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Alex
3 years ago
15

PLZZZ HELPPPPPPP LAST QUESTIONS LAST CHANCE FOR POINTSSSS REWARD BRAINLIESTT

Mathematics
2 answers:
vlada-n [284]3 years ago
8 0

Answer:

17)x=12, -7

18)x=+2, -2

19)(2x-5)(3x+1)

20)3(5x+4)(x-2)

Step-by-step explanation:

17) (x-12)(x+7)=0

x=12, -7

18)3x^2-12=0

3x^2=12

x^2=4

x=+2, -2

19)(ax+b)(cx+d)

Ax^2+Bx+C

A=6, B=-13, C=-5

ac=6

ad+bc=-13

bd=-5

a=2

b=-5

c=3

d=1

(2x-5)(3x+1)

20)3(5x^2-6x-8)

=3(5x+4)(x-2)

Hope I helped! And also, is this really college math? I'm in middle school and I know how to do it!

Can you give me brainliest, since I did all of them?

Nimfa-mama [501]3 years ago
3 0

Answer:

question 19

(2x-5)(3x+1)

Step-by-step explanation:

question 19

6x^2-13x-5

6x^2 coefficient = 6

-13x coeddicient = -13

-5 is constant

multiply coefficient of first term by the constant

i.e. 6*-5= -30

get 2 factors of -30 whoose sum equals -13

-15 +2 = -13

rewrite to have

6x^2-15x+2x-5

3x(2x-5) the firs term

1(2x-5)

add up,

(3x+1)(2x-5)

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Find the value of x<br> -3x - 5 = 16
Kazeer [188]

Answer:

x=-7

Step-by-step explanation:

so if you multiply two negative numbers you get a positive and and -7 * -3 is just doing 3*7 which is 21 and that is the answer to -3*-7 and 21 minus 5 is 16 so there´s that and hope this helps

6 0
3 years ago
If a square has breath of 13 cm what would be the lenght and perimeter ?​
Kitty [74]

Answer:

The square will have length 13 cm only and it's perimeter will be:

4l

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I hope it helps you

3 0
2 years ago
Choose 3 values that would make this inequality true. 9 - n ≥ 4
Alenkasestr [34]

Answer: Could be 0,1,2,3,4,5

Step-by-step explanation: 9-n has to be greater or equal to four. 9 minus 4 is five. So all of the answers must be positive numbers that are less than five.

6 0
2 years ago
2) university theater sold 556 tickets for a play. tickets cost $22 per adultand $12 per senior citizen. if total receipts were
harina [27]
About 708 or 707.6666666667
7 0
2 years ago
How do u do this problem: W/6+5/8=-1 3/8 <br> I got this answer: -1 53/64
Kobotan [32]
We have question
\frac{W}{6}+ \frac{5}{8} =-1 \frac{3}{8}    
\frac{W}{6} + \frac{5}{8} =- \frac{11}{8}  <span> /*8      (multiply both sides by 8)</span>
\frac{W8}{6} + \frac{5}{1} =- \frac{11}{1}  /*6      (multiply both sides by 6)
8W+5*6=-11*6      /-30 both sides
8W=-66-30
8W=-96
W=-12
6 0
2 years ago
Read 2 more answers
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