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Greeley [361]
3 years ago
6

Can you guys help me!!!! Please make sure to include steps!!!!!

Mathematics
1 answer:
Scrat [10]3 years ago
4 0
1) 13.02-6y=8y
          +6y=6y
        13.02=14y    then divide both sides by 14. you get y= .93
2) 1/5x+5=19-1/2x
           -5=-5
    (1/5x=14-1/2x)5
     x=70-2.5x
   +2.5x=+2.5x
    3.5x=70 divide both sides by 3.5 and you get x=20
3) 7.3t+22=2.1t-22.2
  -2.1t      =-2.1t
    5.2t+22=22.2
          -22=-22
         5.2t=-44.2 divide both by 5.2 and t=-8.5
4) (1.4+2/5e=3/15e-.8)15
    21+6e=3e-12
        -3e=-3e
    21+3e=-12
   -21     =-21
         3e=-33 divide both by 3 and e=-11
5) 5(x-4)=2(2x+5)
    5x-20=4x+10
    -4x     -4x
     x-20=10
      +20=+20
          x=30
6) -7(3+t)=4(2t+6)
     -21-7t=8t+24
         +7t=+7t
    -21=15t+24
    -24=     -24
    -45=15t divide both by 15 and t=-3
7) (3/4x+6=1/3x+9)4
    3x+24=1.3x+36
   -1.3x   =-1.3x
   1.7x+24=36
         -24=-24
   1.7x    =12 divide both sides by 1.7 and x=7.06

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mixas84 [53]

Answer:

B

Step-by-step explanation:

In a triangle, the sum of any two sides must be bigger than the third.

For the first one, 10+20=30 is not greater than 30, so this is not correct.

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An aeroplanes velocity changes from 1250m/s as it comes down to land . It accelerates at 4.9m/s² . Calculate how long it took to come to a stop ?

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5 0
3 years ago
Solve each linear equation for x. (A) –12x + 9 = –15x x = (B) 4.5x + 11.5 = 8.5x + 3.5 x = (C) 23x – 9 = 13x x =
mojhsa [17]

Answer:

A. x = -3

B. x = 2

C. x = 9/10

Step-by-step explanation:

(A) –12x + 9 = –15x

Collect like terms

9 = -15x + 12x

9 = -3x

x = 9 / -3

x = -3

(B) 4.5x + 11.5 = 8.5x + 3.5

4.5x - 8.5x = 3.5 - 11.5

-4x = -8

x = -8 / -4

x = 2

(C) 23x – 9 = 13x

-9 = 13x - 23x

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x = -9 / -10

x = 9/10

5 0
3 years ago
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MatroZZZ [7]

Answer:

5(x+10)^-30-(-5) = 0

5(x+10)^-30+5=0

5x + 50 + 5 = 0

5x + 55 = 0

5x = -55

x = -55

-----

5

3 0
3 years ago
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