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3 years ago

How do I solve 8 - 4x + 5y when x = -2 and y = 6

Mathematics

1 answer:

Oliga [24]3 years ago

3 0

8 - 4(-2) + 5(6)
8 + 8 + 30
=46

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What is the length of x? What is the length of EF? Only enter numbers in the answer boxes below:

dimaraw [331]

Focus on triangles DFC and DFE:

They are both right triangles because DF is perpendicular to EC
DC=DE
DF is a common side

So, the two triangles are congruent. It follows that CF=FE, and in particular

$8x=3x+15 \iff 5x=15 \iff x=3$

And since x=3, the length of EF is

$EF=3x+15=3\cdot 3+15=24$

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3 years ago

Line segment AB has vertices A(-3, 4) and B(1, -2). A dilation centered at the orgin is applied to AB. The image has vertices A(

bixtya [17]

Answer:

option 2

Step-by-step explanation:

consider the coordinates A (- 3, 4 ) and A' (- 1, $\frac{4}{3}$ )

since the dilatation is centred at the origin, then corresponding coordinates are multiples/ divisors of each other, then image to original gives scale factor.

scale factor = $\frac{A'}{A}$ = $\frac{-1}{-3}$ = $\frac{1}{3}$ and $\frac{\frac{4}{3} }{4}$ = $\frac{1}{3}$

similarly B (1, - 2 ) and B' ( $\frac{1}{3}$ , - $\frac{2}{3}$ )

$\frac{\frac{1}{3} }{1}$ = $\frac{1}{3}$ and $\frac{-\frac{2}{3} }{-2}$ = $\frac{1}{3}$

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2 years ago

for a project in her geometry class, amira uses a mirror on the ground to measure the height of her school’s football goalpost.

kari74 [83]

Answer:

6.14 m

Step-by-step explanation:

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3 years ago

Is the length of the hypotenuse of a right triangle with legs that mea-

icang [17]

Answer:
Irrational Number

Step-by-step explanation:
So, since it's a right triangle, you can use Pythagorean Theorem to calculate the measure of the hypotenuse.

Pythagorean Theorem says the hypotenuse squared = the sum of the sides squared.

5² + 6² = 25 + 36 = 61

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2 years ago

If X =4 in., find the area of the trapezoid in problem 22

Digiron [165]

Answer:

Need a picture of the problem.

Step-by-step explanation:

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