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salantis [7]
3 years ago
9

Please help me with the answer!! There is the picture of the problem^

Mathematics
2 answers:
Greeley [361]3 years ago
6 0

Answer:

A = 84º

B = 74º

C = 22º

Step-by-step explanation:

Since all the three angles of a triangle have to add up to be 180º, one can do...

A + B + C = 180º

So,

(4x+12) + (3x+20) + (x+4) = 180º

8x + 36 = 180º

8x = 144

x = 18

Then you just substitute x in each of the angles

A = 4(18) + 12 = 84º

B = 3(18) + 20 = 74º

C = (18) + 4 = 22º

***Math Check: 84 + 74 + 22 = 180º

inessss [21]3 years ago
4 0

Answer:

X=18

Step-by-step explanation:

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The length of a rectangle is five inches less than twice it’s width. If the rectangle has a perimeter of 80 inches, find the len
yawa3891 [41]

Answer:

Width of the rectangle  = 15 inches

Length of the rectangle  = 25 inches

Step-by-step explanation:

Let the width of the rectangle =  k inches

So, the length of the rectangle =   (2k -5) inches

Perimeter = 80 in

Perimeter of a rectangle = 2 (Length + Width)

⇒  80 = 2(k + (2k -5)

or 80 = 6k - 10

⇒ 6k = 80 + 10 = 90

or  k = 90 / 6

⇒ k = 15

So the width of the rectangle  = k  = 15 inches

And the length of the rectangle =  2k -5 = 2 x 25  - 5 = 25 inches

5 0
3 years ago
Javier drove 45 miles. This represents 60% of his entire trip. What is the total number of miles in Javier's trip?
trapecia [35]
60% of trip = 45 miles

let total trip distance = <u />l

60% is given by multiplying by 0.6

So;

0.6l = 45 \\  \\  l = \frac{45}{0.6}  \\  \\ \boxed{l = 75}


5 0
3 years ago
Read 2 more answers
The midpoint of AB is M(-2,-4). If the coordinates of A are (-3,-5), what are the coordinates of B?
Luba_88 [7]

Answer:

B(-1,-3)

Step-by-step explanation:

let the coordinates of B be (x,y)

Mid point of AB = (x₁+ x₂/2,  y₁+y₂ /2)

                           = (-3 +x/2 , -5+y/2)

Mid point of AB is  M(-2,-4)

(-3 +x/2 , -5+y/2) = (-2, -4)

-3 + x /2 = -2       ; -5+y/2 = -4

    -3 + x = -2 * 2 ;    -5 + y = -4 * 2

       -3 + x = -4    ;     -5 + y = -8

            x = -4 +3 ;    y     = -8 +5

            x = -1       ; y = -3

B(-1,-3)

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4 years ago
185 in.=_ft_in. how many are in the blanks
olga55 [171]
185 in. = 15ft and 5in.
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A(-2,-2) B(-1,2) C(2,1) / A (-4,-4) (-2,4) C(4,2)
Vitek1552 [10]

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