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
Find the range of allowable values based on an expected mass of 250 grams for which values are allowed to vary by 5%
PIT_PIT [208]

Answer:

woooooooooooooooooooooo

Step-by-step explanation:

wooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

4 0
2 years ago
FIND A NUMBER WITH SIX FACTORS, ALL OF WHICH ARE ODD NUMBER
Bas_tet [7]

Answer: 99

Step-by-step explanation:

factor of 99: 1, 3, 9, 11, 33, 99

This is 6 factors, and they are all odd number

Hope this helps!! :)

Please let me know if you have any question

6 0
2 years ago
What is the midpoint between (7 − 3i) and ( 3 + 2i).
Rufina [12.5K]

Answer:Answer: 5 - i/2

Step-by-step explanation:

Complex numbers on the complex plane are in essense the same, when it comes to midpoints. Applying the midpoint formula, we get the midpoint as  ( 3+2i + 7-3i ) /2 , or (10-i)/2, or 5- i/2

5 0
3 years ago
What is the area of a sector with a central angle of (2pi/3) radians and a diameter of 12 in?
Stels [109]

Answer:

The area of the sector is 37.68\ in^{2}

Step-by-step explanation:

step 1

Find the area of the circle

The area of the circle is equal to

A=\pi r^{2}

we have

r=12/2=6\ in ----> the radius is half the diameter

substitute

A=(3.14)(6)^{2}

A=113.04\ in^{2}

step 2

Find the area of a sector with a central angle of (2pi/3)

Remember that

The area of 113.04\ in^{2} subtends a central angle of 2\pi \ radians

so

by proportion

Let

x----> the area of the sector

\frac{2\pi}{113.04}=\frac{(2\pi/3)}{x}\\ \\x=113.04*(2\pi/3)/(2\pi)\\ \\x=37.68\ in^{2}

8 0
3 years ago
Sal is tiling his entryway. The floor plan
loris [4]

what is the question really

3 0
3 years ago
Other questions:
  • Jesse owns a sporting goods store that sells skis and snowboards. The store earns a profit of $52 for each ski sold and a profit
    10·1 answer
  • What is the coefficient of the second term of the trinomial? (4a+5)2=16a2+Ba+25 Enter your answer in the box. B =
    12·1 answer
  • 2.3 2 4/5 and 2.6 in least to greatest
    13·1 answer
  • Solve for w.<br> a=2w<br><br> how do i begin the process for solving this problem?
    11·1 answer
  • Can u give an explanation for the answer
    6·1 answer
  • Which of the following circles have their centers in the x-axis check all that apply
    9·1 answer
  • Estimate 0.56% of 72. (​
    15·2 answers
  • &lt;1 and &lt;2 are supplementary angles. The measure of &lt;1 is 87º. The measure of &lt;2 is 15x + 18º.
    9·1 answer
  • Sandra waits tables at Polly's Tamales. While she is working, she receives a discount on any food she buys. If an item normally
    13·1 answer
  • Which statement about the data in the histogram is true?<br>​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!