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Neko [114]
3 years ago
15

A triangle ABC with vertices A(6,8) B(6,12) C(10,12) is rotated to 180. What are the coordinates of B

Mathematics
1 answer:
hichkok12 [17]3 years ago
8 0
Assuming rotation is about origin, then
R180:  (x,y)->(-x,-y)

So
A(6,8)->A'(-6,-8)
B(6,12)->B'(-6,-12)
C(10,12)->C'(-10,-12)
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One leg of a right triangle has a length of 77 m. the other sides have lengths that are consecutive integers. find these lengths
ANTONII [103]
Let x and x+1 represent the consecutive integers, then x is the other leg and x+1 is the hypotenuse (because the hypotenuse must be greater than its sides).

Use Pythagorean Theorem:
  a²   + b² = c²
(77)² + x² = (x+1)²
5929 + x² = x² + 2x + 1
5928        =        2x
2964        =          x

x+1 = 2965

Answer: The other leg is 2964 m and the hypotenuse is 2965 m
5 0
4 years ago
Kristen has 64 coins in her bank. She has $9.25 in dimes and quarters. How many dimes and quarters does she have?
Stella [2.4K]
D= # of dimes
q= # of quarters

QUANTITY EQUATION:
d + q= 64

COST EQUATION:
0.10d + 0.25q= $9.25


STEP 1:
multiply quantity equation by -0.10 to be able to eliminate the d term in step 2

(-0.10)(d + q)= (-0.10)(64)
-0.10d - 0.10q= -6.40


STEP 2:
add equation from step 1 to cost equation to eliminate the d term and solve for q

Add
0.10d + 0.25q= $9.25
-0.10d - 0.10q= -6.40

0.15q= 2.85
divide both sides by 0.15

q= 19 quarters


STEP 3:
substitute q value in step 2 into either original equation to find d value

d + q= 64

d + 19= 64
subtract 19 from both sides

d= 45 dimes


CHECK:
0.10d + 0.25q= $9.25
0.10(45) + 0.25(19)= 9.25
4.50 + 4.75= 9.25
9.25= 9.25


ANSWER: There are 45 dimes and 19 quarters.

Hope this helps! :)
7 0
4 years ago
Which shape has 2 parallel sides /i ready question
sesenic [268]

Answer:

A Parallelogram

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
How do you find the perimeter
Dima020 [189]
Perimeter = 2 times the Length + 2 times the Width
4 0
3 years ago
Simplify. √25a^2. <br> 40 points but reported if troll.
Levart [38]
I think that the answer is 5a.
The square root of 25 is 5 and the square root of a^2 is a.
Hope this helps and if possible could I please have the brainliest answer?
8 0
3 years ago
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