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disa [49]
3 years ago
6

Which expression is equivalent to 18x2 – 50?

Mathematics
1 answer:
kondor19780726 [428]3 years ago
6 0

Answer:

(3) 2(3x - 5)(3x + 5)

Step-by-step explanation:

18 {x}^{2}  - 50 \\  = 2(9 {x}^{2}  - 25) \\  = 2(3x - 5)(3x + 5)

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The graph shows a proportional relationship between the number of kilometers traveled by a bicycle (y) and the number of minutes
yaroslaw [1]

The unit rate of the bicycle is 0.3 kilometers per minute.

<h3>Linear equation</h3>

A linear equation is in the form:

y = mx + b

where y, x are variables, m is the rate of change and b is the y intercept (initial value of y).

Let y represent the km travelled by the bicycle after x minutes. From the graph using the point (0, 0) and (40, 12), hence:

Unit rate (m) = (12 - 0)/(40 - 0) = 0.3 km/min

The unit rate of the bicycle is 0.3 kilometers per minute.

Find out more on Linear equation at: brainly.com/question/14323743

6 0
3 years ago
How many solution does this have and how do you solve it
Vadim26 [7]

Answer:

Infinite solutions

Step-by-step explanation:

To determine the number of solutions a system has, you need its slope. If the slopes are the same, check if the equations are equivalent or not.

To find the slope, rearrange the equation to isolate "y", which makes it slope-intercept form y = mx + b.

"x" and "y" represent points on the line.

"m" represents the slope, which is how steep a line is.

"b" represents the y-intercept (where the graph hits the y-axis).

Isolate "y" in both equations:

x + 3y = 0

3y = -x        Subtract 'x' from both sides

y = -x/3        Divide both sides by 3.

y = -\frac{1}{3}x

The slope is -1/3.

9y = -3x

y = -3x/9        Divide both sides by 9

y = -\frac{3}{9}x        Reduce the fraction to lowest terms

y = -\frac{1}{3}x

The slope is -1/3, but the two equations are the same.

Since the equations are the same, or <u>equivalent</u>, the two lines are always touching. The solution of a system means where two lines intersect, or meet. Therefore, <u>there are infinite solutions</u>.

5 0
3 years ago
I need to show .y work for 132 × 3​
Lelechka [254]

Answer:

132 × 3 = 396

Step-by-step explanation:

132 3 × 2 = 6

<u>×</u><u> </u><u> </u><u>3</u> 3 × 3 = 9

396 3 × 1 = 3

7 0
3 years ago
Read 2 more answers
A pair of shoes has an original price of $65 but is on sale for a 20 percent discount. What number can you multiply by $65 to ge
Contact [7]

Answer:

0.8

Step-by-step explanation:

20 / 100 = 0.2

1 - 0.2 = 0.8

5 0
3 years ago
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What is the life expectancy of a circulating bill
Diano4ka-milaya [45]

Answer:

The life expectancy of a circulating coin is 25 years. The life expectancy of a circulating dollar bill is only 1/20 as long.

Step-by-step explanation:


3 0
3 years ago
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