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2 years ago

Translate the phrase into an algebraic expression. w more than 9

Mathematics

1 answer:

lesantik [10]2 years ago

8 0

W+9 or 9+w would be the answer

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29+10j= -11 Find the value for j

Nezavi [6.7K]

29+10j= -11
29+10j - 29 = -11 - 29 (subtract 29 to both sides)
10j = -40
10j/10 = -40/10 (divide both sides by 10)
j = -4

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2 years ago

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A movie is 2hrs and 4 minutes long. The movie starts at 11:45am. When will the movie end?

dedylja [7]

The movie will end at 1:49 pm.

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Sandy bought a soft drink for 4 dollars and 9 candy bars. She spent

almond37 [142]

9c + 4 = 49

The numbers by themselves represent the amount of dollars spent (4 and 49), but since you don’t know the amount of money each candy bar cost, you would put the amount of candy bars and a variable next to it to then solve ($5 per bar)

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2 years ago

Angle x is a third quadrant angle such that cos x = -1/5.

Yuki888 [10]

Starting from the formula

$\cos^2(x)=\dfrac{1+\cos(2x)}{2}$

We can divide all the angles by 2 and we get

$\cos^2\left(\dfrac{x}{2}\right)=\dfrac{1+\cos(x)}{2}$

And finally

$\cos\left(\dfrac{x}{2}\right)=\pm\sqrt{\dfrac{1+\cos(x)}{2}}$

Angle x is a third quadrant angle, meaning that it is somewhere between 180 and 270. This implies that x/2 lies between 90 and 135. So, x/2 is a second quadrant angle, and its cosine is negative. This means that we can update the previous equation to

$\cos\left(\dfrac{x}{2}\right)=-\sqrt{\dfrac{1+\cos(x)}{2}}$

You know that

$\cos(x)=-\dfrac{1}{5}$

so, plug that value into the expression and you'll get cos(x/2).

4 0

2 years ago

15 lb for $13.35 what is the unit rate and what is the cost

Sedbober [7]

Answer:

$0.89/1 the cost is $0.89.

Step-by-step explanation:

cost over lb

13.35/15

unit rate means for 1 so divide 15 by 15 to get 1

what ever u do to the denominator do to the numerator so divide 13.35 by 15

13.35/15 divided by 15/15= 0.89/1

$0.89 for 1 lb

6 0

2 years ago