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2 years ago

A) 3= x + 7 b) -7a-49

Mathematics

2 answers:

xxTIMURxx [149]2 years ago

8 0

Answer:

A: x = -4

B: a = -7 (I'm assuming the '-' in front of 49 was supposed to be an '=')

Step-by-step explanation:

A: You need to group the like terms together, and isolate the variable, which in this case is x.

Take the 7 over to the other side, so the equation looks a little bit like this.

3-7 = x.

3-7 is -4, so we've gotten our answer.

x = -4.

B: -7a = 49.

When two negative numbers are multiplied together, the product becomes positive.

49 is 7x7.

-7 times -7 would be 49.

So, in this situation, a would be -7.

a = -7.

mars1129 [50]2 years ago

3 0

Answer: b im pretty sure hope this helps :)

Step-by-step explanation:

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Answer:

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3 years ago

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Answer:

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Step-by-step explanation:

The Pythagorean theorem tells you ...

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Answer:

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Step-by-step explanation:

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omeli [17]

Answer:

Step-by-step explanation:

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2 years ago

Find the slope of the line that passes through the points A(0, 2) and B(4, -1)

omeli [17]

Answer:

$\displaystyle m=\frac{-3}{4}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinates (x, y)
Slope Formula: $\displaystyle m=\frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

Step 1: Define

Point A(0, 2)

Point B(4, -1)

Step 2: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

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[Fraction] Subtract: $\displaystyle m=\frac{-3}{4}$

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