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matrenka [14]
3 years ago
8

Can someone help me? ​

Mathematics
1 answer:
LenKa [72]3 years ago
7 0

Answer:

i dont know this but use the app Socratic. You can download it on your phone. Take a picture of the problem, crop it then press enter. It will pull up a bunch of websites with the answer and teach you how to do the problem. HOPE THIS HELPS!!!! mark brainliest plz

Step-by-step explanation:

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A train is traveling at a constant speed and goes a distance of 7 1/2 kilometers in 6 minutes the train will continue at this sp
Alla [95]

Answer:

392939939393939399393939393

Step-by-step explanation:

7 0
3 years ago
Why is it important to know whether a number is positive or negative
san4es73 [151]

its good to know if a number is positive or negative because something as simple as forgetting the signs such as - + could drastically change your answer

6 0
3 years ago
Dr. Cheeks tries to run at least 45 rotations on her hamster wheel each week. She has already run 6 rotations. Which inequality
IRISSAK [1]

Answer: C. r+6>45

Step-by-step explanation:

Since, Dr. Cheeks tries to run at least 45 rotations on her hamster wheel each week.

If she runs r rotations then, for the value of r,  45\leq r

Since, If she has already 6 rotations

Therefore total rotation she has = r+6

Thus, if 45\leq r ⇒45

So, Option C is the correct option.




4 0
3 years ago
Read 2 more answers
A woman invests a total of $20,000 in two accounts, one paying 2.5% and the other paying 8% simple interest per year. Her annual
djverab [1.8K]
Let's have a variable for each rate
x = account 1 (2.5% rate of interest)
y = account 2 (8% rate of interest) 

The formulas we need are: 
0.025x + 0.08y = 830 (amount of interest paid) 
x + y = 20 000 (combined amount invested) 

To solve we will use substitution (isolate for one variable and plugging into the other formula): 
x + y = 20 000
x = 20 000-y

0.025x + 0.08y = 830
0.025(20 000-y) + 0.08y = 830
500-0.025y+0.08y=830
500+0.055y=830
0.055y=330
y=6000

Now that we know y (the 2nd account) = $6000 we need to find x. We do this by using the previous formula.
x = 20 000-y
x=20 000 - 6000
x=14000

She invested $14 000 at a 2.5% interest rate and $6 000  at a 8% interest rate.

*Notes:
the percentages were converted into decimal form
you check your answer by plugging the numbers back into the 2 formulas we made

3 0
4 years ago
Use the graph of y = csc x to find all values of x, 0 ≤ x ≤ 2π, for which the following is true. (Enter your answers as a comma-
Zina [86]
Cosecant (csc) is defined as the reciprocal of sine, therefore: 
y = cscx \\
y = \frac{1}{sinx}. 

1/sinx will be undefined when the denominator sinx = 0.

Recalling the unit circle, sinx = 0 at x = 0 ± πn, where n is an integer.

Since the domain x is restricted from (0, 2π), we only consider the values x = 0, x = π, and x = 2π.

Therefore in the domain 0 ≤ x ≤ 2π, y = csc(x) will be undefined at x = 0, x = π, and x = 2π.
3 0
4 years ago
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