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ryzh [129]
3 years ago
13

Determine whether the following expressions are equivalent to 8/7(21+42b)

Mathematics
1 answer:
Elina [12.6K]3 years ago
6 0
8(21+42b)/7

8(21+42b) = 168 + 336b

(168 + 336b)/7 = (24+ 48b)
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Give a description of a 3/4- turn of the minute hand on a clock face.
Rom4ik [11]
If the minute hand has turned 3/4 of the way around the face, it is equal to 45 minutes. (45/60)
7 0
3 years ago
Read 2 more answers
WHO CAN HELP AT LEAST ONEBOF THEM I NEED HELP ASAP
lapo4ka [179]

Answer:

9. n=-15 , 10. f=6, sorry i can't help you more I am just tired and have to get some rest but i hope this helps

Step-by-step explanation:

9. Eight less than 1/3 a number n is -13

so -13 = 1/3n -8

then

-5 = 1/3n

multiply 3 to each side

-15 = n

10. a number f multiplied by -12.3 is -73.8

so -12.3f= -73.8

divide -12.3 on each side

so f=6

4 0
3 years ago
5(2x - 3) + 2 (3x + 1)
astraxan [27]
     <span> 1/3(2x - 3) + 1 = 1/4(3x + 5) - 2
2x/3 - 3/3 + 1 = 3x/4 + 5/4 - 2
2x/3 - 1 + 1 = 3x/4 + 5/4 - 2
2x/3 - 3x/4 - 0 = 3x/4 - 3x/4 + 5/4 - 2
2x*4/3*4 - 3x*3/4*3 = 0 + 5*1/4*1 - 2*4/1*4
8x/12 - 9x/12 = 5/4 - 8/4
(8x - 9x)/12 = (5 - 8)/4
-x/12 = -3/4
-x/12 * 12 = -3/4 * 12
-x = -36/4
-x * -1 = -36/4 * -1
x = 36/4
x = 9
Done

For check the answer
let x = 9
1/3(2[9] - 3) + 1 = 1/4(3[9] + 5) - 2
1/3(18 - 3) + 1 = 1/4(27 + 5) - 2
1/3(15) + 1 = 1/4(32) - 2
15/3 + 1 = 32/4 - 2
15/3 + 3/3 = 32/4 - 8/4
18/3 = 24/4
6 = 6
therefor
x = 9 is a correct answer</span>
6 0
3 years ago
Solve the system by substitution.<br> — 6x — 5y = 11<br> x = у
Margarita [4]

Answer:

(x, y) =(-1, - 1)

Step-by-step explanation:

-Substitute the value of x

-solve the equation

-Substitute the value of y

-check the possible solution

-check solution

-simplify

5 0
3 years ago
Image should be below
Verizon [17]
Whatttt isss thissssss
8 0
3 years ago
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