2 years ago

9-(7-3x) = 4+x-(3-x) solve for x

Mathematics

1 answer:

Leviafan [203]2 years ago

4 0

Answer:

The answer is x= -1.

You might be interested in

d. If you double a certain number and subtrack 7 you get the same answer as when you add 5 to the number, Determine the number

umka21 [38]

Answer:

Step-by-step explanation:

Let n = the number.

2n - 7 = n + 5

n = 12

Let’s check if we got the right answer by substituting 12 for n into the original equation.

2*12 - 7 = 12 + 5

24 - 7 = 17

17 = 17

4 0

2 years ago

Mattie uses the discriminant to determine the number of zeros the quadratic equation 0 = 3x2 – 7x + 4 has. Which best describes

Eduardwww [97]

For $ax^2+bx+c=0$ the discriminant is $b^2-4ac$

there are 3 basic cases of what happens for different discriminants
1. if the discriminant is less than 0, then there are no real zeroes
2. if the discriminant is 0, then it has 1 zero
3. if the discriminant is greater than 0, it has 2 zeroes

so given
$0=3x^2-7x+4$
a=3,b=-7,c=4
thus the discriminant is $(-7)^2-4(3)(4)=49-48=1$
the discriminant is 1. 1 is positive, thus the equation has 2 zeroes because the discriminant is greater than 0

the answer is the equation has two zeroes because the discriminant is greater than 0

8 0

3 years ago

Read 2 more answers

PLEASE HELP MEEEEEE....

garik1379 [7]

Answer:

you have to find the mean, median, and mode so the 1st is that you have to add numbers and then multiple it

Step-by-step explanation:

did this in 8th grade middle school

3 0

2 years ago

A 20% alcohol solution was mixed with pure alcohol at a ratio of 4:1. What is the percentage of alcohol in the new solution?