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Vaselesa [24]
3 years ago
6

Factor this expression: 12 + 20

Mathematics
1 answer:
liberstina [14]3 years ago
5 0

Answer:

<h2>12 + 20 = 4 × (3 + 5)</h2>

Step-by-step explanation:

12 = 4 × 3

20 = 4 × 5

12 + 20 = 4 × 3 + 4 × 5 = 4 × (3 + 5)

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Can someone please help out? I’m stuck on this question and can’t figure it out for the life of me
Mumz [18]

The measure of angle A will be 61°

The sum of A and B is 122°

The sum of A B and C is 151°

<h3>How to calculate the angle?</h3>

It should be noted that complementary angles have an angle of 90°.

Therefore, the value of A will be:

= 90° - 29°

= 61°

The value of B will be:

= 90° - 29 = 61°

The value of A and B will be:

= 2 × 61°

= 122°

The value of A B and C will be:

= 122 + 29

= 151°

Learn more about angles on:

brainly.com/question/25716982

#SPJ1

6 0
1 year ago
If 20.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 37.5 mL of 0.124 M HCl, what is the concentration of the C
Cloud [144]
The balanced chemical reaction is:

<span>Ca(OH)2 + 2 HCl = 2 H2 O + CaCl2
</span>
We are given the amount of hydrochloric acid to be used in the reaction. This will be the starting point for the calculations.

0.124 mol HCl / L soln ( .0375 L solution) ( 1 mol Ca(OH)2 / 2 mol HCl) / 0.020 L Ca(OH)2 solution = 0.12 mol / L Ca(OH)2 = 0.12 M
7 0
4 years ago
What is an equation of the line that passes through the points (4, 4) and (8, 1)?
geniusboy [140]

Answer: y = -3/4x + 7

Step-by-step explanation:

first find slope:

y2-y1 / x2 - x1

1-4 / 8-4

-3/4

now just plug the slope (m) into the equation of a line using one of the points to find the y intercept

ill use (8,1)

1 = (-3/4)(8) + b

now solve :)

1 = -6 + b

7 = b

so now plug in the slope and the y intercept into the slope intercept form to find the equation of the line

y = -3/4x + 7

3 0
3 years ago
A combination lock requires a user to select three numbers to unlock it, where all three numbers are between 1 to 30, inclusive,
Sonbull [250]

Answer:

\frac{1}{270}=0.00370

Step-by-step explanation:

As the numbers are only between 1 and 30

Total number of possible combinations = 30×30×30 = 27000

If there are 100 attempts then

\text{P (someone guesses correct)}=\frac{\text{Number of attempts}}{\text{Total number of possible combinations}}\\\Rightarrow \text{P (someone guesses correct)}=\frac{100}{27000}\\\Rightarrow \text{P (someone guesses correct)}=\frac{1}{270}=0.00370

∴ Probability someone can guess the correct combination given 100 attempts is \mathbf{\frac{1}{270}=0.00370}

5 0
3 years ago
What is the square root of 383748
dybincka [34]
<span>619.473970397 here is the square root</span>
8 0
3 years ago
Read 2 more answers
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