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4 years ago

GeometryAnswers for 1-3, Multiple Choice!

Mathematics

1 answer:

brilliants [131]4 years ago

7 0

Answer:

a. ∠Y, ∠W, ∠X
d. 75°
d. 5

Step-by-step explanation:

1. The sides, shortest to longest, are 5, 10, 12. The angles opposite are in the same order (smallest to largest). Those angles are ∠Y, ∠W, ∠X.

2. The triangle isosceles, so the base angles are equal. The sum of angles in a triangle is 180°, so you have ...

30° + 2x = 180°

15° + x = 90° . . . . . divide by 2

x = 75° . . . . . . . . . . subtract 15°

3. The midline of a triangle is half the length of the base it is parallel to, so ...

ML = 10/2 = 5

It is a <em>midline</em> because it joins the midpoints of two sides of the triangle.

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Maru [420]

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3 years ago

What is the value of x in the equation 4x+8y=40, when y=0.8?

lubasha [3.4K]

4x+8y=40
0.8*8=6.4
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3 years ago

Peter inherits 15.000 dollars and place money with a bank. The interest rate are 3 percent. How many money will he get after 1ye

NeTakaya

The simplest form of an interest equation is A = P(1+rt)

where A = the total amount of money at the end, P = the principal (or amount of money you started with), r = the rate in percent, and t = the time in years.

In this case, P = 15000, r = 0.03 (because 3% in decimal form is 0.03), and t = 1:

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4 years ago

WHEN gEORGE AND aNTHEA WERE MARRIED 120 OF THE GUEST aNTHEA'S FAMILY OR FRIENDS. THIS WAS 60 PERCENT OF THE TOTAL number of gues

Mama L [17]

Answer:

Step-by-step explanation:

In this problem, we will use ratios

60%------->120 guests

30%-------->60guests

10%---------->20guests

Multiply by 10 to both sides to get 200

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hope this helps!

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3 years ago

How would I work this out

liraira [26]

Answer:

10.1

Step-by-step explanation:

You can find the length of XY by first finding YZ using the Pythagorean theorem. Then subtract the length from 15 for the length of the other triangle. Use the Pythagorean theorem again to find XY.

The Pythagorean theorem is used for all right triangles and is the formula $a^2 + b^2 = c^2$ . Here a = 4, b is unknown and c = 7.

So $4^2 + b^2 = 7^2\\16 + b^2 = 49\\b^2 = 33\\b = \sqrt{33} =5.75$

Subtract 5.75 from 15.

15 - 5.75 = 9.25.

Repeat the Pythagorean Theorem again with a = 4, b = 9.25 and c is unknown. Solve for c. This is XY.

$4^2 + 9.25^2 = c^2\\16 + 85.56 = c^2\\101.6 = c^2\\10.1 = c$

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4 years ago

GeometryAnswers for 1-3, Multiple Choice!​

GeometryAnswers for 1-3, Multiple Choice!