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Colt1911 [192]
3 years ago
15

Find the whole 25% of is 21

Mathematics
2 answers:
Nat2105 [25]3 years ago
5 0
25% of 84 is 21

21 divided by 25%=84
inna [77]3 years ago
3 0
49 is beacause 21/75=94
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What are the coordinates of the point (−1, 6) after a reflection across the x-axis?
Agata [3.3K]
The answer would be (-1,-6). Remember that the x-axis runs left to right and the y-axis runs up and down. Therefore, if you were to reflect it, just picture it being flipped over. If you go from (-1,+6) and you reflect it over the x-axis, both points are now in the bottom left quadrant where everything is negative. So, you get (-1,-6) The -1 doesn't change since it was already a -x value before and stayed in a negative area.
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3 years ago
The size of the largest angle in a triangle is 3 times the size of the smallest angle.
prohojiy [21]

Answer:

a = 29

b = 64

c = 87

Step-by-step explanation:

Let the angles be a (smallest), b, and c (largest).

We know that a triangle's angles must add up to 180 degrees, so we can construct the following equations.

a + b + c = 180

c = 3a

b = a +35

With some solving and substitution...

a + (a + 35) + c = 180

2a + c = 145

2a + (3a) = 145

5a = 145

a = 29

and therefore,

b = 29 + 35 = 64

c = 3(29) = 87

6 0
3 years ago
Read 2 more answers
A right triangle has an area of 2k^2-k-15 One of the legs has a length of k^2-9 What is the ratio of the area of a triangle to t
Darya [45]
<h3>Given</h3>

A = 2k² -k -15

L = k² -9

<h3>Find</h3>

A/L

<h3>Solution</h3>

\displaystyle\frac{A}{L}=\frac{2k^2-k-15}{k^2-9}=\frac{(k-3)(2k+5)}{(k-3)(k+3)}\\\\=\frac{2k+5}{k+3}

4 0
3 years ago
If f(x) = x/2 -3 and g(x) = 4x² + x - 4, find (f+ g)(x).
Shalnov [3]

Answer:

correct answer is : D. 42 + 3x - 7

4 0
2 years ago
What is mZCAD?<br> O 80°<br> O 20°<br> O 80°<br> O 100°<br> O 110°
denis23 [38]

Answer:

The angle of CAD is 100°.

Step-by-step explanation:

Given that total angles in a triangle is 180° so you will have to find the angle of CAB :

∠CAB + ∠ACB + ∠ABC = 180°

∠CAB + 80° + 20° = 180°

∠CAB + 100° = 180°

∠CAB = 180° - 100°

∠CAB = 80°

Next, you have to subtract it from 180° because straight line have a degree of 180°

∠CAD = 180° - 80°

∠CAD = 100°

3 0
3 years ago
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