1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elis [28]
3 years ago
9

Simplify -2+5(2+6r) I’ll mark brainlist

Mathematics
1 answer:
Dmitriy789 [7]3 years ago
6 0

Answer:

10+30r

Step-by-step explanation:

-2+5(2+6r)

expand 5(2+6r)

5x2=10

(6r)x(5)=30r

so it is 10+30r

then add that to -2

8+30r

Hope that helps :)

You might be interested in
15 POINTS!!!
Musya8 [376]

Answer:

9420 ft

Step-by-step explanation:

First find the circumference to find the distance around

C = 2 * pi *r

C = 2 * 3.14 * 15

   94.2

Then it makes 100 revolutions

94.2*100 =9420

4 0
3 years ago
Read 2 more answers
You always need some time to get up after the alarm has rung. You get up from 10 to 20 minutes later, with any time in that inte
Mama L [17]

Answer:

a) P(x<5)=0.

b) E(X)=15.

c) P(8<x<13)=0.3.

d) P=0.216.

e) P=1.

Step-by-step explanation:

We have the function:

f(x)=\left \{ {{\frac{1}{10},\, \, \, 10\leq x\leq 20 } \atop {0, \, \, \, \, \, \,  otherwise }} \right.

a)  We calculate  the probability that you need less than 5 minutes to get up:

P(x

Therefore, the probability is P(x<5)=0.

b) It takes us between 10 and 20 minutes to get up. The expected value is to get up in 15 minutes.

E(X)=15.

c) We calculate  the probability that you will need between 8 and 13 minutes:

P(8\leq x\leq 13)=P(10\leqx\leq 13)\\\\P(8\leq x\leq 13)=\int_{10}^{13} f(x)\, dx\\\\P(8\leq x\leq 13)=\int_{10}^{13} \frac{1}{10} \, dx\\\\P(8\leq x\leq 13)=\frac{1}{10} \cdot [x]_{10}^{13}\\\\P(8\leq x\leq 13)=\frac{1}{10} \cdot (13-10)\\\\P(8\leq x\leq 13)=\frac{3}{10}\\\\P(8\leq x\leq 13)=0.3

Therefore, the probability is P(8<x<13)=0.3.

d)  We calculate the probability that you will be late to each of the 9:30am classes next week:

P(x>14)=\int_{14}^{20} f(x)\, dx\\\\P(x>14)=\int_{14}^{20} \frac{1}{10} \, dx\\\\P(x>14)=\frac{1}{10} [x]_{14}^{20}\\\\P(x>14)=\frac{6}{10}\\\\P(x>14)=0.6

You have 9:30am classes three times a week.  So, we get:

P=0.6^3=0.216

Therefore, the probability is P=0.216.

e)  We calculate the probability that you are late to at least one 9am class next week:

P(x>9.5)=\int_{10}^{20} f(x)\, dx\\\\P(x>9.5)=\int_{10}^{20} \frac{1}{10} \, dx\\\\P(x>9.5)=\frac{1}{10} [x]_{10}^{20}\\\\P(x>9.5)=1

Therefore, the probability is P=1.

3 0
3 years ago
The radius of a circular rug is 5 feet. How much ribbing will you need to buy to go around the
leonid [27]

The length around the rug is the circumference.

The formula is C = 2 x PI x r

C = 2 x 3.14 x 5 = 31.4 feet

5 0
3 years ago
Read 2 more answers
I need an answer what is 1.03 ÷ (-10.3)=?
Sloan [31]
The answer is - \frac{1}{10}
To figure this out,  convert both numbers to fractions. 1.03 = 1\frac{3}{100} and (-10.3) = -10\frac{3}{10}. Now, convert to improper fractions. 
 1\frac{3}{100}  = [tex] \frac{103}{100}
-10\frac{3}{10} = - \frac{103}{10}
Now, divide. Dividing fractions is the same as multiplying by the reciporical. So:
-\frac{103}{10}  \ becomes\  \frac{10}{103}
\frac{103}{100} *- \frac{10}{103} =  -\frac{1030}{10300} = - \frac{1}{10}
5 0
3 years ago
An ulcer patient has been told to avoid acidic foods. If he drinks coffee, with a pH of 5.0, it bothers him, but he can tolerate
kirill [66]
The equation should look like :
[H+] = (1-a)(x) + (a)(y)
Where:
5.8 = -log [H+]
5.0 = -log x 
6.9 = -log y 
(1-a) = proportion of x
<span>a = proportion of y
so calculating a will give you the result of how many ounces are required</span>
3 0
3 years ago
Other questions:
  • Find the side length or angle measure. Round answer to the nearest tenth.
    8·2 answers
  • A film set designer is using white and colored tiles in a pattern to create paths of different lengths. If x is the length of th
    7·1 answer
  • Where is point A located on the coordinate plane?
    11·1 answer
  • Lunch break is 1 1/4 hours long<br> Lunch break ends at 1:30pm<br> At what time does it start?
    5·1 answer
  • Which of the following are equivalent to 85%? Choose all that apply
    6·2 answers
  • I got $25 for my birthday. im saving $40 each week. i need $210. how long will it take to save up?
    15·2 answers
  • B. Directions: Write the correct unit abbreviation of the following:
    14·1 answer
  • Which of these inequalities has no solutions?
    15·1 answer
  • Find each probability a coin landing heads up on every toss when it is tossed 3 times
    13·2 answers
  • The sum of two numbers is 60 and the difference is 6. What are the numbers?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!