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andrew11 [14]
3 years ago
9

Please help with these three math questions!!!! I really need it

Mathematics
2 answers:
nikdorinn [45]3 years ago
4 0
1. is 9
and the other ones i dont really know

BARSIC [14]3 years ago
3 0
2.  replace the x by 2  and work it out 
= 7(2) - 5

3.  that cost $7.50 each  and $0.25 is taken off the cost of  any number you perchasse

so it 0.75n - 0.25

4.  Hint  the  second  (y) values are obtained from the first (x) values by multiplying  by 2
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Which are the solutions of x2 = -5x + 8?
Oksana_A [137]

Answer:

1.27, -6.27 to the nearest hundredth,

or if you require it in exact form,

-2.5 + √14.25,   -2.5 - √14.25.

Step-by-step explanation:

x^2 = -5x + 8

x^2 + 5x  = 8

Competing the square:

(x + 2.5)^2 - 6.25 = 8

(x + 2.5) = 14.25

x + 2.5 = +/-√14.25

x = -2.5 + √14.25,   -2.5 - √14.25

x = -2.5 + 3.77,  -2.5 - 3.77

= 1.27, -6.27.

6 0
3 years ago
How much will it cost to ride if the cab travels 13.5 miles?
MrMuchimi
Please provide more information. This question is not able to be answered with the information provided. Try giving the full problem!
6 0
3 years ago
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£54 is 10% off what is the the original price
Schach [20]

Answer:

48.6

Step-by-step explanation:

50/10=5

4/10=.4

54-5.4=48.6

6 0
3 years ago
Baily is training to run a marathon. The number of minutes it takes to run the marathon after t weeks of training is M= 300(0.95
Whitepunk [10]

Answer:

300=initial time and 0.05 is the amount of time shaved off of the initial time to run the marathon

Step-by-step explanation:

3 0
3 years ago
A number cube has sides that are labeled 1 to 6. Jamal rolls the number cube. What is the probability that he will roll a 22?
Tems11 [23]

-- The probability of rolling a 22 is zero.  That result is impossible, because the sides are labeled with single digits 1 through 6 .  Since 22 is not printed anywhere on the cube, it can never come up.

-- The probability of rolling a<em> 2</em> , however, is <em> 1/6</em> . <em>(B)</em>

<em></em>

The -probability of rolling something you want is always

<em>(the number of different possible results that you like) </em>

divided by

<em>(the total number of different possible results)</em>

4 0
3 years ago
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