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3 years ago

Triangle BCD is rotated counterclockwise to form

Mathematics

2 answers:

Anastaziya [24]3 years ago

7 0

Answer:

B 90 degrees

Step-by-step explanation:

IRISSAK [1]3 years ago

6 0

Answer:

The answer is 90 degrees. Have a good day!

Step-by-step explanation:

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Simplify by combining like terms: -4x - 2y - 7x - 8y

Sav [38]

Step-by-step explanation:

Solving like terms

-4x - 7x - 2y -8y

-11x - 10y

3 0

3 years ago

Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at 75 miles per

Alisiya [41]

Let the time = x

Distance = Speed x time

One train is 75x, the other train 85x

Add together to equal total distance:

75x + 85x = 384

Simplify:

160x = 384

Divide both sides by 160:

x = 384 / 160

x = 2.4 hours

8 0

2 years ago

KX equals X +4 find K7

Andre45 [30]

KX = x+4 so solve for k.
Divide both sides of the equation by x and you get K=4.
Plug it in, and you get (4)(7)=28
Your answer is 28.

5 0

2 years ago

Find the vertex of this parabola. y = -2x2 + 4x + 12

STatiana [176]

For this case we have the following equation:
$y = -2x ^ 2 + 4x + 12
$
Deriving we have:
$y = -2x ^ 2 + 4x + 12

y '= -4x + 4$
We match zero:
$-4x + 4 = 0
$
We clear the value of x:
$4x = 4

x = 4/4

x = 1$
Then, we substitute the value of x in the equation of the parabola:
$y = -2 (1) ^ 2 + 4 (1) + 12

y = -2 + 4 + 12

y = 14$
Thus, the vertex of the parabola is the ordered pair:
$(x, y) = (1, 14)$
Answer:
The vertice is:
$(x, y) = (1, 14)$

3 0

2 years ago

Simplify the expression using properties of exponents. 12a-9b-4 9a2b6

Free_Kalibri [48]

Check out -m-a-t-h-w-a-y-.-c-o-m- (This helps a lot!)

5 0

2 years ago