9
Answer:
-9
Step by step explanation:
it can also be written as; 18 over x is equal to -2 over 1
you cross multiply to get 18 = -2x
then multiply through with -2; 18 over -2 = -2x over -2
you cross out; -2 cancels itself and -2 goes into 18 , -9 times
Therefore; the answer is -9
Consider the function f(x) = 2x^2 - 4x + 9. Evaluate 2f(3) + 3f(-3).
Answer: 147
Step-by-step explanation:
To evaluate 2f(3)+3f(-3), we first need to find the values of f(3) and f(-3). Given f(x), we just plug in x=3, -3 into f(x).
f(3)=2(3)²-4(3)+9 [exponent]
f(3)=2(9)-4(3)+9 [parenthesis]
f(3)=18-12+9 [subtract]
f(3)=6+9 [add]
f(3)=15
Now, we find f(-3).
f(-3)=2(-3)²-4(-3)+9 [exponent]
f(-3)=2(9)-4(-3)+9 [parenthesis]
f(-3)=18+12+9 [add]
f(-3)=30+9 [add]
f(-3)=39
With the values of f(3) and f(-3), we can evaluate the expression.
2(15)+3(39) [multiply]
30+117 [add]
147
Now, we know the value is 147.
please solve both will give all points and brainiest
5
Step-by-step explanation:
Name _____________________________________ Date ______________________________Pd______
PERCENT APPLICATION
Use your understanding of percentages to complete the table below. Be sure to show your work.
Unit: Percents Homework 4
PROBLEM
PROPORTION
WORK AND SOLUTION
1. Francis heard that a car stereo system was on sale for 30% off. If the sale price was $57.75, what was the original price of the stereo?
2. Mr. Robins earns a commission on each airfare he books. At the end of the day, he had booked $208.60 worth of airfare and earned $31.29. What is Mr. Robins’ commission rate?
3. The bill at a restaurant came to $136.40. The patrons decided to leave a 15% tip. What was the total bill including tip?
4. Winter coats are marked
st
70% off on February 1 . If a
coat costs $57.75 on January 31st, how much will it cost on February 1st?
Answer the multiple choice question below.
5. At West Middle School, there are 420 students who eat lunch. The school lunch line always offers pizza on Friday’s. If 65% of students purchase pizza on Friday, then how many pizza lunches were purchased?
A. 273 B. 147 C. 83 D. 129
©Maneuvering the Middle LLC, 2016
Sally spelled 2 words incorrectly out of 20 spelling words on the test. What percent grade did Sally get on the test?
Answer:
90%
Step-by-step explanation:
So Sally gets 18/20 of the questions correct then you need to make the denominator of the fraction to 100 which makes a percent. So you multiply both the numerator and denominator by 5:
90/100
which is equal to 90%
Hope this helps!
Answer: 90%
Step-by-step explanation:
5 + 5Consider triangle ABC. Triangle A B C. Angle C is 80 degrees and angles B and A are y degrees. What is the value of y in the triangle? Angle y = °
Answer:
y=50°
Step-by-step explanation:
if all triangles add up to 180° you would subtract the angle you already know(80) from 180 which would be 100°
since there are 2 corners we dont know you would divide by 2 which would be 50°
It takes Tyreke 28 minutes to bike to his school, which is 7 miles away
If Tyreke continues to pedal at this pace, how long would it take for him to get to the soccer field, which is 8.8 miles away from school?
Answer:
35.2 minutes
Step-by-step explanation:
Time taken=28min
Distance=7miles
Speed=7/28=0.25milesperminute
Time=distance/speed
Time=8.8/0.25
=35.2 minutes
PLEASE HURRY WILL GIVE BRANLIEST!!!
I dont get this pls help
Answer:
First and second are functions, third isn't
Step-by-step explanation:
PLS GIVE BRAINLIEST
Answer:
1 and 2 are vertical
Third one is NOT
I NEED HELP PLEASE!!!!
Answer:
see attached
Step-by-step explanation:
The missing measures can be found by making use of the properties of tangents, special triangles, trig functions, and circles.
