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2 years ago

Which of the following is not a reason used in this proof?

Mathematics

1 answer:

Komok [63]2 years ago

8 0

Answer:

Reflexive

Step-by-step explanation:

Because C and D are right angles. That’s def of perpendicular. I’m not sure about the vertical angles but it’s shown in the proof

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The area of the parallelogram below is square meters. 9 m 7 m 2 m

max2010maxim [7]

Hmmm.... I’m afraid I don’t understand.

7 0

2 years ago

Spencer goes on a 5 hour work shift. After

romanna [79]

Answer:

18/5 hours or 3 3/5 hours

Step-by-step explanation:

I assume the break is at 7/5 hours.

5 hours - 7/5 hours = 25/5 hours - 7/5 hours = 18/5 hours = 3 3/5 hours

5 0

3 years ago

Which is the graph of f(x) = -(x+3)(x + 1)?

QveST [7]

Happy Pride Month!

Answer:

Option B

Step-by-step explanation:

Use Desmos graphing calculator for these probloms and type your qustion on the left box

6 0

2 years ago

Read 2 more answers

What are the values of sin α and tan α, if: cosα=0.6

olganol [36]

Positive cosine is first or fourth quadrant. So we don't know the sign of the sine or the tangent.

Everybody's favorite right triangle is 3/4/5 and here we have

$\left(\dfrac 3 5 \right)^2 + \left(\dfrac 4 5 \right)^2 = 1$

So if

$\cos \alpha = 0.6 = \dfrac 3 5$

then

$\sin \alpha = \pm \dfrac{4}{5} = \pm 0.8$

and

$\tan \alpha = \dfrac{\sin \alpha}{\cos \alpha} = \dfrac{\pm 0.8}{0.6}=\pm \dfrac 4 3$

6 0

3 years ago

Solve this equation 90x-60y is equal to 68 and 90x-70y is equal to 91

Tanzania [10]

Answer:

Step-by-step explanation:

90x - 60y = 68.....multiply by -1

90x - 70y = 91

---------------------------

-90x + 60y = -68 (result of multiplying by -1)

90x - 70y = 91

---------------------------add

-10y = 23

y = -23/10 <===

90x - 60y = 68

90x - 60(-23/10) = 68

90x + 138 = 68

90x = 68 - 138

90x = - 70

x = -70/90

x = -7/9 <=====

3 0

3 years ago

Read 2 more answers