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myrzilka [38]
2 years ago
8

Find the measure of angle A (please help!!!)

Mathematics
1 answer:
mel-nik [20]2 years ago
7 0

Answer: 41 degrees

Step-by-step explanation:

so, we know that a triangle is 180 degrees. since we know that one angle is 80 degrees, we can subtract that from the equation. now, we are trying to find what X is so that we can find the angle. here is how i did it:

i rewrote it and removed the parentheses.

4x + 1 + 4x + 19 = 100

then, i collected like terms and calculated it.

8x + 20 = 100

then, i moved the constant to the right.

8x = 100 - 20

then, i simply calculated it.

8x = 10

solution: x = 10

so, we just insert X into the angle for A. that gets us 4(10) + 1 = angle A

40 + 1 = angle A, hence angle A = 41 degrees.

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Answer:

12.73

Step-by-step explanation:

$63.64 * .20 = 12.73

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!!HELP ASAP!! What is the surface area of the rectangular pyramid below?
creativ13 [48]

Answer:

D. 507 square units

Step-by-step explanation:

surface area of the rectangular pyramid

= area \: of \: base  + 4 \times area \: of \: one \:  \triangle \\  \\  =  {13}^{2}  +  4 \times \frac{1}{2}  \times 13 \times 13 \\  \\  = 169 + 2 \times 169 \\  \\  = 169 + 338 \\  \\  = 507 \:  {units}^{2}  \\

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Harry has a small business cleaning kitchens and bathrooms. He usually cleans a bathroom in 1 hour and cleans a kitchen in 45 mi
Bumek [7]

Answer:

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Step-by-step explanation:

B=60

K=20

8*60=480

9*20=180

that would give harry 660 dollars in a week. HOWEVER- we have to make sure that its equal to or less than 15 hours of work.

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4 0
3 years ago
In an examination 80% students passed. if 15 less have appeared and 10 less have passed, the ratio of passers to failures would
Nina [5.8K]

Answer:

60 students passed, and 75 appeared in examination.

Step-by-step explanation:

Let's say s is the total number of students and p is the number of students who passed.

80% of the students passed, so:

0.8 s = p

If there were 10 less passers, and 15 less students (5 less failures), then the ratio of passers to failures would be 5/1.

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Simplify the second equation:

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p = 0.8 s

p = 60

60 students passed, and 75 appeared in examination.

5 0
3 years ago
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