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brilliants [131]
3 years ago
13

6x + 7 = 3x - 8 What is it?

Mathematics
1 answer:
motikmotik3 years ago
4 0

Answer:

x = 5

Step-by-step explanation:

6x - 3x = 3

7 + 8 = 15

15/3 = 5

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

Have a good day :)

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If m∠D = 18°, and m∠C = 45°, what is mBC?<br><br> 108°<br> 63°<br> 54°<br> 125°
irga5000 [103]

Answer:

54 degrees

Step-by-step exp Mark Brainliest Pls

8 0
4 years ago
If the measures of two angles add up to 90
dsp73

Answer:

complementary angles

Step-by-step explanation:

If the measures of two angles add up to 90 then they are <u>complementary</u><u> </u><u>angles</u>

7 0
3 years ago
Help!! Thank you so much
zhenek [66]

Answer:

336 cm²

Step-by-step explanation:

rectangle area:

b×h = 24×7,5=180 cm²

" " = 6,5×24=156 cm²

total area: 180+156=336 cm²

3 0
3 years ago
What is the image of the point (8,4) after a rotation of 90° counterclockwise about the origin?<br>​
Alenkinab [10]
<h3>Answer:  (-4, 8)</h3>

=========================================================

Explanation:

The 90 degree counterclockwise rotation rule we use is

(x,y) \to (-y,x)

the x and y coordinates swap places, and we change the sign of the first coordinate after the swap.

After using that rotation rule, we would go from (8,4) to (-4, 8) which is the final answer.

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

Extra info (optional section):

Define the following three points

A = (0,0)

B = (8,4)

C = (-4,8)

Use the slope formula to find that AB and AC have slopes of 1/2 and -2 in that order.

Those slopes multiply to -1, since (1/2)*(-2) = -1. This is a property of any two perpendicular lines as long as neither line is vertical and neither is horizontal. So this is sufficient to prove that the lines are perpendicular. This further means that a 90 degree rotation has taken place.

3 0
3 years ago
Find the LCM of 132 and 60 using Prime Factorization ?
Sav [38]

Answer:

660

Step-by-step explanation:

First, let's find the prime factorization for both numbers.

132 = 11 x 12

12 = 3 x 4

4 = 2 x 2

<u>132 = 2 x 2 x 3 x 11</u>

60 = 5 x 12

12 = 3 x 4

4 = 2 x 2

<u>60 = 2 x 2 x 3 x 5</u>

Now, to find the lowest common multiple, we just need to multiply each number the most times it is seen in either number.

<u>132 = 2 x 2 x 3 x 11</u>

<u>60 = 2 x 2 x 3 x 5</u>

The first number is both is 2, which appears at most twice in either list so we will multiply two 2s to find the LCM.

Both numbers also have at most one 3, one 5, and one 11, so to find our LCM, we just need to multiply all these numbers together:

2 x 2 x 3 x 5 x 11 = 660

The LCM of 132 and 60 is 660.

Hope this helped!

4 0
3 years ago
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