RadiiAll of the incircle radii are the same length:
CJ = CK = CL = 4
AnglesAll of the segments to the incenter from the triangle vertices are angle bisectors. Of course, the sum of angles in a triangle is 180°, and the acute angles in a right triangle are complementary.
∠CML = ∠CMJ = 20°
∠CPL = ∠CPK = 40° . . . . . (∠P = 180° -40° -60° = 80°)
∠CNJ = ∠CNK = 30°
The central angles are complementary:
∠MCL = ∠MCJ = 70°
∠PCK = ∠PCL = 50°
∠NCJ = ∠NCK = 60°
TangentsThe two tangents from a vertex are congruent. Each will be the radius divided by the tangent of the (half) vertex angle.
ML = MJ = 4/tan(20°) = 11.0
PL = PK = 4/tan(40°) = 4.8
NJ = NK = 4/tan(30°) = 6.9
Angle bisectorsThe length from each vertex to the incenter will be the radius divided by the sine of the (half) vertex angle.
MC = 4/sin(20°) = 11.7
PC = 4/sin(40°) = 6.2
NC = 4/sin(30°) = 8.0
__
Additional comment
The given dimensions are slightly off. The angle at M is 19.9831°, or the length LM is 10.9899 units, or the radius is 4.00367. In order to keep the numbers nearly consistent, we have rounded to one decimal place. The 30° triangle is the only one with an angle that has a rational trig function (sine).
HELP! I FORGOT HOW TO DO THIS!!!!
Answer: for question 11. the answer is 0.000001
Step-by-step explanation:
In a triple batch of spice mix, there are 15 teaspoons of salt and 6 teaspoons of garlic powder. how much salt is used with 8 teaspoons of garlic powder?
in a triple batch of spice mix, there are 15 teaspoons of salt and 6 teaspoons of garlic powder. how much salt is used with 8 teaspoons of garlic powder?
Answer:
2 teaspoons
Divide 15 by 5:
15/5 = 3
Divide 6 by 3:
6/3 = 2
Thus, there are 2 teaspoons of garlic powder used :)
Hope this helps
Which equation is linear?
A) [tex]y=4/x-2[/tex]
B) [tex]y=x-3/4[/tex]
C) [tex]y=2x^2-10[/tex]
D) [tex]y=2x(x-4)[/tex]
Answer:
B
Step-by-step explanation:
the way that i was taught was that if you want to find out if a equation is linear is if you it cant have an exponential in it equation and it cant be a fraction and cant have a parenthesis(for the beginning it cant be a fraction or have a exponent.
HELPPPP look at image
Answer:
She is wrong because each our, she earns 8$. 3 hours would give her $24 and another half-hour would give her 4 more dollars which would bring her to $28
Step-by-step explanation:
Find a linear inequality that contains the points (1,0) and (-5, -2)
Answer:
-5
Step-by-step explanation:
Answer:
-5
Step-by-step explanation:
ill give brainliest and 25 points to whoever makes me laugh
Answer:
Sorry mam Bin laden is not in the mood of joke today hope jeff bezus would do that for you
Answer:
Today at the bank, an old lady asked me to help check her balance. So I pushed her over.
Step-by-step explanation:
I’ve asked 3 times and no one knows pls helpahh
Explanation:
The two angles shown combine to 180 degrees because the angles form a straight line.
(3x+18)+(4x+15) = 180
7x+33 = 180
7x = 180-33
7x = 147
x = 147/7
x = 21
Harry was given an assignment. He had 42 days to get 336 tasks done at work.
Which operation would he use to figure out how many tasks he needs to complete each day?
NEED HELP I WILL MARK BRAINLIEST!!! AN EXPLANATION APPRECIATED !! HURRY
Answer:
A. Natural numbers
B. Whole numbers
C. Integers
D. Rational numbers
E. Irrational numbers
Step-by-step explanation:
Sorry, but I don't know how to explain it. If you need help, I suggest searching it up on Google.
Sorry :(
Which discovery by astronomer Vera Rubin helped prove the existence of dark matter?
HELP MEEEH :c
Galaxies exist outside of the Milky Way.
The expansion of the universe is accelerating.
Galaxies spin faster than they should, based on their visible matter.
Gas giants form farther from the Sun, where temperatures are cooler.
