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Dennis_Churaev [7]
3 years ago
9

Pls answer 9-12 will give brainliest

Mathematics
1 answer:
Elanso [62]3 years ago
6 0
9. $112.50 / 9 lawns = $12.50 per lawn
10. $122.50 / 7 lawns = $17.50 per lawn
11. $112.50 / 7.5 hours = $15.00 per hour
$122.50 / 5 hours = $24.50 per hour
Alastair earns more per hour
12. Taryn: 49 more hours ($735 / $15.00)
Alastaie: 30 more hours ($735 / $24.50)
You found how much money they charge per hour in 11 so use that to find how many hours it takes to earn $735.
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Betty is having invitations printed for a holiday party. It costs $3.70 to set up the printing machine and $1.55 per invitation.
PIT_PIT [208]
Y = 1.55x + 3.70
1.55 x 150 = 232.5
232.5 + 3.70 = 236.2

The answer is C 236.20 hope that helped.
4 0
3 years ago
Mary has a discount coupon of 8% at a grocery store. She buys items worth $108 from the store. How much does Mary need to pay af
o-na [289]

Answer: Mary needs to pay  $99.36  after using the discount coupon.

Step-by-step explanation:

Find 8% of the total items price and subtracted it from the original price to find the amount she needs to pay after the discount.

8% of 108 = 8.64

108 - 8.64 = 99.36

So $99.36 will be left to pay after using the coupon.

8 0
3 years ago
A.Find a formula for
Vlada [557]

a. Notice that

1/(1*2) = 1/2 = 1 - 1/2

1/(2*3) = 1/6 = 1/2 - 1/3

1/(3*4) = 1/12 = 1/3 - 1/4

and so on, which suggests the n-th term of the sum can be written as

\dfrac1{n(n+1)}=\dfrac1n-\dfrac1{n+1}

Then the sum itself is telescoping:

\dfrac1{1\cdot2}+\dfrac1{2\cdot3}+\dfrac1{3\cdot4}+\cdots+\dfrac1{n(n+1)}

=\left(1-\dfrac12\right)+\left(\dfrac12-\dfrac13\right)+\left(\dfrac13-\dfrac14\right)+\cdots+\left(\dfrac1n-\dfrac1{n+1}\right)

=1-\dfrac1{n+1}

b. The proof is trivial:

\dfrac1n-\dfrac1{n+1}=\dfrac{n+1}{n(n+1)}-\dfrac n{n(n+1)}=\dfrac{n+1-n}{n(n+1)}=\dfrac n{n+1}

so the formula found in (a) is correct.

5 0
3 years ago
There are 25 students in Ms. Nguyen's second-grade class. In the class election, 4 students voted for Benjamin, 12 voted for Sah
snow_lady [41]

percentage 9/25  * 4/4 = 36/100

36%

Answer: 36 percent

5 0
3 years ago
Betty had $40 in her pocket. She bought 12 identical bags of popcorn.
Gre4nikov [31]

Each bag of popcorn cost $2.50

$40-$10=30

$30/12=2.5

4 0
3 years ago
Read 2 more answers
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