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
sasho [114]
2 years ago
14

Solve for x. 4(x - 1) + 3x = 31*

Mathematics
1 answer:
lisabon 2012 [21]2 years ago
6 0

Answer:

x=5

Step-by-step explanation:

4(−1)+3=31

4−4+3=31

You might be interested in
If a triangle has sides that are 21 and 6 what is the range for third side x?
VikaD [51]

Answer:

15<x<27

Step-by-step explanation:

Rule for the sides of a triangle:

The sum of the two smallest sides of a triangle must be greater than the biggest side.

In this question:

Sides of 6, 21 and x. We have to find the range for x.

If 21 is the largest side:

Two smallest are 6 and x.

x + 6 > 21

x > 21 - 6

x > 15

If x is the largest side:

Two smallest and 6 and 21. So

21 + 6 > x

27 > x

x < 27

Then

x has to be greater than 15 and smaller than 27. So the answer is:

15<x<27

8 0
3 years ago
Manuel bought a balloon (that is a perfect sphere) with a radius of 2 cm. He wanted his balloon to be bigger, so he blew 2 big b
horsena [70]
What is the question asking?
5 0
3 years ago
Read 2 more answers
What is the sample space for a spinner with four equal sections, numbered 1 to 4?
aev [14]
1-1, 1-2, 1-3, 1-4 and u should Change it to middle school
3 0
3 years ago
Read 2 more answers
9. Gold miners in Alaska have found, on average, 12 ounces of gold per 1000 tons of dirt excavated with a standard deviation of
netineya [11]

Answer:

9.18% probability the miners find more than 16 ounces of gold in the next 1000 tons of dirt excavated

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 12, \sigma = 3

What is the probability the miners find more than 16 ounces of gold in the next 1000 tons of dirt excavated?

This is 1 subtracted by the pvalue of Z when X = 16. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{16 - 12}{3}

Z = 1.33

Z = 1.33 has a pvalue of 0.9082

1 - 0.9082 = 0.0918

9.18% probability the miners find more than 16 ounces of gold in the next 1000 tons of dirt excavated

5 0
3 years ago
Meg used this table to track the average attendance from month to month at her theater for five months. A 5-column table with 1
White raven [17]

Answer:

B - Her monthly average would have increased by $19.57. ... Katie works as a waitress and records her monthly tips in the table shown below. If Katie decided not to work the month of November, how would her five month average compare to her six month ... Lisa is currently taking physics as one of her electives in school.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • List 3 values that would make this inequality true 4n &lt;_ 12
    14·1 answer
  • Using Cramer's rule to solve linear systems.
    10·1 answer
  • What is the exact circumference of the circle?
    5·1 answer
  • Simplify using the distributive property, Show all work (-2x - 9)(-4).
    10·1 answer
  • 5x^2-7x=4x^2-10 solve
    6·1 answer
  • What is 4 1/2 - 3 5/4 = but don’t find the quotient I need an estimate!!?
    9·1 answer
  • The surface area of a cylinder
    14·1 answer
  • DE is parallel to AC. Find the measure of angle x and z. Explain how you know.
    7·1 answer
  • PLEASE BEFORE I SAY ANYTHING NO LINKS AND I MEAN IT
    6·1 answer
  • Please help I'm stuck​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!