Answer:
Galaxies spin faster than they should based on their visible matter
Step-by-step explanation:
Hope this helps :)
Answer: Galaxies spin faster than they should based on their visible matter
Step-by-step explanation:Took the test got an A
if a = and b = -1 what is the value of ab -b^2
Answer:
-2
Step-by-step explanation:
To solve you need to replace the variables with their numbers.
3(-1) - (-1^2)
-1 x -1 = -1
3 x (-1) = -3
-3 - (-1) =
-2
Plz complete the table.
Answer:
32
Step-by-step explanation:
divide 1320 by 8 to see how many feet per minute and then divide that number by 5,280 ft to see your final answer.
Explain how you might go from gallons to cups using more than one conversion factor.
Answer:
use it as so-
4 cups/1 x 1 pint/2 cups= 2 pints
2 pints/1 x 1 quart/2 pints = 1 quart
1 quart/1 x 1 gallon/4 quarts= 1/4 gallons
therfore, 4 cups is equal to 1/4 gallons. hope this helps!
In order to convert gallons to cups using more than one conversion factor, first convert gallons to quarts and then convert quarts to cups.
How to convert gallons to cups?
The first step is to convert gallons to quarts:
1 gallon = 4 quarts
The convert quarts to cups:
1 quart = 4 cups
To learn how to convert units, please check: https://brainly.com/question/25993533
#SPJ2
write a word problem with 3-4 full sentences that can be represented by the expression 14 1/8 divided by 3.
Answer:
Step-by-step explanation:
Mary and her two friends are going out to eat. Mary orders 14 1/8 pints of ice cream ice cream cones. how much ice cream will each friend including mary get if they all get equal amounts.
A rental hall has 60 tables.
55% of the tables have 10 chairs at each table.
The remaining 45% of the tables have 8 chairs at each table.
Complete the model.
Then complete the statements to find the total number of chairs in the rental hall.
Answer:
Plz name me brainlieset thank you
Step-by-step explanation:
55% of the tables would be 33 tables times 10 chairs equals 330 Chairs That mean 60 Tables -33 tables Leaves you with 27 tables Times 8 Chairs Equals 216 Chairs So 330 and 216Equals 546 chairs
Answer:
55% 10 chairs:33
45% 8 chairs:27
330
216
546
Step-by-step explanation:
i just got it right
The least common multiple of two numbers is 84, and one of the numbers is 5 less than the other number. What are the numbers? Complete the explanation.
The two numbers are __ and __.84 is a multiple of each of its factors. The factors with a difference of 5 are__ and __ their LCM is 84.
Answer:
factor 1 = x
factor 2 = x - 5
(factor 1) * (factor 2) = 84
(x) * (x - 5) = 84
x² - 5x = 84
x² - 5x - 84 = 0
(x - 12) (x + 7) = 0
x - 12 = 0 or x + 7 = 0
x = 12 or x = -7
factor 2 = x - 5 = (12) - 5 = 7 or (-7) - 5 = -12
Answer: 12, 7 or -7, -12
Answer:
Below.
Step-by-step explanation:
84 = 7 * 12.
The 2 numbers are 7 and 12.
12 and 7 have a difference of 5.
Find the quotient:
7/8 ÷ 3/8
Answer:
2 and 5/8
Step-by-step explanation:
Use point-slope form, y - y1 = m(x - x1), to find the linear equation of a line that passes through the points (2, -1) and (10, 7).
Answer:
y = ✔ 1 x + ✔ -3
Step-by-step explanation:
edge 2020!
Reason about the correct unit of measure.
Explain your reasoning, using complete sentences.
Answer:
they each
Step-by-step explanation:
ok i got your mcdonalds 2 - 4x = 14
Answer:
x= gimme mcdonalds
Step-by-step explanation:
Answer:
x=3
Step-by-step explanation:
2-4x=12
-2. -2
-4x=12
divide by negative four x=3
Which inequality best represents that ice cream at −5°C is cooler than ice cream at 4°C?
(3.05 Practice Test)
Answer:
4°C > -5°C
hope this helps!
and dont forget 2
MARK ME BRAINLIEST!
Step-by-step explanation:
Answer:
−5°C < 4°C?
Step-by-step explanation: