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olga_2 [115]
3 years ago
11

Eunice wanted to save up for a mountain bike that costs £250. She baby-sits each week for 6 hours for £2.75 an hour, and does a

Saturday job that pays £27.50. She saves 3/4 of her weekly earnings. How many weeks will it take her to save enough to buy the bike?
Mathematics
1 answer:
choli [55]3 years ago
3 0

Answer:

Approximately 2 weeks

Step-by-step explanation:

Given data

Cost of bike=  £250

<em>Assuming she works for 6 days</em>

1.Babysitting

6*2.75=£16.5 per day

for 6 days

=16.5*6

=£99

2. Saturday Job

=£27.50

Total earnings for the week

=£27.50+£99

=£126.5 weekly

Hence it will take her

=250/126.5

=1.97 week

Approximately 2 weeks to save up the amount

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Solve h^2− 42 = −h using the quadratic formula.
aleksandr82 [10.1K]
Hi there! The answer is C. h = 6 or h = −7

{h}^{2} - 42 = - h
Add h to both sides of the equation.

h {}^{2} + h - 42 = 0
First we need to find the discriminant (which can be found using the formula D = b^2 - 4ac)

d = 1 {}^{2} - 4 \times 1 \times - 42 \\ d = 1 + 168 \\ d = 169

Now we can plug in our found values into the quadratic formula.

x = \frac{ - b - \sqrt{d} }{2a} \: \\ or \\ \: x = \frac{ - b + \sqrt{d} }{2a}

Plug in.
x = \frac{ - 1 - \sqrt{196} }{2 \times 1} = \frac{ - 1 - 13}{2} = \frac{ - 14}{2} = - 7 \\ or \\ x = \frac{ - 1 + \sqrt{196} }{2 \times 1} = \frac{ - 1 + 13}{2} = \frac{ 12}{2} = 6

Hence, the answer is C. h = 6 or h = −7
4 0
3 years ago
Read 2 more answers
What is 23×4+9-4÷6×1536=?
mart [117]

Use Bedmas for this question

Follow the order in which comes first left to right. For addition and subtraction, do whichever comes first. For division and multiplication do which ever comes first.

B=Bedmas

E=Exponents

D=Division

M=Multiplication

A=Addition

S=Subtraction

1.

23*4=92

4*6=4/6

4/6=2/3

2.

2/3*1536=2.512/1

3.

92+9=101

4.

-1024+101=-923

So the final answer is -923


Hope it helps :)


-923

8 0
4 years ago
Read 2 more answers
The school's Environmental Science Club has $500 of funds. Each time they go on a field trip, it costs
velikii [3]

Given:

Total fund = $500

cost of each trip = $80

To find:

The an algebraic expression that represents the money the club has after going on field  trips.

Solution:

Let x be the number of field trips.

Cost of 1 field trip = $80

Cost of x field trip = $80x

We have, Total fund = $500.

So, the money the club has after going on field  trips is

\text{Remaining money}=500-80x

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Original price $50 mark up 10% selling price?
Anna35 [415]

Answer:

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Step-by-step explanation:

$50 + 0.10($50) = 1.1 * 50 = $55

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3 years ago
Chardai reads 25% of a book each night that has 280 pages. How many pages will she read
enyata [817]

Answer:

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Step-by-step explanation:

Remember that in math, "of" usually means we multiply.

Here, Chardai reads 25% OF a 280-page book each night.

So, we multiply 25% by 280:

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The answer is 70 pages.

<em>~ an aesthetics lover</em>

6 0
3 years ago
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