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2 years ago

PLEASE HELP MARKING BRAINLIEST image attached

Mathematics

1 answer:

Eduardwww [97]2 years ago

5 0

Answer: x=7

Step-by-step explanation:

(3x+6)+(8x+7)=90

(3x+6)+(8x+7)+90=180

SOLVE THE SYSTEM OF EQUATIONS

YOU GET 7

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Find the value of B - A if the graph of Ax + By = 3 passes through the point (-7,2), and is parallel to the graph of x + 3y = -5

Gnoma [55]

The required simplified value of B - A = -6.

<h3>What is simplification?</h3>

The process in mathematics to operate and interpret the function to make the function simple or more understandable is called simplifying and the process is called simplification.

Since, line Ax + By = 3 and x + 3y = -5 are parallel than slope of both the line will be same,
m = -1/3 = -A/B
From above
A = B/3 - - - - -(1)

Now line Ax + By = 3 passed through the point (-7, 2). So,
-7A + 2B = 3
from equation 1
-7B/3 + 2B = 3
-B/3 = 3
B = -9
Now put B in equation 1
A = -9 / 3
A = -3

Here,
B - A = -9 + 3 = -6

Thus, the required simplified value of B - A = -6.

Learn more about simplification here: brainly.com/question/12501526

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1 year ago

connie sells lemonade for $0.25 per small cup and $0.75 per large cup. if she sells 20 small cups how many large ones must she s

Nady [450]

Answer:34

Step-by-step explanation:

8 0

3 years ago

QUICK HELP! How many terms are in the simplified expression? How many of the terms in the simplified expression are negative?

Bess [88]

There are 4 terms.
The second term and the fourth term have negative coefficients.
Terms are only negative depending on the value of the variables.

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3 years ago

Following are heights, in inches, for a sample of college basketball players. 78 83 82 78 78 80 81 79 79 83 77 78 84 82 80 80 82

blagie [28]

The mean height of the basketball players is 80.3 inches

For given question,

we have been given the list of heights, in inches, for a sample of college basketball players.

We need to find the mean height of the basketball players.

We know that, for given sample of data

mean = sum of all observations ÷ total number of observation

First we find the sum of given heights.

78 + 83 + 82 + 78 + 78 + 80+ 81 +79+ 79 +83+ 77 +78+ 84+ 82+ 80+ 80 +82+ 84+78+ 80 = 1606

Total number of observations = 20

Using the formula of mean,

⇒ mean height = 1606/20

⇒ mean height = 80.3 inches

Therefore, the mean height of the basketball players is 80.3 inches

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brainly.com/question/6813742

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1 year ago

N-3. Evaluate the algebraic expression when n=5<br> A. 2<br> B. 8<br> C. 5<br> D. 5/3

Oksana_A [137]

Answer:

Step-by-step explanation:

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3 years ago

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