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ASHA 777 [7]
3 years ago
5

Hello.

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
7 0

answer:

she sends about 14 messages a day

step-by-step explanation:

using x as the total amount of texts your sister sends in a day

12 + x = 26

or

x = 26 - 12

all we really need to do now is solve the equation, ill be using the second one to help me explain this better!

x = 26 - 12

now word problems can get a little tricky sometimes but all we need to do is subtract to find out our answer

26 - 12

= 14  

x = 14 messages

and if you wanted to double check your answer, then you will using the first equation that we made!

12 + 14 = 26

true

( dont forget to replace the x for your answer 16 )

i hope this helps you! and if you need anymore help or if you need me to explain this better then feel free to comment! :)

Phantasy [73]3 years ago
4 0
You send 14 26-12=14
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How are numerical expressions and algebraic expressions different
lozanna [386]
Numerical expressions use numbers and algebraic expressions use variables.
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3 years ago
The amount of $180.00 is what percent greater than $135.00
olga nikolaevna [1]
Percent change = ((new value) - (old value))/(old value) × 100%
  = (180 -135)/135 × 100%
  = 33 1/3%

180 is about 33% greater than 135.
8 0
3 years ago
What is the measure of angle 1?
Goryan [66]
The measure of angle 1 is 75°. Hope you get it.
3 0
3 years ago
Read 2 more answers
Sample annual salaries (in thousands of dollars) for employees at a company are listed. 42 36 48 51 39 39 42 36 48 33 39 42 45 (
Sonja [21]

Answer:

a) Data given: 42 36 48 51 39 39 42 36 48 33 39 42 45

\bar X = 41.538

s = 5.317

b) 44.1, 37.8, 50.4, 53.55, 40.95, 44.1, 37.8, 50.4 ,34.65, 40.95, 44.1, 47.25

\bar X = 43.615

s= 5.583

c) 3.5, 3, 4, 4.25, 3.25, 3.25, 3.5, 3, 4, 2.75, 3.25, 3.5, 3.75

\bar X= 3.462

s = 0.443

d) As we can see, the average of part b is 1.05 times the average of part a (1.05 * 41.538 = 43.615) and the average of part c is equal to the average obtained in part a divided by 12 (41.538 / 12 = 3.462).

And that happens because we create linear transformations for the parts b and c and the linear transformation affects the mean.

And you have the same interpretation for the deviation, it is affected by the linear transformation as the mean.

Step-by-step explanation:

For this case we can use the following formulas for the mean and standard deviation:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

s = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

Part a

Data given: 42 36 48 51 39 39 42 36 48 33 39 42 45

And if we calculate the mean we got:

\bar X = 41.538

s = 5.317

Part b

For this case we know that each value present a 5% of rise so we just need to multiply each value bu 1.05 and we have this new dataset:

44.1, 37.8, 50.4, 53.55, 40.95, 44.1, 37.8, 50.4 ,34.65, 40.95, 44.1, 47.25

And if we calculate the new mean and deviation we got:

\bar X = 43.615

s= 5.583

Part c

The new dataset would be each value divided by 12 so we have:

3.5, 3, 4, 4.25, 3.25, 3.25, 3.5, 3, 4, 2.75, 3.25, 3.5, 3.75

And the new mean and deviation would be:

\bar X= 3.462

s = 0.443

Part d

As we can see, the average of part b is 1.05 times the average of part a (1.05 * 41.538 = 43.615) and the average of part c is equal to the average obtained in part a divided by 12 (41.538 / 12 = 3,462).

And that happens because we create linear transformations for the parts b and c and the linear transformation affects the mean.

And you have the same interpretation for the deviation, it is affected by the linear transformation as the mean.

5 0
3 years ago
Y-1.6=8.76 what is y
Verizon [17]

Answer:

y = 10.36

Step-by-step explanation:

y - 1.6 = 8.76

add 1.6 to both sides

y - 1.6 + 1.6 = 8.76 + 1.6

y = 10.36

8 0
2 years ago
Read 2 more answers
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