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
Sophie [7]
3 years ago
11

Can someone please help me with problem number 13. 14 ASAP

Mathematics
1 answer:
Tanya [424]3 years ago
4 0

Answer:

For 13: 13/30

Step-by-step explanation:

First simplify!

9x - 25 + 21x - 35 + 12 = 0

then simplify some more

9x + 21x = 30x

(-25) + (-35) + 21 + 12 = -13

30x - 13 = 0

now add 13 to both sides, 13 and -13 cancel each other out and it becomes

30x = 13

then you divide by 30 to get x by itself. 30 cancels itself out and you are left with 13/30 which doesn't simplify so that shod be your answer! I couldn't figure out 14 but I hope this helps!!!

You might be interested in
Solve the formula d = rt for t. A. t = rd B. t = d – r C. t = D. t =
tekilochka [14]

rt=d\qquad\text{divide both sides by}\ r\neq0\\\\\dfrac{rt}{r}=\dfrac{d}{r}\\\\\boxed{t=\dfrac{d}{r}}

3 0
3 years ago
Read 2 more answers
For each student in a certain class, a teacher adjusted the student's test score using the formula y = 0.8x + 20, where x is the
alexandr402 [8]

Answer:

Option B) 16

Step-by-step explanation:

We are given the following in the question:

y = 0.8x + 20

where x is the student's original test score and y is the student's adjusted test score.

We have to find the standard deviation of the adjusted test scores of the students in the class, if the standard deviation of the original test scores of the students in the class was 20.

We know that:

  • Adding a constant to each value in a data set does not change the value of the standard deviation.
  • Multiplying each value in a data set by a constant also multiplies the standard deviation by that constant.

Thus, if we add 20 to each data set then, the standard deviation does not change.

But multiplying each score by 0.8, changes the standard deviation 0.8 times.

Thus, we can write:

\text{Standard deviation of the adjusted test scores}\\ = \text{Standard deviation of the original test scores of the students}\times 0.8\\= 20\times 0.8\\= 16

Thus, standard deviation of adjusted score is 16.

5 0
3 years ago
What is the domain for y=7^x​
torisob [31]

Answer:

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined. The range is the set of all valid y values. Use the graph to find the range.

Step-by-step explanation:

Explanation: y=7 is a straight line with zero slope and y-intercept 7 as shown below. Hence its domain (all allowed x-values) is all real numbers, and its range (all allowed y-values) is only 7.

<em>I hope this helped~ <3</em>

<em>-Dream</em>

7 0
3 years ago
Read 2 more answers
What is the value of x?
Andru [333]

I'm sure you know the formula for Pythagoras Theorem.

The formula is a^{2} +b^{2} = c^{2}

C = Your hypotenuse

A + B = The other two adjacent sides.  

So you plug in the numbers

33^{2} + b^{2} =65^{2}

And you'll get the answer, which is 56.  

6 0
4 years ago
Read 2 more answers
The base of an open rectangular box is of length(2x+5)cm and width xcm.
Serhud [2]

Answer:

Wait what's your question? You just gave us information on a box.

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Calculate the total purchase order for the
    13·1 answer
  • What is the graph of the function rule y=-1/2x + 2
    11·1 answer
  • Ben used 325 centimeters of ribbon to trim banners he made. How many meters of ribbon did he use?
    7·2 answers
  • a pizza is cut into slices that are each 1/6 of the whole. John is going to eat 1/2 of the whole pizza​
    15·2 answers
  • The Game Stop is having a sale and all games are reduced by 55%. If a game is now $29.99, what was the original price? Round you
    15·1 answer
  • The length of one leg of a right triangle is 20 ft in the length of the hypotenuse is 52 ft what is the length of the other leg
    8·2 answers
  • Which expression represents the phrase "4 more than the product of 8 and n."
    9·1 answer
  • Which statement is true?
    10·1 answer
  • If there was only one government class, and Wes and Maureen were in that class of 38 students, what would be the probability tha
    11·1 answer
  • What is the measure of RCD?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!