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Natali [406]
3 years ago
7

Given f(x) = 8x-15, find x when f(x) =9

Mathematics
1 answer:
lawyer [7]3 years ago
3 0

Answer:

72-15 = 57

Step-by-step explanation:

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Sales tax on an item directly proportional to the cost of the items purchased. If the tax on a $400 item is $24, what is the sal
ArbitrLikvidat [17]

Answer:

$21

Step-by-step explanation:

This can be easily solved by fraction 400/24=350/x

x=$21

4 0
3 years ago
A shop keeper has offered an item for sale. Its label price is Rs . It is not sold in one-month period and after one month its l
BigorU [14]

Answer:

x = Rs 20,833.33

the value of x is Rs 20,833.33

Step-by-step explanation:

Let x,y and z represent the price of the item initially, after one month and after two months respectively.

Given that;

after one month its label price is reduced by 20%

y = x - 20% of x

y = x - 0.20x

y = 0.80x ........1

after 2 months its reduced price is further reduced by 10% and then sold it for Rs 15000.

z = y - 10% of y

z = y - 0.10y

z = 0.90y ........2

Substituting equation 1 into 2;

z = 0.90(0.80x)

z = 0.72x

Also z = Rs 15000

So,

z = 0.72x = Rs 15000

0.72x = Rs 15000

x = Rs 15000/0.72

x = Rs 20833.33333333

x = Rs 20,833.33

the value of x is Rs 20,833.33

5 0
3 years ago
A pizza company charges $8 for a large pizza and a $5 delivery charge. Write an equation that gives the
cupoosta [38]
8p +5 = $29
The above is the equation

If you want to know how many pizza were ordered then you subtract 5 from each side of the equal sign then you would have 8p=24 then divide by 8 on both sides of equal sign . p= 3 ; so 3 pizzas were order plus a charge of $5 for delivery.
3 0
2 years ago
Tej ran 2000 metres in 15mins. what was his average speed in km/h?
Deffense [45]
His average speed in kilometers per hour is 8
8 0
4 years ago
Find the Slope intercept form using points (-5,-1) and (2,3)
MariettaO [177]

Answer:

y = 4/7x + 13/7

Step-by-step explanation:

m = 3+1/2+5 = 4/7

i used the coords (-5, -1)

y + 1 = 4/7 (x+5)

y + 1 = 4/7x + 20/7

y = 4/7x + 20/7 - 1

y = 4/7x + 13/7

7 0
3 years ago
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