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
iogann1982 [59]
2 years ago
8

The square root of Eva’s age is two more than the square root of Jamil’s age If Jamil is 9 years old, how old is Eva?

Mathematics
1 answer:
AysviL [449]2 years ago
5 0

14

Step-by-step explanation:

Her brother is 9 and she is 14.

say she is 14, 14+2=16 a perfect square.

14-10=4 which is the square root of 16.

So she is 14 and her brother is 9.

(He is a perfect square too, by the way.)

You might be interested in
Antonio drops a glass marble into a pond and creates ripples that form concentric circles on the surface of the water. The radiu
photoshop1234 [79]

Answer:

is it multiple answer?

Step-by-step explanation:

8 0
3 years ago
Which expression is a rational number? A) ( 25 + 25 )2 B) ( 25 + 50 )2 C) ( 50 + 75 )2 D) ( 25 + 72 )2
tigry1 [53]
I believe it's a hope it helps
6 0
3 years ago
Find the area of the triangle <br> 19cm<br> 15cm<br> 12cm
777dan777 [17]

Answer:

Step-by-step explanation:

4 0
2 years ago
Daily high temperatures in St. Louis for the last week were as​ follows: 95​, 92​, 93​, 92​, 95​, 90​, 90 ​(yesterday). ​a) The
hichkok12 [17]

Answer:

a) T = 91.7 degrees

b) T = 90 degrees

c) MAD = 1.9

d) MSE = 5.05

Step-by-step explanation:

Given:

- Daily high temperatures in St. Louis for the last week were as​ follows:

                                   95​, 92​, 93​, 92​, 95​, 90​, 90

Find:

a) Forecast the high temperature today, using a 3-day moving average.

b) Forecast the high temperature today, using a 2-day moving average.

c) Calculate the mean absolute deviation based on a 2-day moving average, covering all days in which you can have a forecast and an actual temperature.

d) The mean squared error for the​ 2-day moving average​

Solution:

a)

- The set of 3 day moving average is as follows:

4.   (95 + 92 + 93) ÷ 3 = 93.33⁰C

5.  (92 + 93 + 92) ÷ 3 = 92.33⁰C

6.  (93 + 92 + 95) ÷ 3 = 93.33⁰C

7.  (92 + 95 + 90) ÷ 3 = 92.33⁰C

8.  (95 + 90 + 90) ÷ 3 = 91.667⁰C

- Now use these points on excel sheet to forecast the temperature for today. The line of best fit is given:

T = 91.7 degrees

b)

- The set of 2 day moving average is as follows:

3.   (95 + 92) ÷ 2 = 93.5⁰C

4.  (95 + 93) ÷ 2 = 92.5⁰C

5.  (93 + 92) ÷ 2 = 92.5⁰C

6.  (92 + 95) ÷ 2 = 93.5⁰C

7.  (95 + 90) ÷ 2 = 92.5⁰C

8. (90 + 90) ÷ 2 = 90⁰C

- Now use these points on excel sheet to forecast the temperature for today. The line of best fit is given:

T = 90 degrees

c)

                             Error             Error^2

3.   93.5⁰C            0.5                  0.25

4.   92.5⁰C            0.5                  0.25

5.   92.5⁰C            2.5                  6.25

6.   93.5⁰C            3.5                  12.25

7.   92.5⁰C            2.5                  6.25

8.   90⁰C

- The mean absolute deviation as follows:

                              MAD = Sum of all errors  / 5

                              MAD = (0.5+0.5+2.5+3.5+2.5)  / 5

                              MAD = 1.9

d)

- The mean squared error deviation as follows:

                              MSE = Sum of all error^2  / 5

                              MSE = (0.25+0.25+6.25+12.25+6.25)  / 5

                              MSE = 5.05

4 0
3 years ago
Solve 3x+2y=7 and x-4y=-21 by using any method
kupik [55]

Answer:

(- 1, 5 )

Step-by-step explanation:

Using the method of substitution.

Given the 2 equations

3x + 2y = 7 → (1)

x - 4y = - 21 → (2)

Rearrange (2) expressing x in terms of y by adding 4y to both sides.

x = 4y - 21 → (3)

Substitute x = 4y - 21 into (1)

3(4y - 21) + 2y = 7 ← distribute and simplify left side

12y - 63 + 2y = 7

14y - 63 = 7 ( add 63 to both sides )

14y = 70 ( divide both sides by 14 )

y = 5

Substitute y = 5 into (3)

x = (4 × 5) - 21 = 20 - 21 = - 1

Solution is (- 1, 5 )

8 0
3 years ago
Other questions:
  • 3x + 7y = 21 solve for y
    9·1 answer
  • Over the course of a year, a company goes from 115 employees to 124 employees. Use the drop-down menus to build an equation that
    5·1 answer
  • Sue graphed the formula for converting temperatures from Fahrenheit to Celsius.
    8·1 answer
  • Fitness Classes cost £6 per person. The table shows the number of people who go to the classes on Thursday, Friday and Saturday.
    8·1 answer
  • <img src="https://tex.z-dn.net/?f=f%286%29%3Dx%5E%7B2%7D%20%2B3x-%5Cfrac%7Bx%7D%7B2%7D" id="TexFormula1" title="f(6)=x^{2} +3x-\
    12·2 answers
  • Please try your best, but with explanation! Use the screenshot provided!
    6·2 answers
  • Whats is the answer x-6 = -5?
    8·2 answers
  • Miss Clark form has chickens and pigs there are a total of 26 animal feet and a animal head on her form is 20 feet belongs to th
    9·1 answer
  • The expression 27.50+ 0.11x models the monthly cost in dollars of a phone plan. In the
    5·1 answer
  • Pls help. I'll mark you as brainliest.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!