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Reika [66]
3 years ago
10

Help plz It would help me a lot

Mathematics
2 answers:
Alexandra [31]3 years ago
8 0

Step-by-step explanation:

What is the original problem?

Is it -1 - (-8)?

If so, then the answer is -7 because negative + negative = positive

-1 + 8 = -7

-31 - 40 = -71

-34 - 40 = -74

kolezko [41]3 years ago
4 0

Answer:

The answer is -71.

Step-by-step explanation:

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3 0
3 years ago
Use ABC, in which AB = 48, AC = 64, and BC = 80, to answer the question.
Deffense [45]

Answer:

CosB  = \frac{48}{80}

Step-by-step explanation:

Given

AB = 48, AC = 64, and BC = 80

Required

Determine the ratio of cosB

The first step is to determine, which type of triangle it is.

Checking for Right Angled Triangle

For a triangle to be a right angled triangle, the square of the largest side must be equal to the sum of squares of other sides

This implies that:

80^2 = 48^2 + 64^2

6400 = 2304 + 4096

6400 = 6400

<em>Hence, the triangle is a right angled triangle [See attachment]</em>

From trigonometry;

CosB  = \frac{Adjacent}{Hypotenuse}

The adjacent of B = 48 while the hypotenuse is 80;

Hence;

CosB  = \frac{48}{80}

Hence, the ratio of cos B is CosB  = \frac{48}{80}

4 0
4 years ago
I need help with 54-57 please
laiz [17]
The answer to the equation is -3
3 0
3 years ago
Read 2 more answers
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