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Komok [63]
3 years ago
11

I don’t know how to solve the equation

Mathematics
1 answer:
Artemon [7]3 years ago
8 0
To solve this equation we have to factor.
We are looking for 2 numbers with a sum of -3, and multiplied they have to be -28. These numbers are -7 and 4.

So:
{x}^{2}  - 3x - 28 = 0
(x - 7)(x + 4) = 0
x - 7 = 0 \:  \:  \:  \: x + 4 = 0
x = 7 \:  \:  \:  \: x =  - 4

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Solve for m 1/C+1/m=1/z
9966 [12]
Answer:  " m = zC / (C − z) " .
___________________________________
Explanation:
_________________________
Given:  1/C + 1/m = 1/z ;  Solve for "m".

Subtract  "1/C" from each side of the equation:
____________________________________
1/C + 1/m − 1/C = 1/z − 1/C  ;

to get:  1/m = 1/z − 1/C ;
____________________________________
Now, multiply the ENTIRE EQUATION (both sides); by "(mzC"); to get ride of the fractions:
_________________

mzC {1/m = 1/z − 1/C} ;

to get:  zC = mC − mz ;

Factor out an "m" on the "right-hand side" of the equation:

zC = m(C − z) ;  Divide EACH side of the equation by "(C − z)" ; to isolate "m" on one side of the equation;

zC / (C − z) = m(C − z) / m ;  to get:   24/8 = 3  24

zC/ (C − z) = m ;   ↔   m = zC/ (C − z) .
___________________________________________________
4 0
3 years ago
Need help am being timed pls
goldenfox [79]
What are the answer options?
6 0
2 years ago
Write “252 miles per 8 gallons” as a rate in simplest form.
Nina [5.8K]
Okay so since we have to put 252 miles per 8 gallons into the simplest form I'm going to say that we divide 252/8=31.5 so we should have 31.5 miles per gallon as our answer
3 0
3 years ago
HELP, I WILL GIVE ALOT OF POINTS AND BRAINLYEST
Natasha2012 [34]

Answer:

C

Step-by-step explanation:

first, let's find the midpoint of line TR.

((x1+x2)/2, (y1+y2)/2)

(4+8)/2= x-coordinate= 6

(-4+-4)/2=y-coordinate=-4

(6,-4) is the point of A

now, use the distance formula for U (5,-6) and A (6,-4)

d= sqrt (x2-x1)^2 + (y2-y1)^2

d= sqrt (6-5)^2 + (-4-(-6))^2

d= sqrt (1+4)

d= sqrt 5

C. sqrt 5

7 0
4 years ago
Mavis wants to buy a book. She has $25, which is $9 less than she needs.
Airida [17]

Answer:

$34.00

Step-by-step explanation:

Add 9 to 25 to find your answer

3 0
3 years ago
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