3 years ago

How do I do this. I am not sure what I am doing in my class.

Mathematics

1 answer:

Varvara68 [4.7K]3 years ago

8 0

It is C, B, A, E, and J

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Evaluate the expression when x= -3.<br> x² – 7x+6

aksik [14]

Answer:

-6

Step-by-step explanation:

$3^{2}$ = -3 × -3

-3 × -3 = 9

7 × -3 =-21

9 - 21 +6 = -6

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3 years ago

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Nancy buys 15 m of ribbon. Her sister buys 6 m less ribbon but pays twice as much per metre. Together they pay R66. What is the

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I hope this helps you

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2 years ago

If you do 12 minutes of a 45 minute workout how many calories is it? (the 45 minutes is 1000 calories in total)

velikii [3]

Answer:

266 $\frac{2}{3}$

Step-by-step explanation:

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2 years ago

If sec theta = - √30 / 3, find cos theta.<br> if sin(-theta) = -0.97, find cos (π/2 - theta).

Cloud [144]

Step-by-step explanation:

$\cos \theta = \frac{1}{ \sec\theta } = - \frac{3}{ \sqrt{30} } = - \frac{3 \sqrt{30} }{30} = - \frac{ \sqrt{30} }{10}$

$\cos( \frac{\pi}{2} - \theta )= \cos \frac{\pi}{2} \cos \theta + \sin \frac{\pi}{2} \sin \theta$

Note that

$\sin( - \theta) = - \sin \theta$

$\cos \frac{\pi}{2} = 0 \: \: \: \: \: \sin \frac{\pi}{2} = 1$

Therefore,

$\cos( \frac{\pi}{2} - \theta ) = 0.97$

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3 years ago

Point A(1, 4) reflected over the line x = y. What is the coordinate of A’?

alisha [4.7K]

Answer:

I believe the answer is (-4,-1)

Step-by-step explanation:

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3 years ago