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
Alisiya [41]
3 years ago
6

Mary is 3 years older than Sarah.winifred is twice as old as Mary. Altogether thei ages total 89. How old is Sarah

Mathematics
1 answer:
maria [59]3 years ago
7 0

Answer:

sarah is 20 years old

Step-by-step explanation:

We will represent Mary as m, Sarah as s and wilfred as W

so m= s+3, w= 2m

and s + w + m = 89

substitute m for s+3

so

w=2s + 6 and

2s+3+w=89

substitute w for 2s+6

2s + 3 +2s+6=89

4s+9=89

4s= 80

s=20

You might be interested in
Explain where Earth is found in the universe.
Aliun [14]

Answer:

Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun.

Step-by-step explanation:

3 0
3 years ago
The function g(x) is graphed on the coordinate grid.
blagie [28]

Answer:

The first one

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Solve the following system of equations. Enter the y-coordinate of the solution. Round your answer to the nearest tenth.
Alex17521 [72]
-2x + 6y = -34
-x + 3y = -17
x = 3y +17

Sub this into 1st eqn
5(3y + 17) + 2y = 21
15y + 85 + 2y =21
17y = -64
y = -3.7647 (to 5 sig. fig.)
y = -3.8 (to nearest tenth)

Sub y = -3.7647 into 2nd eqn
x = 3(-3.7647) +17
x = 5.7 (to nearest tenth)
7 0
3 years ago
To prepare for a bake-off, Clarissa used 560 grams of flour each day for 3 weeks. How many kilograms did Clarissa use in those 3
Sindrei [870]
Convert G to kg
560/1000=.56 kg a day

If the bake off was 5 days
.56*5= 2.8kg... per week
2.8kg*3= 8.4 kg for 3 weeks

If it was 7 days
.56*7 = 3.92 kg per week
3.92*3= 11.76 kg for 3 weeks
5 0
3 years ago
What is 2 ×86 dived by 297 thousandths
Tom [10]
Dont quote me on this but i think it is 10 because 86 × 2 is 172 and 297 ÷ 172 is 10 I think
3 0
2 years ago
Other questions:
  • points P and Q lie 240 m apart in line with and on opposite sides of a communications tower. the angles of elevation to the top
    15·1 answer
  • 12 + 2x - x = 9x + 6 <br><br><br> I need help!!
    7·1 answer
  • How much would $500 invested at 5% interest compounded continuously be
    9·1 answer
  • X-4/10=7/5<br> Plz solve these
    10·2 answers
  • Combine like terms to simplify the expression:<br> 3x + 5 + 4x − 2 + 7x
    14·2 answers
  • The caldwells are moving across the country. Mr Caldwell leaves 3 hours before Mrs Caldwell. If he averages 45 mph and she avera
    12·1 answer
  • Name an outcome that has a probability of 0.5​
    12·1 answer
  • What is the answer to 2.5 divided by 5
    10·1 answer
  • During a checkers game, there are 16 pieces left. The ratio of black to red is 3 : 5. How many black pieces are on the board? Ex
    12·1 answer
  • A quadrilateral has angles that measure 115, 97, and 68. What is the measure of the missing angle?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!