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3 years ago

3(x- 1) - 8 = 4 (1+ x) = +5

Mathematics

1 answer:

katrin [286]3 years ago

6 0

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

x = 5 x = 4

Step-by-step explanation:

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The seating capacity of the school gym is 550. So far, there are 210 fans at a basketball game. How many

slavikrds [6]

Answer:

340 more fans

Step-by-step explanation:

550 - 210 = 340

p.s. There shouldn’t be anyone at a basketball game anyway.

6 0

3 years ago

11/24+w=11/12 I need help

DaniilM [7]

Answer:

w = 11/24

Step-by-step explanation:

11/24 + w = 11/12

w = 11/12 - 11/24

LCM of 12 and 24 is = 24

divide the denominators of both fractions by the LCM(24) and then multiply the results with the numerators

so we have w = 22 - 11 /24

w = 11/24

5 0

3 years ago

Write as a product of two polynomials. <br><br> (x-y)^2-a(y-x)

Setler79 [48]

Answer:

$\sf{(x-y)^2-a(y-x)} \\ = \sf{({x}^{2} - 2xy + {y}^{2} ) - (ay - ax)} \\$

7 0

2 years ago

Read 2 more answers

Help me solve this question <br> -2 1/3 - ( - 5) = ?

Svetlanka [38]

Answer:

2 2/3

Step-by-step explanation:

-2 1/3 - ( - 5)

We are subtracting a negative which is like adding

-2 1/3 + ( 5)

The signs are different so we subtract and take the sign of the larger

5 - 2 1/3

Borr from the 5

4 3/3 - 2 1/3

2 2/3

The sign of the larger was positive so the answer is positive

2 2/3

4 0

2 years ago

If you add 21 to my number and then multiply the result by 3, you will get 84 more than two-thirds of my number. Find my number.

Ksivusya [100]

Based on the calculations, the unknown number is equal to $\frac{-45}{7}$

Let the unknown number be x.

<h3>How to find an unknown number:</h3>

Translate the word problem into an algebraic expression, we have;

Adding 21 to the unknown number:

$21 +x$

Multiplying the result by 3:

$3\times (21+x)$

84 more than two-thirds of the unknown number:

$\frac{2x}{3} +84$

Equating the equations, we have:

$3\times (21+x) = \frac{2x}{3} +84\\\\43+3x=\frac{2x}{3} +84$

Cross-multiplying, we have:

$43+3x=\frac{2x}{3} +84\\\\129+9x=2x+84\\\\9x-2x=84-129\\\\7x=-45\\\\x=\frac{-45}{7}$

Read more on word problems here: brainly.com/question/13170908

5 0

3 years ago