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kifflom [539]
3 years ago
6

9th-grade geometry Find AB

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
6 0

Answer:

d)AB = 12

Step-by-step explanation:

ΔADB ≅ ΔADC

⇒ AB ≅ AC    {Corresponding parts of congruent triangles}

10x - 8 = 3x +6

Add 8 to both sides

10x = 3x + 6 + 8

10x = 3x + 14

Subtract 3x from both sides

10x - 3x = 14

7x = 14

Divide both sides by 7

x = 14/7

x =  2

AB = 10x - 8

     = 10*2 - 8

     = 20 - 8

AB= 12

Julli [10]3 years ago
4 0

Answer:

AB=2

Step-by-step explanation:

10x-8=3x+6

7x-8=6

7x=14

x=2

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Marcus is running around a track that is 3/8 of a mile long. If he runs around the track 4 1/2 times, how many miles will he hav
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Answer:

1 and 11/16 miles

Step-by-step explanation:

running around once is 3/8 miles, 4 1/2 is the same as 9/2

9/2 * 3/8 = (9*3)/(2*8) = 27/16, or 1 and 11/16

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What is y=2x-5 and x+3y=27 graphed
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Answer:

See attachment

Step-by-step explanation:

The first function is y=2x-5.

The slope is m=2 and the y-intercept is b=5.

The second equation is x+3y=27.

The slope intercept form is y=\frac{1}{3}x+9

The slope is m=\frac{1}{3} and y-intercept is b=9

The graph of these two functions is shown in the attachment.

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4 years ago
there are 2 children in the classroom, each student will get 6 penciles and 4 erasers how many pencils will the teacher have to
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4 years ago
Suppose A, R, and B are collinear on AB, and AR:AB= 1/5. What are the coordinates of R?
AfilCa [17]

Answer:

R(1.6, 0)

Step-by-step explanation:

Use the formula, (x, y) = (x_1 + k(x_2 - x_1), y_1 + k(y_2 - y_1)) to find the coordinates of point R, that partition the lie segment AB into the ratio 1/5.

Let,

A(1, -1) = (x_1, y_1)

B(4, 4) = (x_2, y_2)

Thus, plug in the values as follows:

R(x, y) = (1 + \frac{1}{5}(4 - 1), -1 + \frac{1}{5}(4 -(-1))

R(x, y) = (1 + \frac{1}{5}(3), -1 + \frac{1}{5}(4 + 1)

R(x, y) = (1 + \frac{1}{5}(3), -1 + \frac{1}{5}(5)

R(x, y) = (1 + \frac{3}{5}, -1 + \frac{5}{5})

R(x, y) = (\frac{5 + 3}{5}, -1 + 1)

R(x, y) = (\frac{8}{5}, 0)

R(x, y) = (1.6, 0)

The coordinates of point R, are (1.6, 0)

7 0
4 years ago
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