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Elina [12.6K]
2 years ago
11

How do you write an algebraic expression for 42 decreased by twice some number

Mathematics
1 answer:
Shalnov [3]2 years ago
8 0
42 decreased by (-) twice (2 x ?) some number (n)

42 - 2n
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What is the slope of the line that passes through (1,4) and (1,-3)
svetlana [45]
Slope = (y2 - y1)/(x2 - x1)
slope = (-3 -4)/(1 - 1)
slope -7/0
This is an undefined slope because the denominator is 0.
This would be a vertical line.
7 0
3 years ago
A triangle with coordinates (6,4) (2,-1) and (-3,5) is translated 4 units left and rotated 180 degrees about the origin. What ar
kakasveta [241]
The correct answer is D) ( - 2 ,  - 4) , ( 2 , 1 ) , ( 7 ,  - 5 ) .
6 0
3 years ago
Suzanna walked two over seven of a mile in two over five of an hour. What is her unit rate in miles per hour?
Kruka [31]

Two sevenths over two fifths = five over seven mile per hour

The unit rate is 5 over 7 miles per hour

<em><u>Solution:</u></em>

Given that, Suzanna walked two over seven of a mile in two over five of an hour

We have to find the unit rate in miles per hour

Unit rate means number of miles covered in 1 hour

From given information,

Two over seven of a mile in two over five of an hour

Which means,

\frac{2}{7} \text{ miles } = \frac{2}{5} \text{ hour }

\text{ So she covered } \frac{2}{7} \text{ miles in } \frac{2}{5} \text{ hour }

To find for number of miles covered in 1 hour, divide the \frac{2}{7} \text{ by } \frac{2}{5}

\text{Unit rate in miles per hour } = \frac{\frac{2}{7}}{\frac{2}{5}}\\\\\text{Unit rate in miles per hour } = \frac{2}{7} \times \frac{5}{2} = \frac{5}{7}

Two sevenths over two fifths = five over seven mile per hour

Thus unit rate is 5 over 7 miles per hour

3 0
2 years ago
PLEASE HELP ASAP NO LINKS PLEASE An employee works as a veterinary assistant at a clinic making $31,840 per year. However, the c
forsale [732]

Answer: 40,260

Step-by-step explanation:

72,100-31,840=40,260

6 0
2 years ago
If 3 is added to a number and the sum is tripled​, the result is 21 more than the number. find the number.
zavuch27 [327]
<span>If 3 is added to the number: x + 3
b) ...and the sum is tripled.. 
"The sum" is "x + 3" so: 3(x+3)
c) ...the result is 27 more than the number.
27 more than the number is x + 27 
d) Put it all together:
3(x + 3) = x + 27 
Solve for x: 
1) Distribute the left side of the equation:
3x + 9 = x + 27

2) Subtract x from each side of the equation:
2x + 9 = 27
3) Subtract 9 from each side of the equation:
2x = 18
4) Solve for x:
x = 9 
Check: 
1) x = 9
2) 3(x + 3) = x + 27
3) 3 ([9] + 3) = [9] + 27
4) 3(12) = 9 + 27
5) 36 = 36 

So, therefore The answer is correct</span>
7 0
3 years ago
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