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2 years ago

(Blank) % of $10 = $9 (L.8 ixl seventh grade)

Mathematics

2 answers:

Rus_ich [418]2 years ago

7 0

Answer:

90% of $10 is $9.

Step-by-step explanation:

Let's say 'x' as the percentage. Then:

=> x% × $10 = $9

Simplifying:

=> 10x = $9

Dividing:

=> 10x/10 = $9/10

Answer in decimal form:

=> x% = 0.90

Converting:

=> x% = 0.90 x 100 (Converting into percentage form)

Answer in percentage form:

=> x% = 90%

Hence, 90% of $10 is $9.

Hoped this helped.

$BrainiacUser1357$

m_a_m_a [10]2 years ago

4 0

90% of 10 is 9 have a great day

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2 years ago

Find four consecutive integers such that the sum of the two largest subtracted from three times the sum of the two smallest is 7

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Answer:

18, 19, 20, 21

Step-by-step explanation:

Just like any of these problems, we should start by forming an equation for us to get a reference and plug in. We'll be using x as our variables.

As we have four consecutive integers (and not multiples) we can assume that the integers will be x, x+1, x+2, and x+3.

The sum of the two largest integers we have equals: n+2 + n+3 = 2n+5

and three times the sum of the two smallest = 3(n + n+1) = 6n+3

and the sum of t he two largest subtracted from three times the sum of the two smallest = (6n+3) - (2n+5) = 4n-2

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3 years ago

A waitress sold 12 ribeye steak dinners and 39 grilled salmon totaling $575.53 on a particular day. Another day she sold 25 ribe

Talja [164]

Answer:

cost of ribeye steak dinners = $10.36

cost of grilled salmon= $11.581

Step-by-step explanation:

Let the cost of one steak dinners be x

Let the cost of one grilled salmon be y

One a particular day the waitress sells 12 ribeye steak dinners and 39 grilled salmon for a total is $575.53 which can be written in equation as

12(x)+39(y)= $575.53-------------------------------------(1)

On another day she sells 25 ribeye steak dinners and 13 grilled salmon dinners totals to $582.43.This can be represented as

25(x)+ 13(y)= $582.43-------------------------------------(2)

solving the equation (1) and (2)

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eq(2) x 3 $125x+ 39y= 1747.29$ -------------------------(3)

Subtracting these equation we get,

$113x=1171.76$

$x=\frac{1171.76}{113}$

x= 10.36

Now substituting this in equation (1)

$12(10.36)+39(y)= $575.53$

$123.84+39y=575.53$

$39y=575.53 - 123.84$

$y=\frac{451.69}{39}$

y=11.581

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