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nlexa [21]
3 years ago
14

What is x the missing side length in triangle DEF

Mathematics
1 answer:
larisa86 [58]3 years ago
4 0

Answer:

x = 9.75

Step-by-step explanation:

We know that Triangle ABC and DEF are congruent, therefore;

\frac{CB}{FE} = \frac{AB}{DE}<em />

\frac{12}{9 }=\frac{13}{x}

=> 12*x = 9*13

=> 12x = 117

=> x = 117 / 12

<u>=> x = 9.75</u>

Hope this helps!

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F(x) = 3x3 – 2x2 + x - 4 at x = -3
Yuri [45]

Steps to solve:

f(x) = 3x³ – 2x² + x; x = -3

~Substitute

f(-3) = 3(-3)³ - 2(-3)² + (-3)

~Solve the exponents

f(-3) = 3(-27) - 2(9) + (-3)

~Multiply

f(-3) = -81 - 18 - 3

~Subtract

f(-3) = -102

Best of Luck!

5 0
4 years ago
HELP WILL MARK BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
erica [24]
3/4 * h = 2 1/4
3/4* h * 4/3 = 9/4 * 4/3
h = 3
6 0
3 years ago
PLEASE IM BEGGING YOU HELP ME! ITS DUE SOON PLEASE ACTUALLY SHOW YOUR WORK :(( SOMEONE PLEASE OMG HELP NO ONES HELPING ME UGHHHH
anyanavicka [17]

Answer:

x=0, y=-12

Step-by-step explanation:

you can use substitution to solve for x

-3(x-12)=2x+36

-3x+36=2x+36

subtract 36 from both sides and add 3x to both sides

0=5x

x=0

now plug in 0 as x for either equation

y=0-12

y=-12

to check your work plug in x and y into the other equation

-3(-12)=2(0)+36

36=36

3 0
3 years ago
A boy standing between two pillars of equal height observes the angle of a
pashok25 [27]

Answer:

15m

Step-by-step explanation:

did the math

5 0
3 years ago
What value of x is in the solution set of 2(3x – 1) = 4x - 6?
Zarrin [17]

Answer:

x=-2

Step-by-step explanation:

2(3x – 1) = 4x - 6

Distribute

6x-2=4x-6

Moving like terms (4x)

2x-2=-6

Moving like terms (-2)

2x=-4

Divide both sides by 2 to isolate x

x=-2

Hope this helps! Please mark brainliest :)

4 0
4 years ago
Read 2 more answers
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