MATHEMATICS MIDDLE SCHOOL

At the market, 555 light bulbs cost \$9$9dollar sign, 9.
How much do 777 light bulbs cost?

Answers

Answer 1

Answer:

Question:

At the market, 5 light bulbs cost $9. How much do 7 light bulbs cost?

Answer:

Cost of 7 bulbs is $ 12.6

Solution:

Given that,

5 light bulbs cost $ 9

Find the cost of 1 bulb

Cost of 1 bulb is found by dividing the cost of 5 bulbs by 5

$cost\ of\ 1\ bulb = \frac{\text{cost of 5 bulbs}}{5}\n\ncost\ of\ 1\ bulb = (9)/(5)\n\ncost\ of\ 1\ bulb = 1.8$

Thus cost of 1 bulb is $ 1.8

Find the cost of 7 bulbs:

$cost\ of\ 7\ bulbs = 7 * \text{cost of 1 bulb }\n\ncost\ of\ 7\ bulbs = 7 * 1.8\n\ncost\ of\ 7\ bulbs = 12.6$

Thus cost of 7 bulbs is $ 12.6

Answer 2

Answer:

Answer:

7 bulbs equals 12.6

Step-by-step explanation:

Related Questions

Felipe is planning a party. He has $50.00 to spend on sandwiches that cost $2.50 per person, $25.00 to spend on drinks that cost $1.50 per person, and $25.00 to spend on gift bags that cost $3.00 per person. Which expression could be used to show the amount of money he will have left over if x people attend the party.a.50+7xb.100-7xc.250x+1.50x+3.00xd.100-(2.50x-1.50x-3.00x)
I need to figure out the answer
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if a new CD player in North Carolina cost $225 and the sales tax is 4.75%, how much will a customer save during a tax-free holiday, when tax does not need to be paid?

Answers

In this question , there are several information's that has been provided and are of immense importance. Cost of a new CD player in North Carolina cost $225. The sales tax applied is 4.75%. The amount of savings during tax free period has to be calculated.
Then
The amount of money that the customer will
save during tax free period = 225 * (4.75/100)
= 225 * 0.0475
= 10.687
So the person will save $10.687 or you can take it as $10.69 during the tax free period.

Forgive me if I'm doing this wrong but, 225 times .0475 = 10.68. The tax is 10.69. So, when tax doesn't need to be paid the customer saves $10.69.

What is the value of x, when -9(x-5)=x+22 1/2

Answers

Answer:

$\large\boxed{x=(9)/(4)=2(1)/(4)}$

Step-by-step explanation:

$-9(x-5)=x+22(1)/(2)\qquad\text{multiply both sides by 2}\n\n(2)(-9)(x-5)=2x+(2)\left(22(1)/(2)\right)\n\n-18(x-5)=2x+45\qquad\text{use the distributive property:}\ a(b+c)=ab+ac\n\n(-18)(x)+(-18)(-5)=2x+45\n\n-18x+90=2x+45\qquad\text{subtract 90 from both sides}\n\n-18x+90-90=2x+45-90\n\n-18x=2x-45\qquad\text{subtract}\ 2x\ \text{from both sides}\n\n-18x-2x=2x-2x-45\n\n-20x=-45\qquad\text{divide both sides by (-20)}\n\n(-20x)/(-20)=(-45)/(-20)\n\nx=(45:5)/(20:5)\n\nx=(9)/(4)\to x=2(1)/(4)$

Answer:

x = 2.25

Step-by-step explanation:

-9(x - 5) = x + 22 1/2

Distribute the nine and then add 9x to both sides

-9x + 45 = x +22 1/2

+ 9x + 9x

Then try to get x alone

45 = 10x + 22 1/2

-22 1/2 -22 1/2

22.5 = 10x

$(22.5)/(10) = (10x)/(10)$

2.25 = x

98 * 75 * 54 *46 in scientific notation and word form

Answers

The answer is 18,257,400

scientific notation its 1.82574 * 10 to the 7th power

in word form its 18 million 257 thousand 400

18,257,400
1.8257400 x 10^7
eighteen million two hundred fifty seven thousand four hundred

sarah uses a recipe to make 2 gallons of her favorite mixed-berry juice. the containers she plans to use to store the juice have a capacity of 1 pint. how many containers will sarah need ?

Answers

1 gallon = 8 pints, so 2 gallons = 16 pints.
If each container can hold one pint, then she will need 16 containers.

so
1 gallon = 4 quarts
1 quart = 2 pints

g = 4q = q + q + q + q
g = 2p^+2p^+2p^+2p^
1 gallon equals 8 pints
2 gallons equal 16 pints

THe answer is 16 pints

Emily wants to have her Photo album printed. The printing company charges $24.50for the first book, and then a flat rate for each additional book. Emily pays $48.50 for 4
books. How much is the flat rate after the first book is purchased?

Answers

Answer: $8 flat rate

Step-by-step explanation: First subtract 24.50 from 48.50 to find the amount that was charged for the 3 additional books.

48.50 - 24.50 = 24

So the remaining 3 books costed a total of $24

Next, we need to divide 24 by 3 to determine how much each additional book costs.

24/3 = 8

So, the flat rate after the first book is purchased is $8 per additional book.

At the begining of 6 grade the ratio of number of the advanced math students to the number of regular students was 3:8. However after taking the placement tests students were moved around changing the ratio of the number of advanced msth students to the number of regulsr math students to 4:7. How many students started in regular math and advanced math if there were 92 students in advanced math after placement?