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3 years ago

HELP Math will give 25 brainly points

Mathematics

2 answers:

aleksklad [387]3 years ago

7 0

51 degrees should be the correct answer

77julia77 [94]3 years ago

4 0

9514 1404 393

Answer:

51°

Step-by-step explanation:

The angles where the expressions are given are a linear pair, so total 180°.

(3x +15) +(10x +9) = 180

13x = 156 . . . . . . . . . . . . . . . subtract 24, collect terms

x = 156/13 = 12

Then the acute angle is ...

3x +15 = 3(12) +15 = 36 +15 = 51

The stairs make an angle of 51° with the basement floor.

_____

<em>Additional comment</em>

Building code requires the rise to be not more than 8 and the run not less than 9, so the maximum angle is about 41.6°. A 51° staircase would not meet code.

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Can someone plsss help :)

OLga [1]

Set equal to eachother
(2x+1) = 79
Subtract 1 from both sides
2x=78
Divide 2 from both sides
2x/2=78/2
X= 39

5 0

3 years ago

Frankie wants to build a path from one corner of his hard to the opposite corner his yard measures 20ft x 32ft what will be the

Papessa [141]

Answer:

37.7 feet

Step-by-step explanation:

Given that:

Measurements of Frankie's yard = 20ft x 32ft

He wants to build a path from one corner to another.

To find:

The length of path = ?

Solution:

Let us consider a rectangle $ABCD$ as shown in the attached image in the answer area.

We are given the two adjacent sides of a rectangle and we have to find diagonal of the rectangle.

To find the diagonal, we can use the Pythagorean Theorem.

We are given the base and perpendicular of the right angled triangle and we have to find the hypotenuse.

According to Pythagorean theorem:

$\text{Hypotenuse}^{2} = \text{Base}^{2} + \text{Perpendicular}^{2}$

$Diagonal = 20^2 + 32^2\\\Rightarrow Diagonal = 400 + 1024\\\Rightarrow Diagonal = \bold{37.7\ ft}$

4 0

3 years ago

Please help me solve this I forgot how to

RideAnS [48]

2.5

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3 years ago

Out of 21 students in Mrs.Clarks class, 3/7 of the class are boys and 4/7 are girls. How many students in the class are girls an

lidiya [134]

Answer:

9 boys and 12 girls

Step-by-step explanation:

if you multiply the denominators by 3, you get "out of" 21. All you need to do after that is multiply the top by 3 as well and it tells you there are 9 boys and 12 girls.

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3 years ago

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UNO [17]

Answer:

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Step-by-step explanation:

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3 years ago

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