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
ruslelena [56]
3 years ago
6

Sara has a son and a daughter – Billy and Jane. Billy is five times as old as Jane. Their mother is now three times as old as Bi

lly, and in 2 years she will be eight times as old as Jane. Find the present age of the mother.
Please solve and show ur work. If u do, I will make u brainliest (if u r correct)

PLEASE HELP
Mathematics
1 answer:
sleet_krkn [62]3 years ago
8 0

Answer:

30 years old.

Step-by-step explanation:

Here's what we know.

B=5J

M+2=8J+16

M=3B

So now let's solve using substitution.

M+2=8J+16

M=8J+14

But we know that M=3B

3B=8J+14

And we know B=5J

3*5J=8J+14

15J=8J+14

7J=14

J=2

Now, we can plug it into the M+2=8J+16

M+2=2*8 +16

M+2=16+16

M+2=32

M=30

Hope you enjoyed.

You might be interested in
Marcus spent 10 hours doing his homework last week.This week he spent 11 hours doing his homework.He says that he spent 110% mor
KonstantinChe [14]
We know that Marcus spent 10 hours on his homework this week so:
10 hours = 100%

Marcus is saying that he spent 110% more time doing his homework this week, in comparison to last week.

Then to see if he is correct we have to find 110% of 10 hours.

So if: 100% of 10 hours = 10 hours
And: 10% of 10 hours (equivalent to 600 minutes) = 1 hour (or 60 minutes)
Then we add the two: 10 hours + 1 hour
And we get: 11 hours

As a result, Marcus is correct; he did spend 110% more time on his homework this week.

Hope this helps! :D
4 0
3 years ago
Consider the graph shown.<br> the<br> Which function could this graph represent?
Sever21 [200]
There is no graph. you need to attach a picture, you can’t get your questions answered like that
4 0
3 years ago
Read 2 more answers
What's the 7th term in the geometric sequence
Marta_Voda [28]
a_{7} = 2 \times 5^{7 -1} = 2 \times 5^{6} = 2 \times 15,625 = 31,250
4 0
3 years ago
The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has under
Ann [662]

Answer:

t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50    

Step-by-step explanation:

Data given and notation  

\bar X=1.20 represent the sample mean given

\sigma = 0.14 represent the population standard deviation

n=49 sample size  

\mu_o =1.25 represent the value that we want to test

t would represent the statistic (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean for the gasoline prices is lower than 1.25, the system of hypothesis would be:  

Null hypothesis:\mu \geq 1.25  

Alternative hypothesis:\mu < 1.25  

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50    

5 0
3 years ago
A merchant sold a pen for $6.90 ,thereby making a profit of 15% on her cost calculate the cost of the pen to the merchant to the
NeTakaya
So you know the merchant made a 15% profit on the pen, so she bought it for a cheaper price. To find the cost of the pen before you have to take the price now, $6.90 and times it by 85%. You do 85% because you subtract the 15% she saved from 100% and you get 85%. So 6.90x.85= 5.865 which rounds to $5.87
7 0
3 years ago
Other questions:
  • If you have 5 distinct positive integers and the median is 17 and the mean is 12, what are the 5 numbers? How do you know for su
    13·1 answer
  • . The value of a lottery prize doubles
    11·1 answer
  • One more math question for the night. please show work :0
    7·2 answers
  • Vbnmg bar bgfb gb ghtb gab bingo gb gn
    15·2 answers
  • What is the volume of the cylinder?
    14·1 answer
  • Continue the pattern: 3-6,12,4,20​
    11·2 answers
  • HELPPPPPP HELPPP!!!!!!!! ASAPPPP PLS AHHHHHHH
    11·1 answer
  • -The concrete sections of a highway are designed to be 25 m long. Sections are prepared at 10°C. What is the minimum space that
    9·2 answers
  • The mean SAT score in mathematics is 554. The standard deviation of these scores is 39. A special preparation course claims that
    12·1 answer
  • which assumption of ols assumes that there is no correlation between the error and the independent variables
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!