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
Katyanochek1 [597]
2 years ago
9

Evaluate the expression 2-8 × 2-7=

Mathematics
1 answer:
Nady [450]2 years ago
7 0

Answer:

-21

Step-by-step explanation:

2-8 × 2-7 = 2-(8×2)-7

= 2-16-7

=-14-7

=-21

You might be interested in
Mathematical Statistics with Applications Help Homework
Mars2501 [29]

7.43: Let X denote the random variable for height and \overline X for the sample mean. Then if \mu is the mean of

So the probability that the difference between the sample and population means does not exceed 0.5 inch is

P(|\overline X-\mu|\le0.5) = P\left(\left|\dfrac{\overline X-\mu}{0.25}\right|\le\dfrac{0.5}{0.25}\right) = P(|Z|\le 2) \approx \boxed{0.95}

per the empirical or 68/95/99.7 rule.

7.44: For a sample of size <em>n</em>, the sample standard deviation would be \frac{2.5}{\sqrt n}. We want to find <em>n</em> such that

P(|\overline X-\mu| < 0.4) = 0.95

Comparing to the equation from the previous part, this means we would need

\dfrac{0.4}{\frac{2.5}{\sqrt{n}}} = 0.16\sqrt n = 2 \implies \sqrt n = 12.5 \implies n = 156.25

so a sample of at least 157 men would be sufficient.

7 0
3 years ago
The difference of a and b is?
Yakvenalex [24]
A-b
difference means subtract
8 0
3 years ago
After distributing, which equation is equivalent to -4(3x + 2) = 10a.-12x -8 = 10b.-12x + 8 = 10c.-12x -6 = 10d.-12x + 6 = 1
rodikova [14]

Answer:

Option A: -12x-8=10 is the correct answer.

Step-by-step explanation:

Given equation is:

-4 (3x+2) = 10

We will distribute the equation by multiplying the terms inside the brackets with -4.

Therefore,

-4*3x + 2*-4 = 10

-12x +(-8) = 10

-12x - 8 = 10

The equation -4 (3x+2) = 10 will become -12x-8=10 after distributing.

Hence,

Option A: -12x-8=10 is the correct answer.

5 0
3 years ago
there are 650, of that 650 48% do go, 44% doesn't go, how many students are not sure they will attend?
Katarina [22]
44% + 48% = 92%
48% go, 44% dont go...so thats 92% that either go or dont go....leaving u with 8% unsure 
0.08(650) = 52 are not sure they will attend
5 0
3 years ago
Read 2 more answers
7) The table shows the cost to play at Mini-golf Course A. The equation y = 4x + 5 models the cost (y) to play x games at Mini-g
LenKa [72]

Answer:

The answer is A.

Step-by-step explanation:

took the test im positive

3 0
2 years ago
Other questions:
  • Could two lines with negative slope be perpendicular? Explain.
    12·1 answer
  • Jim found the quotient of two intergers and got a posotive interger. He added another interger to the quotient and got a posotiv
    5·1 answer
  • What is -3 over 10 plus -1 7 over 10? i need it quick so please let me know!!
    15·1 answer
  • the fabric costs $14.00 per yard if you buy 5or more yards, you can get20% off how much would 5 yards cost on sale
    15·1 answer
  • There were 532 people at the Nutcracker. If admission was $24 for adults and $16 for children and $10,272 was collected, how man
    10·1 answer
  • You can work no more than 60 hours each week at your two jobs. Dog walking pays $7 per hour and your sales job at Computers &amp
    5·2 answers
  • A set of history exam scores are normally distributed with a mean of 83.2 points and a standard deviation
    12·1 answer
  • 4x+5&gt;49<br> what is the answer to this
    8·2 answers
  • 5l 250ml ratio<br><br><br><br> ........................
    10·1 answer
  • Jamar has a points card for a movie theater.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!