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Masteriza [31]
3 years ago
13

Write an expression equivalent tox^2+6x-7x

Mathematics
1 answer:
ryzh [129]3 years ago
8 0
(X-1)(X+7)
Easy work uknow im saying
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If you ride your bike at an average speed of 15 mph, how long will it take you to ride to your grandparents’ home? Express your
saveliy_v [14]

Answer:

It will take you 0.24 hour to ride to your grandparents’ home

It will take you 14 minutes to ride to your grandparents’ home

Step-by-step explanation:

- Your average speed is 15 miles per hour

- The distance to grandmother home is 3.67 miles

- You need to know how long it will take you to do that

∵ Distance = speed × time

∵ Distance = 3.67 miles

∵ Speed = 15 miles per hour

- Substitute these values in the rule above

∴ 3.67 = 15 × time

- Divide both sides by 15 to find the time

∴ Time = 0.24 hour

* It will take you 0.24 hour to ride to your grandparents’ home

- You need to convert the time from hour to minutes

∵ 1 hour = 60 minutes

∵ Time = 0.24 hour

∴ Time = 0.24 × 60 = 14.4

∴ Time ≅ 14 minutes

* It will take you 14 minutes to ride to your grandparents’ home

5 0
3 years ago
Which answer is the approximate standard deviation of the data set?
Ierofanga [76]

Answer:  A. 6.5

Step-by-step explanation:

Here, the given set = { 15, 19 3, 12, 17, 2, 2, 8}

Mean, \overline{ x} = \frac{15+19+3+12+17+2+2+8}{8} = \frac{78}{8} = 9.75

Number of elements, n = 8

\frac{\sum (|x-\overline{x}|)^2}{n}=42.4375

Thus, the standard deviation, \sigma =\frac{\sqrt{\sum(|x-\overline{x}|)^2} }{n}=\sqrt{\frac{339.5}{8}}=\sqrt{42.4375} = 6.51440711\approx 6.5

⇒ Option A is correct.

4 0
3 years ago
Read 2 more answers
What is the slope and y-intercept of y > -x + 4?
lubasha [3.4K]

This is actually pretty straightforward since the equation is already in slope-intercept form.

Slope intercept form is y = mx + b, where m and b are constants that represent the slope and y-intercept, respectively.

m = -1 and b = 4 in this equation.

Thus, the slope is -1 and the y-intercept is 4.

7 0
3 years ago
Read 2 more answers
Can someone help me with questions 14,18,16??
Masja [62]

Answer:

13  all three angles =60 in total they equal 180

14) I believe x = 32.5 Am not sure though.

Step-by-step explanation:

That is the only question i can answer but to help you with this all triangles big or small the total of all the angles combined = 180

3 0
3 years ago
A) cos(2x- pi/3)= 1/ căn 3
motikmotik
It is c sin 3x(5cosx+6)=0
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