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Rainbow [258]
3 years ago
15

−2x−x+8 please help cant figure it out

Mathematics
1 answer:
Trava [24]3 years ago
4 0

Answer:

-3x+8

Step-by-step explanation:

−2x−x+8

Add the -2x to the -x and you get -3x.

-3x + 8 is the answer if you wrote your equation correctly...

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A colour palette at a paint store has 6 shades of blue. Kelsie is choosing 2 shades of blue to paint her room. How many pairs of
Law Incorporation [45]

Answer:

B.) 15

Step-by-step explanation:

The order in which the shades are chosen is not important. For example, choosing powder then sky is the same outcome as choosing sky then powder. So we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this question:

2 shades from a set of 6. So

C_{6,2} = \frac{6!}{2!(6-2)!} = 15

So the correct answer is:

B.) 15

8 0
3 years ago
Carla uses a compass and straightedge to construct perpendicular lines. Daryl uses technology to construct perpendicular lines.
devlian [24]
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6 0
3 years ago
Trigonometry please help! work need to be shown
padilas [110]

Answer:

x = 5.56

Step-by-step explanation:

Apply trigonometric function to find x

Reference angle = 46°

Hypotenuse = 8

Adjacent length = x

Apply CAH:

Cos 46 = Adj/Hyp

Cos 46 = x/8

8 × Cos 46 = x

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x = 5.56 (nearest hundredth)

7 0
3 years ago
Cos30° cos45°-sin30° sin 45°​
sammy [17]

Answer:

(√6 - √2)/4

Step-by-step explanation:

cos30°cos45° - sin30°sin45°

= cos (30 + 45)°

= cos 75°

= (√6 - √2)/4

4 0
3 years ago
The sum of 14 and a number is equal to 17
GREYUIT [131]
So..... 14 + 3= 17. I think. I mean, this is what I got from what I understand.
5 0
3 years ago
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