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
vagabundo [1.1K]
3 years ago
12

the sum of the digits of a certain teo digit number is 11. reversing its digits decreases the number by 63. whats the number

Mathematics
1 answer:
qaws [65]3 years ago
8 0
Let x and y be the digits.

x + y = 11
y + x = - 63

Take it from here. We have a system of linear equations in two variables.
You might be interested in
Look at the formula for the area of a triangle. a = 1 2 bh which is a solution for h?
andrey2020 [161]
Answer: h = 2a/b


Explanation:

a =  \cfrac{1}{2} bh

2a = bh

bh = 2a

h =  \cfrac{2a}{b}
7 0
3 years ago
Use the number line to determine the unknown addend in the given number sentence.
Gnesinka [82]

Answer:

C

Step-by-step explanation:

-4+(-5)=-9

-4=-9+5

-4=-4......correct

5 0
3 years ago
Read 2 more answers
Data Set: 13, 1, 18, 20, 18<br> • Mean =<br> Median =<br> • Mode =<br> • Range -<br> • Outlier -
KengaRu [80]

Answer:

mean=14

median=3

mode=20

range=19

8 0
3 years ago
Read 2 more answers
Find the length of the missing side. 1. a = 16, b = 63 2. b = 2.1, c = 2.9
gayaneshka [121]
This problems needs an image!!
4 0
3 years ago
A survey among freshman at a certain university revealed that the number of hours spent studying before final exams was normally
patriot [66]

Answer: 0.0775

Step-by-step explanation:

Given : Mean : \mu = 25

Standard deviation : \sigma =15

Sample size : n=36

Since its normal distribution , then the formula to calculate the z-score is given by :-

z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}

For x= 28.2 hours

z=\dfrac{28.2-25}{\dfrac{15}{\sqrt{36}}}=1.28

For x= 30 hours

z=\dfrac{30-25}{\dfrac{15}{\sqrt{36}}}=2

The P- value = P(1.28

=P(z

Hence, the probabiliy that the average time spent stydying for the sampe was between 28.2 and 30 hours = 0.0775

6 0
3 years ago
Other questions:
  • Need the answer asapp with the working out please thanks :)
    9·1 answer
  • What is the value of x for the point with a y-value of 6?
    14·2 answers
  • Simplify 5.142857142857143
    14·2 answers
  • In ΔVWX, the measure of ∠X=90°, XW = 36, WV = 85, and VX = 77. What ratio represents the sine of ∠W?
    12·1 answer
  • During an experiment, some water was removed from each of the 6 water tanks. If the standard deviation of the volumes of water i
    13·1 answer
  • Hiiiiii peoples<br><br> Solve the inequality 6x^2-x&lt;2 please show all steps
    13·1 answer
  • I really need help! ASAP<br> Someone please!<br><br> Solve for x.<br> Look at the picture below.
    15·1 answer
  • Henry went to an amusement park with $150.00 and spent all of it. He spent 1/5 of the money on parking He spent $37.00 on admiss
    8·1 answer
  • Suppose that 45% of all babies in a particluar hospital are boys. If 8 babies born in the hospital are randomly selected, what i
    15·1 answer
  • Use the Law of Sines to find the missing angle of the triangle.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!