Please help, I need to study for a math test on Thursday, but I'm stuck on these three questions. Please do your best at answering everything and if not, at least do two of them. Also, please include an explanation, I will give brainliest to you if you include an explanation and at least two problems. Thanks!!! ☺️ ☺️ ☺️ ☺️

Answer:

Answer 19:- x = 5

Answer 20:- x = 11

Step-by-step explanation:

Answer 19:-

2x + 10 = 20

2x = 10

x = 5

Answer 20:-

80 + 20x = 300

20x = 220

x = 11

Answer:

19. x = 5

This is because Elise need $20, so we are going to figure out x

First, subtract 10 by both sides

2x = 10

Then, divide both sides by two to isolate the variable

x = 5

5 cars is the minimum

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20. He can stay for 11 nights.

First we subtract 80 by both sides

20x = 220

Then we isolate the variable by dividing both sides by 20

x = 11

The height of a baseball in feet x seconds after a batter hits it can be represented by the function f(x)=−2x2+10. How many feet high is the baseball after 2 seconds?

Which estimation technique will yield a solution that is closest to the actual product of (–21.06)(–30.45)?
front-end estimation
rounding to the nearest tenth
rounding to the nearest whole number
compatible numbers

(dont answer if you dont know pleas) please help

If the Soccer Coach for your team notices the great sale at Sherman’s Sporting Goods and decides he will purchase 30 Soccer Balls. How much will he pay including 8.875 % sales tax?

8 x __ = 12
Has to be a fraction
Need help ASAP

First right brainliest

A manufacturer of jet engine harnesses has weekly production costs of C = 0.25x2 - 10x + 800 where C is the total cost (in dollars) and x is the number of units produced. What is the average rate of change in the cost per unit as the manufacturer increases the weekly production from 500 to 600 units?

a rectangle has an area of 7/8 square feet. If the rectangle has a width of 3/4 foot, what is the length of the rectangle?
a. 1 1/3 feet b. 1 1/6 feet c. 1/8 foot d. 1 foot

Giving brainliest to the first on or second answer {THATS RIGHT}

Mr. Goggins planted 10 rows of beans, 10 rows of squash, 10 rows of
tomatoes, and 10 rows of cucumbers in his garden. He put 22 plants in
each row. Draw an area model, label each part, and then write an
expression that represents the total number of plants in the garden.

What is -2(3x+12y-5-17x-16y+4) simplified?

arielle is making a taco salad with lettuce, ground beef, tomatoes, and cheese how many different ways can Ariel layer the ingredients of the taco salad?
plss someone help

help me plsssssssssssssss

A baby animal costs half as much to keep as an adult. Write an expression to show how much it costs per week to keep the baby animal where x is the number of pounds one adult eats in a day. Simplify your expression.

WILL GIVE BRAINLEIST

Is -3 1/2 + 3.18 positive or negative?

--> positive
--> negative
--> neither
--> both

* Answer all, get brainiest. 10 points per question.

Vodafone is charging a flat fee of $90 per month regardless of calling time. Let C1 be the Vodafone monthly cost. Express the monthly cost in the equation. Start with C1=

A. C1=90*m
B. C1=90
C. C1=m+90

Let's examine Telefónica which is charging $50 per month and additional 20 cents fee per minute of calling time. Let C2 be the monthly cost in dollars at Telefónica and m - minutes spend on the phone. Write an equation to model monthly cost. TIP: Do not forget to turn cents into dollars. Start with C2= *

A. C2=50+20m
B. C2=50+0.20m
C. C2=50*20m

With these 5 hours of calling time in mind, calculate and show the cost of phone service for Vodafone

A. C1=90*5=$450 (very expensive plan!)
B. C1=90 (cost stays the same at $90 regardless of usage)
C. C1=90+minutes

And now calculate and show the monthly cost for Telefónica with 5 hours of calling time in mind. Do not forget to convert hours into minutes *

A. C2=$50
B. C2=50+0.20*5=$51
C. C2=50+0.20*300=$110

Which plan works best for Kira? Why?

Is there a point (in terms of minutes) when the monthly cost is the same for both phone companies? Explain

In a right triangle the length of a hypotenuse is c and the length of one leg is a. Find the length of the other leg b, if:

c=13, a=5

Which graph could represent the following story? Trent walked from the cafeteria to his math class. After class, he walked back to the cafeteria and stopped to get a beverage from a vending machine on the way.

A) Image 1 (1st Image)
B) Image 2 (2nd Image)
C) Image 3 (3rd Image)
D) Image 4 (4th Image)

I have a problem, please help.

So here’s the example: 1 + 1 = __
A) 2
B) 2
C) 3
D) 4

A and B are both 2, which one do I pick. I can only pick one answer choice.

Please help, it's worth 40% of my grade :(

Alice tried to solve the equation. What was her mistake?
-1/4(x - 12) = -1
-1/4x = 11
x = -44

PLEASE ANSWER ALL QUESTIONS SHOWN, IGNORE THE ONES THAT SAY ADD A FILE!

40 POINTS PLEASE HELPP !

Help meh.
Wats the inequality?
2x-5>12

Lin's father is paying for a $20 meal. He has a 15%-off coupon for the meal. After the discount, a 7% sales tax is applied.

What does Lin's father pay for the meal?

Aight. I know the answer but tell me how to get it if I were to get it again? (It would help me ALOT.)

On Saturday, Smoothie Central made $1300 in sales. On Sunday, they made $900 in sales. What is the percent of change from Saturday to Sunday?

Another question need help again

Help??? Brainliset


Andre took a trip from Boston, Massachusetts to Paris, France. In 6 2/3 hours, the plane flew 3,669 4/5 miles. How far had the plane traveled in 1 hour?