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stepladder [879]
2 years ago
15

DE is the perpendicular bisector of AC. Find AC.

Mathematics
1 answer:
Masja [62]2 years ago
7 0

Answer:

Step-by-step explanation:

It is hard to read but (5x - 2) + (7x - 9)  =  AC    also  5x - 2   =   7x - 9

    5x - 2 = 7x - 9         subtract 5x from both sides then add 9 to both sides

5x - 5x - 2 + 9  = 7x - 5x - 9 + 9

   -2 + 9 = 7x - 5x

          7  =  2x

        3.5  =  x

    5x - 2 = 7x - 9    

         3   ≠    -2                        when x = 1

         8   ≠     5                        when x = 2

        13   ≠    12                        when x = 3

     15.5   =    15.5                     when x = 3.5

        18   ≠    19                        when x = 4

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BlackZzzverrR [31]
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5 0
3 years ago
Find the surface area of the rectangular and triangular prisms
harina [27]
Is there a picture to this????

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7 0
3 years ago
Charlotte borrows $9000 to buy a second-hand car. The loan must be repaid
QveST [7]

Answer:

$13,400

Step-by-step explanation:

Simple Interest = principal × rate × time

principal= $9000

Rate= 12/100=0•12

Time=5years

Simple interest =PRT

= 9000× 0•12 × 5

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Total amount to be paid = 9000 + 5400

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8 0
3 years ago
Someone help?!.........
koban [17]
Answer: y = -2x + 16

Explanation:

Use point slope form:

(y1 - y) = m(x1 - x)

y1 = 6 and x1 = 5 and m = -2

6 - y = -2(5 - x)
6 - y = -10 + 2x
-y = 2x - 10 - 6
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5 0
3 years ago
Can someone help me with this proof
maksim [4K]

Step-by-step explanation:

Given :

Given that lines a and b are parallel, angles 1 and 5 are congruent because they are corresponding angles, and angles 1 and 4 are congruent because they are vertical angles

To find : by which property are angles 4 and 5 congruent

Solution :

We know that if two parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent.

Also, we know that if two things are equal to the same thing then they are equal to each other . In this case, we can say that if two angles are congruent to a third angle, then they are congruent to each other. As angles 4 and 5 are both congruent to angle 1, they are congruent to each other but angles 4 and 5 are alternate interior angles. So, if parallel lines have a transversal, alternate interior angles are congruent.

8 0
2 years ago
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