I need help<br> y = 20x + 40 y = 30x + 10

Combine like terms -2xy+2xy+3xy

liberstina [14]

Answer:

3xy

Step-by-step explanation:

These terms are all like terms so you can add:

-2xy + 2xy = <em>0xy</em>

Now add 3xy + 0xy: 3xy

3 0

3 years ago

2t + 7 = -1 what is " t " ?? pls help ☆ ⌒ (> _ <)

kvasek [131]

Answer:

So,

2t + 7 = -1

-7 -7

2t = -8

2t/2 = -8/2

Step-by-step explanation:

4 0

3 years ago

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Hamburgers cost $2.50 and cheeseburgers cost $3.50 at a snack bar. Ben has sold no more than $30 worth of hamburgers and cheeseb

gregori [183]

Using the inequality
2.50x + 3.50y ≤ 30
substituting y with the number of cheeseburgers sold
2.5x + 3.5(4) ≤ 30
x = 6.4
The maximum number of hamburgers he can sell is 6

5 0

3 years ago

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A container is 1/8 full of water. After 10 cups of water are added,the container is 3/4 full. What is the volume of the containe

Liula [17]

<u>Answer</u>

16 cups

<u>Explanation</u>

First we find the difference between 1/8 and 3/4 of the container.

3/4 - 1/8 = 6/8 - 1/8

= 5/8

From here we can say that;

5/8 full of water represent 10 cups, what of 8/8 full of water?

5/8 ⇒ 10 cups.

8/8 ⇒ ?

Using cross multiplication;

(8/8 × 10) ÷ 5/8 = 10 ×8/5

= (10 × 8)/5

= 80/5

= 16 cups

8 0

4 years ago

Read 2 more answers

A very short quiz has one multiple-choice question with five possible choices (a, b, c, d, e) and one true or false question. As

earnstyle [38]

<h3>a. The probability that both questions are answered </h3><h3>correctly = 0.1 </h3><h3>b. The probability that only one questions is </h3><h3>answered correctly = 0.5</h3><h3>c. The probability that none questions is </h3><h3>answered correctly = 0.4</h3><h3>d. The probability that only question 1 is </h3><h3>answered correctly = 0.1</h3><h3>e. The probability that only question 2 is answered</h3><h3> correctly = 0.4</h3>

Step-by-step explanation:

Here given: The quiz has two questions.

Question 1 is an Multiple Choice Question with 5 options, out of which only <u>one option is the correct option</u>.

So, the probability of answering the question 1 correctly = $(\frac{1}{5} ) = 0.2$

Question 2 is an true false question with 2 options, out of which only <u>one option is the correct option</u>.

So, the probability of answering the question 2 correctly = $(\frac{1}{2} ) = 0.5$

Now, let us consider each part asked:

a. The probability that <u>both questions are answered correctly </u>

= (0.2)(0.5) = 0.1

b. The probability that <u>only one questions is answered correctly </u>

= 1 - [both right or both wrong] = 1 - [0.1 + (0.5)(0.8)] = 1-[0.5] = 0.5

c. The probability that <u>none questions is answered correctly </u>

= P(not Q1) x P(not Q2) = (1- P(Q1) )(1- P(Q2)) = (1-0.5)(1-0.2) = 0.4

d. The probability that only<u> question 1 is answered correctly </u>

= P( Q1) x P(not Q2) = (1- P(Q1) )(P(Q2)) = (1-0.5)(0.2) = 0.1

e. The probability that only<u> question 2 is answered correctly </u>

= P( not Q1) x P( Q2) = (P(Q1) )(1- P(Q2)) = (0.5)(1-0.2) = 0.4

3 0

3 years ago

I need help y = 20x + 40 y = 30x + 10