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Nana76 [90]
3 years ago
8

Write the expression: Add 2 and 4, then subtract 9

Mathematics
2 answers:
alexgriva [62]3 years ago
6 0
Anytime the word "then" is used it means that there will be parenthesis. So the equation will be (2+4)-9
marissa [1.9K]3 years ago
5 0
The expression is
(2+4)-9
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Q: How much did Jay have to pay excluding his share of the insurance premium?

A: $1800+$200 = $2000

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3 years ago
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The length, width and height of a rectangular prism is given as 15 cm, 10
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Its option C

Step-by-step explanation:

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3 years ago
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The school is 625 meters far from Alex house. It took him 15 minutes to go from home to school, and run back to home in 10 minut
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His average speed was 50 m/min
8 0
4 years ago
What is the measure, in degrees, of angle 1?
ra1l [238]

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Think simple.

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7 0
4 years ago
Find the first four positive values of arccos(0.7). I know how to get the first, but as for the rest, I am lost.
Mandarinka [93]
Now cos⁻¹(0.7) is about 45.6°, that's on the first quadrant.

keep in mind that the inverse cosine function has a range of [0, 180°], so any angles it will spit out, will be on either the I quadrant where cosine is positive or the II quadrant, where cosine is negative.

however, 45.6° has a twin, she's at the IV quadrant, where cosine is also positive, and that'd be 360° - 45.6°, or 314.4°.

now, those are the first two, but we have been only working on the [0, 360°] range.... but we can simply go around the circle many times over up to 720° or 72000000000° if we so wish, so let's go just one more time around the circle to find the other fellows.

360° + 45.6° is a full circle and 45.6° more, that will give us the other angle, also in the first quadrant, but after a full cycle, at 405.6°.

then to find her twin on the IV quadrant, we simply keep on going, and that'd be at 360° + 360° - 45.6°, 674.4°.

and you can keep on going around the circle, but only four are needed this time only.
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3 years ago
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