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natima [27]
3 years ago
7

Y=2x-1 is the point with coordinates (5,11) on the line y=ex-1? true or false

Mathematics
1 answer:
Arada [10]3 years ago
3 0

Answer:

False

Step-by-step explanation:

Here, we want to check if the point given is on the line

To get this, we simply proceed to substitute the point given into the equation

Thus, we have;

11 = 2(5) - 1

11 = 10-1

11 is not equal to 9

Since these are not equal, then the point is not on the line

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Alexis washes 10 1/2 windows in 3/4 hours. At this rate, how many windows can she wash in one hour?
Zepler [3.9K]

Alexis can wash a total of 14 windows in 1 hour

<h3><u>Solution:</u></h3>

Given that Alexis washes 10\frac{1}{2} windows in \frac{3}{4} hours

<u><em>To find: </em></u>number of windows washed in one hour

To simplify the calculations we will convert the given mixed fraction to improper fraction

\begin{array}{l}{=10 \frac{1}{2}} \\\\ {=\frac{2 \times 10+1}{2}} \\\\ {=\frac{21}{2}=10.5}\end{array}

Hence, to wash 10.5 windows, Alexis takes 0.75 hours

Let "n" be the number of windows washed in 1 hour

10.5 windows ⇒ 0.75 hours

"n" windows ⇒ 1 hour

By cross-multiplication we get,

n \times 0.75 = 10.5 \times 1

n = \frac{10.5}{0.75} \\\\n = 14

Thus Alexis can wash 14 windows in one hour

4 0
3 years ago
Alexandra bought a hat that costs 14 dollars and a watch that costs 6 dollars. At the counter she received a discount. If she pa
leonid [27]

Answer:

It was a 25% discount

Step-by-step explanation:

25 percent of 20 is 5. You subtract 5 from 20 and get 15.

I hope this helps.

6 0
3 years ago
If the area of a circle measures 25 pi cm², what is the circumference of the circle in terms of pi?
jeyben [28]

Answer:

10π cm

Step-by-step explanation:

Given

Area of the circle=25π cm^2

Solution

πr^2=25π

r^2=25

r=√25

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So circumference of the circle=2πr

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So the answer is 10π cm

8 0
3 years ago
Write down tower more multiples with the answer of 33.642
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Answer:

Step-by-step explanation:

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How much cardboard needed to construct a rectangular prism measuring 15 inches by 13 inches by 7 inches
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1,365

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