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4 years ago

If AC = 20 centimeters, and BC = 16 centimeters, which does AB equal?

Mathematics

2 answers:

11111nata11111 [884]4 years ago

6 0

Answer:

B. 12

Step-by-step explanation:

frosja888 [35]4 years ago

3 0

What's the type of the triangle?

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(-7.5) + (-5.3) (-1.9)

Lisa [10]

Answer:

2.57

Step-by-step explanation:

You first have to multiply the -5.3 times the -1.9. Once you do that, you get 10.07. Then, you add the -7.5.

Here are the equation steps:

(-7.5) + (-5.3)x(-1.9)

(-7.5) + (10.07)

2.57

6 0

3 years ago

When f(x) = 2x 2 + 3, find f(-3).<br> -15<br> 21<br> 39

notsponge [240]

Answer:

Step-by-step explanation:

f(x) = 2x^2 + 3

f(-3) = 2(-3)^2 + 3

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

f(-3) = 18 + 3

f(-3) = 21

6 0

3 years ago

NEED NOW!!

Vesnalui [34]

А??????????????????........

6 0

3 years ago

The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +

lianna [129]

You have a system of equations $\left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right.$ .

1. Substitude right side of second equation into the left side of the first equation: $-6x+6=-x^2+2x-9$ .

2. Solve this equation:
$x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4, \\ \sqrt{D}=2, \\ x_{1,2}=\dfrac{8\pm 2}{2 } =3,5$ .

3. Find y:
for $x_1=3, y_1=-6\cdot 3+6=-18+6=-12$ ,
for $x_2=5, y_2=-6\cdot 5+6=-30+6=-24$ .

4. The solutions of the system are: (3,-12) and (5,-24).
Answer: Correct choice is A.

7 0

4 years ago

Read 2 more answers

Please help with problem

KatRina [158]

-3
Step by Step guide
$y = \frac{3}{2} ( - 4) + 3$
$y = - 6 + 3$
$y = - 3$

5 0

3 years ago