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mart [117]
3 years ago
10

Expand- 2.5( - 3+ 4n + 8)

Mathematics
2 answers:
Ivan3 years ago
7 0

Answer:

10n + 12.5

Step-by-step explanation:

Maslowich3 years ago
5 0

Can someone just report me?

I didn't mean to write an answer-

I promise you, I was trying to write the answer but I double clicked

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Can a percent be greater than 100%? Select a true statement from the following choices.
soldi70 [24.7K]

Answer:

the answer is b.

Step-by-step explanation:

7 0
3 years ago
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
Juliette [100K]

Answer:

0.83 mi/min

Step-by-step explanation:

Start with 80 km/hr.  Convert this to the units miles/hr:

(80 km/hr)(1 mile/1.6 km) = 50 miles/hr

Next, apply the equality 60 min / 1 hr = 1 to 50 miles/hr:

50 miles.      1 hr

------------- * ------------ = 5/6 mi/min, or 0.83 mi/min

     hr          60 min

6 0
3 years ago
Read 2 more answers
write the equation of the line that passes through the point (2,-3) and is perpendicular to the line y=-2x+3. And how do you fin
pogonyaev

Answer:

y=2x-7

Step-by-step explanation:

The easiest way to answer this would be by using the slope-intercept form equation, y=mx+b. In this case, we can use our given in information to plug in values and find the equation.

Firstly, let's assess what know and what we don't:

Given the point (2,-3), we know that x=2 and y=-3. Now the slope for a perpendicular line can be found using a negative reciprocal, since the product of the slopes of both lines should equal -1. Therefore the slope must be 2.

All that's left is b, the y-intercept. To solve for this, we simply plug in what we have.

y=mx+b

-3=2(2)+b

-3=4+b

-3-4=b

-7=b

Now that we have b, we can write the equation:

y=2x-7

3 0
3 years ago
H(x)=x^2-4x+1 find axis of symmetry
Tresset [83]

Answer:

the answer is x=2

I used math-way

7 0
4 years ago
The swimming pool is open when the high temperature is higher than 20∘C. Lainey tried to swim on Monday and Thursday (which was
Sergeeva-Olga [200]

Answer:

30-3d\leq 20

Step by step explanation:

Let d represent the rate of temperature decrease in degrees Celsius per day from Monday to Thursday.  

As temperature decreased at a constant rate in the next 3 days, so the rate of temperature will decrease 3d degree Celsius in 3 days.  

We are told that the pool was open on Monday. The high temperature was 30^oC on Monday. So the decrease in temperature from Monday to Thursday will be 30-3d.

We have been given that the swimming pool is open when the high temperature is higher than 20^oC.

As the pool was closed on Thursday. This means that temperature on Thursday was less than or equal to 20 degree Celsius. We can represent this information in an inequality as:

30-3d\leq 20

Therefore, the inequality 30-3d\leq 20 can be used to determine the rate of temperature decrease in degrees Celsius per day, d, from Monday to Thursday.

7 0
3 years ago
Read 2 more answers
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