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
Lina20 [59]
2 years ago
15

4. Mary has 21 coins whose total value is Kshs. 72. There are twice as many five

Mathematics
1 answer:
Stells [14]2 years ago
6 0

Answer:

Mary has  

3 10

shilling coins.

Step-by-step explanation:

You might be interested in
phil's age is 7 years more than 1/5 times peter's age.also,4 times phil's age is 2 years less than twice peter's age .if x is pe
bearhunter [10]
Let Peters age be x
Phil's age is 1/5x+7---------------------------(i)
Phil's age can also be calculated as 
4(1/5x+7)=2x-2--------------------------------(ii)
So,
4/5x+28=2x-2
28+2=2x-4/5x
30=10/5x-4/5x
30=6/5x
x=30*\frac{5}{6}
x=25
5 0
3 years ago
Read 2 more answers
Which residual plots indicate that the original data set has a linear relationship? Check all that apply
Amanda [17]

Answer: A, B and E

Step-by-step explanation:

A residual values should be equally and randomly spaced around the horizontal axis. If the plot looks like any of the images in C and D, then the data set is probably not a good fit for regression. A non-linear pattern is more appropriate.

4 0
3 years ago
Read 2 more answers
"Lashonda swam 4 kilometers against the current in the same amount of time it took her to swim 16 kilometers with the current. T
Naddika [18.5K]

Answer:

5 km/h

Step-by-step explanation:

In this problem, Lashonda swam 4 km against the current. So the distance covered in this case is

d_1=4 km

Calling v the velocity of Lahonda without the current, and c the velocity of the current, in this situation Lahonda's velocity is

v-c

So we can write:

t_1=\frac{d_1}{v-c}

where t_1 is the time taken to cover the distance.

When Lashonda swims with the current, her velocity is

v+c

So we can write

t_2=\frac{d_2}{v+c}

where

d_2=16 km is the distance covered in this case, and t_2 the time taken.

The velocity of the current is

c=3 km/h

Since Lashonad takes the same time to cover the two distances,

t_1=t_2

So we can write

\frac{d_1}{v-c}=\frac{d_2}{v+c}

And solving for v, we find Lashonda's velocity without the current:

d_1(v+c)=d_2(v-c)\\d_1 v+d_1c = d_2v-d_2c\\v(d_2-d_1)=c(d_1+d_2)\\v=\frac{d_2+d_2}{d_2-d_1}c=\frac{16+4}{16-4}(3)=5 km/h

7 0
3 years ago
Mary wants to fill in a cylinder vase. At the flower store they told her that the vase should be filled for the flowers to last
klasskru [66]
I hope this helps you

8 0
3 years ago
Tabitha earns $8.50 per hour at her summer job. She wants to save money to buy a tablet that costs $289 plus 6% sales tax. Tabit
Arturiano [62]

Answer:

The Inequality that shows number of hours Tabitha will need to work to have enough money to buy the tablet is 75+8.5x\geq 306.34.

Tabitha needs to work at least 28 hours to buy the tablet.

Step-by-step explanation:

Amount earn per hour = $8.50

Amount already saved = $75

Cost of tablet = $289

Sales tax = 6%

We to write and solve the inequality number of hours Tabitha will need to work to have enough money to buy the tablet.

Solution:

Let the number of hours she need to work be 'x'.

First we will find the total amount required to buy tablet.

Amount of sales tax = \frac{6}{100}\times289 = \$17.34

Now Total cost to buy tablet will be equal to sum of Cost of tablet and Amount of sales tax.

framing in equation form we get;

Total cost to buy tablet = 289+17.34 = \$306.34

Now we can say that;

Amount already saved plus Amount earn per hour multiplied by Amount earn per hour should be greater than or equal to Total cost to buy tablet.

framing in equation form we get;

75+8.5x\geq 306.34

hence The Inequality that shows number of hours Tabitha will need to work to have enough money to buy the tablet is 75+8.5x\geq 306.34.

On solving the above Inequality we get;

First we will subtract both side by 75 we get;

75+8.5x-75\geq 306.34-75\\\\8.5x\geq 231.34

Dividing both side by 8.5 we get;

\frac{8.5x}{8.5}\geq \frac{231.34}{8.5}\\\\x\geq 27.21

Hence Tabitha needs to work at least 28 hours to buy the tablet.

5 0
3 years ago
Other questions:
  • If john can drink one barrel of water in 6 days, and mary can drink one barrel of water in 12 days, how long would it take them
    13·1 answer
  • Change 6 1/8 into an improper fraction.
    9·2 answers
  • Tye bought a pizza for his friends for dinner. Tye ate 1/12 of the pizza. How much pizza is left?
    15·1 answer
  • What is the equation of the function that is graphed as line b?
    15·1 answer
  • Which expression is equivalent to One-fifth (150 x minus 80 y + 50 minus 50 x minus 25 y + 20)?
    15·2 answers
  • Jen and ted have cookies for snack time. Jen has 4 cookies. Ted has 1 less cookie than Jen. How many cookies does ted have
    15·2 answers
  • At 12:45 Jimmy left his home in Pinetrees and cycled to visit his grandmother in Oakville. On his
    7·1 answer
  • Steven and Julio each have 13 marbles. Megan has twice the number of marbles as Steven and Julio combined. Steven thinks that me
    14·1 answer
  • ASAP PLEASE ILL GIVE BRAINLIEST
    5·1 answer
  • Ages Number of students
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!