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
tatuchka [14]
3 years ago
14

Matt say he can find the sum of 45+50 without rewriting it explain how you can solve using mental math

Mathematics
2 answers:
Ganezh [65]3 years ago
6 0
It's 95 because 5 plus 4 is 9 and 50 plus 45 is 95
zysi [14]3 years ago
6 0
It is actually easier than it looks because one of the numbers ends in a 0 which make so your really just adding one number.


Here is the thought process; ok so 5 + 0 = 5 so the last number will be 5 and 4+5= 9 which will be the first number so 9 and 5 put together = 95


I hope this help you.
You might be interested in
Use the following problem to answer questions 7 and 8. Carrie draws 5 cards simultaneously from a well-shuffled deck of 52 playi
Alexxx [7]

Answer:

The probability that she chooses 3 spades and 2 cards that are not spades is

0.08154

Step-by-step explanation:

52 deck cards have 13 spades , 13 clubs , 13 diamond, 13 hearts

spades = 13

Non spades = 39

Selecting 3 spades = 13C3 (Using combination)

selecting 2 spades = 39C2

in total 5 cards are drawn = 52C5

Probability of drawing 5 cards (3spades+2 non spades)

                               =\frac{ 13C3*39C2}{52C5} = 0.08154

8 0
3 years ago
Find a 75% confidence interval for the population average weight μ of all adult mountain lions in the specified region. (Round y
kupik [55]

Answer:

75% confidence interval is 91.8±16.66. That is between 75.1 and 108.5 pounds.

Step-by-step explanation:

The question is missing. It is as follows:

Adult wild mountain lions (18 months or older) captured and released for the first time in the San Andres Mountains had the following weights (pounds): 69  104  125  129  60  64

Assume that the population of x values has an approximately normal distribution.

Find a 75% confidence interval for the population average weight μ of all adult mountain lions in the specified region. (Round your answers to one decimal place.)

75% Confidence Interval can be calculated using M±ME where

  • M is the sample mean weight of the wild mountain lions (\frac{69 +104 +125 +129+60 +64}{6} =91.8)
  • ME is the margin of error of the mean

And margin of error (ME) of the mean can be calculated using the formula

ME=\frac{t*s}{\sqrt{N} } where

  • t is the corresponding statistic in the 75% confidence level and 5 degrees of freedom (1.30)
  • s is the standard deviation of the sample(31.4)
  • N is the sample size (6)

Thus, ME=\frac{1.30*31.4}{\sqrt{6} } ≈16.66

Then 75% confidence interval is 91.8±16.66. That is between 75.1 and 108.5

3 0
3 years ago
Jenny has 63 grapes to put in a fruit salad but she only wants to add 40% of them to the Bowl how many grapes does she use for t
crimeas [40]
You multiply 63  by .40
You get 25.2, so 25 grapes
7 0
3 years ago
Read 2 more answers
What is the simplified form of the following expression? Assume x greater-than-or-equal-to 0 and y greater-than-or-equal-to 0 2
FromTheMoon [43]

Answer:

This is your answer

7 0
3 years ago
Read 2 more answers
Help me plz need smart people
Genrish500 [490]
The answer to 9 is 87.

The answer to 10 is x=91, y=89, and z=31

Mark as branliest plz

8 0
3 years ago
Read 2 more answers
Other questions:
  • Heidy is standing on a 40-foot cliff overlooking a river. The angle of depression to the near side of the river is 64°, and the
    12·2 answers
  • Hello!! I need help with square root please help me!!!
    15·2 answers
  • What is the function notation for 3g(3)
    10·1 answer
  • What is -3 (4n+2)=3<br>N=
    6·2 answers
  • 1.2 x 10^-1 in decimal form
    6·1 answer
  • Pls someone help i will put brainlyist
    13·1 answer
  • Tony Stark had 484 Iron Man suits. He wanted to divide them into groups of 22. How many groups of Iron Man suits were there?
    8·1 answer
  • A bike costs $350. It is on sale for 35% off.<br><br> What is the sale price of the bike?
    14·2 answers
  • SHOW YOUR WORK
    12·2 answers
  • Find the area of the figure. HELP PLZ
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!