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kiruha [24]
2 years ago
7

Please help me. marking brain list

Mathematics
2 answers:
Eduardwww [97]2 years ago
7 0
1. 23 = 4d + 5
-5 -5
18 = 4d
— —
4 4
4.5 = d


2. 3w + 15 = 45
-15 -15
3w = 30
— —
w = 10
padilas [110]2 years ago
6 0

Answer:

1.23=4f+5

=4d=23-5=18

=d=18/4=4.5

2.3w+15=45

=3w=45-15=30

=w=10

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What is the third angle of a right triangle if one of the angles measures 51.
Elodia [21]

Answer:

39

Step-by-step explanation:

The short answer is 39.

Every triangle has 180 degrees. There are no exceptions to this rule.

Since a triangle has 3 angles, all three together must add up to 180o

A right angle = 90 degrees always.

You are given 51 degrees as your second angle

The third one is x

x + 51 + 90 = 180                   Total of three angles must be 180

x + 141 = 180                           The left has been added to give 141

x = 180 - 141                            Subtract 141 from both sides

x = 39                                     The third angle = 39    

3 0
3 years ago
A parallelogram has side length of 9x+12 and 3x-4.what is the perimeter ?
Karo-lina-s [1.5K]
2(9x+12) + 2(3x-4)
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7 0
3 years ago
Calvin's school is 2.3 miles directly south of his house. After school, he takes a bus 1.8 miles directly west to the sports com
VladimirAG [237]

Answer:

2.9 miles

Step-by-step explanation:

If you draw this as a diagram, you will see that it is a right angled triangle and the missing side is the hypotenuse (the longest side). To calculate this, you will need to use the right angle law:

a^{2} + b^{2} = c^{2}

check out the document below (sorry, it's a little bit blurry)

3 0
3 years ago
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<5

Step-by-step explanation:

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8 0
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melomori [17]

Answer:

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Step-by-step explanation:

In this question, we are asked to find the other 3 angles in an intersection.

Please check attachment for what the diagram of the intersection might look like.

The intersection consists simply of 4 angles meeting at a point with the 2 angles on each side vertically opposite to the angles on the other side.

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These two angles are vertically opposite, this means that the other three angles are 55,125 and 125.

3 0
3 years ago
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