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
OLEGan [10]
3 years ago
7

Mary is five times as old as Fred. In three years Mary will be 4 times as old as Fred. Find their present ages?

Mathematics
1 answer:
igomit [66]3 years ago
5 0

ans

here let mary age be x and fred be y

1st equation

x= 5y

2nd equation

x+3 =4(y+3)

now from 1st equation putting value of x in equation 2

x+3 = 4y+12

5y+3 = 4y +12

y = 9

so fred is 9 and mary is 45

You might be interested in
At a school fundraiser, for every 12 boxes of chocalate sold a
meriva

Answer/Step-by-step explanation:

72/12=6

6x5=30

30 points.

5 0
2 years ago
How can you indentify the opposite and the absolute value of a rational number?
defon
View the absolute value of a number as its distance from zero. When you take the absolute value of a number, you always end up with a positive number (or zero). Whether the input was positive or negative (or zero), the output is always positive (or zero).

Hope it helped
5 0
3 years ago
Sarah estimated that 230 people will attend the concert but 300 people attended. What was the percent change? Round to the neare
Pachacha [2.7K]
300/230=1.3043 approx. That’s an increase of 30.4%.
6 0
4 years ago
Summy is working in geometry class and is given figure abcd in the coordinate plane to reflect the coordinates of point d are a
fgiga [73]

Answer:

Answer is B

Step-by-step explanation:

If point D with coordinates (a,b) is reflected over the line y=x then the image point D' coordinates are (b,a) (see picture for details). 

The middlepoint M of segment DD' lhas coordinates  and lies on the line y=x (since its coordinates are equal), DD' is perpendicular to the line y=x and DM=D'M. All these remarks show that the point D' is the image point of D.

8 0
3 years ago
C(1)=6<br> c(n)=c(n-1)-16<br> Find the 3rd term in the sequence
sveticcg [70]
C(1)=6
c(2)=c(2-1)-16=c(1)-16=6-16=-10
c(3)=c(3-1)-16=c(2)-16=-10-16=-26
8 0
4 years ago
Read 2 more answers
Other questions:
  • Help on types of triangles!
    8·2 answers
  • The lengthbof the square is x the border surrounding the photo is 3 inches on each side and 4 inches on both top and bottom. Whi
    10·1 answer
  • If you took a bigger handful of tiles would you have a better chance of having a higher value
    7·2 answers
  • 3 less than g is less than or equal to 17.​
    12·1 answer
  • Is the line for the equation y = −8 horizontal or vertical? What is the slope of this line? Select the best answer.
    6·1 answer
  • Answer, please, hurry! :(
    10·2 answers
  • What is the length of the side opposite D?
    7·1 answer
  • The period of the decimal in 0.457 with a bar over is?<br>​
    8·1 answer
  • Which expression is equivalent to the expression shown?
    9·2 answers
  • Factor the expression.<br><br> 4x + 4
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!