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2 years ago

Which number line best shows how to solve −4 − (−6)?

Mathematics

1 answer:

lozanna [386]2 years ago

3 0

Answer:

the answer is A

Step-by-step explanation:

because two negatives turn to a positive

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Marc has 45 Cds in his collection, and Corinna has 61. If Marc buys 4 new CDs each month and Corinna buys 2 new CDs each month,

Mkey [24]

After 8 months they both will have 77 CD's

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2 years ago

The sum of the measures of the angles of a triangle is 180. The sum of the measures of the second and third angles is four times

prohojiy [21]

Answer:

{36, 66, 78}

Step-by-step explanation:

Let the measures of the three angles be f, s and t, for first, second and third. Then s + t = 4f, t = 12 + s, and f + s + t = 180.

Subbing 12 + s for t in the first equation, we get s + 12 + s = 4f.

Subbing the same in the third equation, we get f + s + 12 + s = 180

This results in two equations in two unknowns (f and s):

2s - 4f = -12

2s + f = 168.

Let's eliminate s by subtracting the first of these two equations from the second. Doing so yields 5f = 180. Then the first angle, f, or x, is 36.

Then, from 2s + f = 168, we get 2s + 36 = 168, or 2s = 132. Thus, the second angle is s = y = 66.

The sum of the three angles must be 180. Thus, 36 + 66 + t = 180, or

102 + t = 180, or t = z = 78.

The three angles are

{36, 66, 78}.

3 0

2 years ago

In the regular pentagon below, if AP = 4 m and BC = 10 m, find it's area.

12345 [234]

First symmetrically cut the pentagon to get 5 pieces. (So that you will get the idea that this polygon is divided into 5 triangles)

Then find the area of one of the triangles:

Area of Triangle = $\frac{1}{2} bh$

A = $\frac{1}{2}$ × 4 × 10

A = 20 m²

To find the area of the whole pentagon shape:

A = 20 × 5 = 100 m²

<em>Hope it helps!</em>

4 0

1 year ago

7. Which is the area of a rectangle TYOC with vertices T(-6, 6), Y(2, 10), 0(4, 6),

antiseptic1488 [7]

Answer:b

Step-by-step explanation:

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2 years ago

What’s the answer to.... Add j to 1

gulaghasi [49]

Answer:

idk bro but ily

Step-by-step explanation:

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2 years ago