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Andreyy89
3 years ago
12

Add the expression (algebra)

Mathematics
2 answers:
vodka [1.7K]3 years ago
6 0

Step-by-step explanation:

1.

(2x+5)+(x+4)\\2x+5+x+4\\2x+x+5+4\\3x+9

2.

(3y-5)+(2y+4)\\3y-5+2y+4\\3y+2y-5+4\\5y-1

3.

(4a+12)+(-6a-13)\\4a+12-6a-13\\4a-6a+12-13\\-2a-1

4.

(3x+3)-(4x+6)\\3x+3-4x-6\\3x-4x+3-6\\-x-3

5.

(8y-7)-(y-4)\\8y-7-y+4\\8y-y-7+4\\7y-3

6. Incomplete (3b + ?)

7.

16y-8\\(8)(2y-1)

8.

-12c-8\\(4)(-3c-2)

kifflom [539]3 years ago
3 0
1. 3x + 9
2.5y - 1
3.-2a - 1
4. x - 3
5. 7y - 3
6. b - 7
7. 8(2y - 1)
8. -4(3c + 2)
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So the "before" is the large solid triangle and the "after" is the smaller dashed triangle.

The horizontal side of the solid triangle is 15 units. The corresponding side for the dashed triangle is 3 units. Dividing the two values gives: 3/15 = 1/5 = 0.2

Make this value negative. The reason why is due to the fact that we have a sort of reflection going on as we're scaling down the figure. 

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If you reflect the image over the x - axis, what are the new coordinates of the shape?
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Greetings!

When reflecting a shape over the x-axis, you simply change the number to its opposite positive/negative equivalent.

This means that the new co-ordinates would be (-5,1) , (-5,4) and (-2,4).


Hope this helps!

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What is the missing number?
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Answer:

y = 2^{x}

Step-by-step explanation:

Given the above data for x and y.

From the algebraic expression;

y = 2^{x}

We can deduce that the value of y is equal to two (2) raise to the power of x.

When x = 1, y = 2

y = 2^{x}

y = 2^{1}

y = 2

When x = 2, y = 4

y = 2^{x}

y = 2^{2}

y = 4

When x = 3, y = 8

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y = 2^{3}

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3 0
3 years ago
2. Jessica's financial advisor believes that she should spend no more than 28% of her gross monthly income for housing. She has
scoray [572]

Jessica's annual salary is $68571.43.

Data;

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<h3>Percentage</h3>

This is the ratio of a number to the entire value and multiplied by 100

The percentage set aside for housing is given as 28% which is $1600.

Let find 28% of x which is equal to 1600

\frac{28}{100} = \frac{1600}{x}

cross multiply both sides and solve for x

\frac{28}{100}  = \frac{1600}{x}\\ 28*x  = 100*1600\\28x = 160000\\

Divide both sides by the coefficient of x

\frac{28x}{28} = \frac{160000}{28}\\ x = 5714.28

Her monthly income is $5714.28.

Let's multiply this by 12 (months in a year) to determine her gross monthly income.

5714.28*12 = 68571.43

From the above calculations, Jessica's annual salary is $68571.43.

Learn more on percentage here;

brainly.com/question/25567167

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