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
Hatshy [7]
3 years ago
11

Simplify the expression.13[6^2/(5^2-4^2)+9] 181 169 26 585

Mathematics
1 answer:
Zina [86]3 years ago
7 0
So 5^2 -4^2 is 25-16 which is 9
6^2/9 is 36/9 which is 4 +9 is 13
13(13) is 169
You might be interested in
The thickness of each type of coin is shown in the table. How much thicker is stack of dollars worth of nickels than a dollars w
Lilit [14]
Let our basis be worth 1 dollar. A nickel's worth is $0.05. In order to come up with $1, the number of nickels should be:

Number of nickels = $1 * 1 nickel/$0.05 = 20 nickels
Thickness of 20 nickels = 20 nickels * 1.95 mm = 39 mm

Let's do the same for the quarters. Each quarter is worth $0.25.

Number of quarters = $1 * 1 quarter/$0.25 = 4 quarters
Thickness of 4 quarters = 4 quarters * 1.75 mm = 7 mm

Find the ratio of the two:
39 mm/7 mm = 5.57

Therefore, a stack of nickels is 5.57 times thicker than a stack of quarters worth one dollar.
7 0
3 years ago
A high school student took two college entrance exams, scoring 1070 on the SAT and 25 on the ACT. Suppose that SAT scores have a
antoniya [11.8K]

Answer:

Due to the higher z-score, he did better on the SAT.

Step-by-step explanation:

When the distribution is normal, we use 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.

Determine which test the student did better on.

He did better on whichever test he had the higher z-score.

SAT:

Scored 1070, so X = 1070

SAT scores have a mean of 950 and a standard deviation of 155. This means that \mu = 950, \sigma = 155.

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

Z = \frac{1070 - 950}{155}

Z = 0.77

ACT:

Scored 25, so X = 25

ACT scores have a mean of 22 and a standard deviation of 4. This means that \mu = 22, \sigma = 4

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

Z = \frac{25 - 22}{4}

Z = 0.75

Due to the higher z-score, he did better on the SAT.

8 0
3 years ago
Select from the drop-down menus to correctly complete the sentence. The probability of a compound event is a number between 1.__
scoray [572]
The probability of any event is between 0 and 1. 0 means impossible and 1 means certain.

It could also be written with the percents: 0% and 100%.
5 0
3 years ago
Read 2 more answers
Giving triangle and m what is m >b
Gelneren [198K]

Since you know the triangles are congruent/equal, you know that:

m∠A and m∠X are congruent and have the same angle, and so does:

m∠B and m∠Y

m∠C and m∠Z

A triangle is 180°. (the 3 angles have to add up to 180) To find m∠B, you can do this:

m∠A + m∠B + m∠C = 180°

21° + m∠B + 35° = 180°    Subtract 21 and 35 on both sides

m∠B = 124° your answer is C

6 0
3 years ago
Find roots of the equation and state the multiplicity
olya-2409 [2.1K]

({x + 2})^{3}  =  {x}^{3}  + 6 {x}^{2} + 12x + 8
so the answer is
x =  - 2

7 0
3 years ago
Other questions:
  • Write a problem to represent 6 divided by 1/5
    12·1 answer
  • Can someone help me !!
    6·2 answers
  • An someone please help !!!
    6·1 answer
  • Tell whether x and y show direct variation. Explain your reasoning. y/x =8
    12·1 answer
  • 2.5 is 10% of what number?
    6·2 answers
  • Find the volume of the sphere. Either enter the exact terms of pi or use 22/7 for pi.The radius is 1/4 !
    10·1 answer
  • Pls help due asap <br> Thanks in advance
    6·1 answer
  • Convert 32% to a decimal <br><br> And convert 129% into a decimal
    5·1 answer
  • :
    9·1 answer
  • Help please I will give brainleist
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!