Four less than the product of a number and 7 is eight more than that number

Answers

Answer 1

Answer: Let the number be x, then 7x - 4 = x + 8
7x - x = 8 + 4
6x = 12
x = 12/6 = 2.

Therefore, the number is 2.

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Suppose is a semester that 38% of students at a college failed mathematics, 27% failed physics, and 9% failed both. A student is selected at random.a)If a student failed physics, what is the probability that he or she failed math?
b)If a student failed math, what is the probability he or she failed physics?
c)What is the probability that he or she failed math or physics?

Answers

Hello,

A) failed in Phys: 27 failed in Math ==> intersection : 9/27=1/3

B)Failed in Math 38 ,failed in Phys ==>9/38

C) M∪P=M+P-M∩P= (38+27-9)/100=56/100=14/25

Probabiliy is hard for me.

What is the slope of the line that contains the points (-2, 8) and (-2, 1)?9

4

undefined

- 7

4

0

Answers

slope of the line = m

(y-y')= m (x-x')
(8-1)= m {-2 -(-2)}
7 = m (-2+2)
7 = m x 0
m= (7÷0)

so m is undefined.

so; the slope of the line is undefined... :)

50% of all the cakes Jenny baked that week were party cakes,1/5 were fruit cakes and the remainder were sponge cakes. What percentage of cakes were sponge cakes?

Answers

Convert 1/5 into a decimal. Which is .20 or 20% and 20+50=70 100-70= 30%

How does the answer for this 09:009 is 10??

Answers

Hello,

0.09/0.009=(9/100) / (9/1000)=9/100 * 1000/9=10.
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Change the fraction to a decimal: 13/50

Answers

$(13)/(50)=(13\cdot2)/(50\cdot2)=(26)/(100)=0.26$

I am greater the 4 tens and less then 5 tens.i have 9 ones what am i ?

Answers

49...

Think of four 10's as
40

And five 10's as
50

It states that you have 9 ones so add to 40
or subtract from 50

49 is more than 40
49>40
and is less than 50
49<50

Good Luck future questions :)

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