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
Assoli18 [71]
2 years ago
13

What is the answer 3r =30

Mathematics
2 answers:
zhuklara [117]2 years ago
7 0

Answer:

r=10

Step-by-step explanation:

RUDIKE [14]2 years ago
5 0

Answer:

<h3>r = 10</h3>

Step-by-step explanation:

3r = 30 \\  \frac{3r}{3}  =  \frac{30}{3}  \\ r = 10 \\

You might be interested in
If two events are complementary, then we know that: Multiple Choice the sum of their probabilities is one. the joint probability
notka56 [123]

Answer:

The joint probability of the two events is one.

Step-by-step explanation:

Complementary events:

If two events are complimentary, these three following things are true:

They are dependent.

The intersection of them is zero.

The joint probability of the two events is one.

The last one is the correct choice.

3 0
3 years ago
Help with 5b please . thank you.​
Allushta [10]

Answer:

See explanation

Step-by-step explanation:

We are given f(x)=ln(1+x)-x+(1/2)x^2.

We are first ask to differentiate this.

We will need chain rule for first term and power rule for all three terms.

f'(x)=(1+x)'/(1+x)-(1)+(1/2)×2x

f'(x)=(0+1)/(1+x)-(1)+x

f'(x)=1/(1+x)-(1)+x

We are then ask to prove if x is positive then f is positive.

I'm thinking they want us to use the derivative part in our answer.

Let's look at the critical numbers.

f' is undefined at x=-1 and it also makes f undefined.

Let's see if we can find when expression is 0.

1/(1+x)-(1)+x=0

Find common denominator:

1/(1+x)-(1+x)/(1+x)+x(1+x)/(1+x)=0

(1-1-x+x+x^2)/(1+x)=0

A fraction can only be zero when it's numerator is.

Simplify numerator equal 0:

x^2=0

This happens at x=0.

This means the expression,f, is increasing or decreasing after x=0. Let's found out what's happening there. f'(1)=1/(1+1)-(1)+1=1/2 which means after x=0, f is increasing since f'>0 after x=0.

So we should see increasing values of f when we up the value for x after 0.

Plugging in 0 gives: f(0)=ln(1+0)-0+(1/2)0^2=0.

So any value f, after this x=0, should be higher than 0 since f(0)=0 and f' told us f in increasing after x equals 0.

8 0
2 years ago
Which is the initial value that shrinks an exponential growth function by 50%?
ValentinkaMS [17]
Suppose that the exponential growth function is  y = 4^x.

If x = 1, then y = 4^1 = 4.
If x = 3, then y = 4^3 = 64.

Let the initial value be 1/2.

The growth function is now y = 1/2 * 4^x.

If x =1, then y = 2 which is half of the y value before adding the 1/2.

If x = 3, then y = 1/2 * 64 = 32.

Answer: 1/2
7 0
3 years ago
Read 2 more answers
My question has been deleted I made a mistake
zysi [14]
Retype your question that way we can help answer
7 0
3 years ago
Read 2 more answers
A contractor buys 16 and 3/10 tons of sand and uses 8 and 4/5 tons.how much sand is left?
Andreas93 [3]

Answer:

7.5 short tons

Step-by-step explanation:

16 3/10 - 8 4/5 = 7.5

7 0
3 years ago
Read 2 more answers
Other questions:
  • Please help me this due soon
    11·1 answer
  • Sydney is going to a carnival that has games and rides
    6·2 answers
  • Help my math teacher created thistest and I don’t know how to do any of this
    6·1 answer
  • The number of bags of peanuts sold at the Kennedy Center from 1900 to 2004 can
    5·1 answer
  • Molly rewrote the equation as shown:
    7·2 answers
  • Find area and perimeter​
    9·1 answer
  • Helpppppppppppppppppppppppppppp
    8·2 answers
  • I've asked this question 3 times. HELP!!!!!
    12·2 answers
  • Which of the following is not a polynomial?
    5·1 answer
  • Find two consecutive whole numbers that 43 lies between
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!