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Finger [1]
3 years ago
7

Solve this equation for x in terms of y and z:

Mathematics
2 answers:
lora16 [44]3 years ago
6 0

Answer:

x = 5

Step-by-step explanation:

9x + 3y + 4z = 24

9x + 3(9) + 4(-12) = 24

9x + 27 + (-48) = 24

9x + 27 - 48 = 24

9x - 21 = 24

9x = 24 + 21

9x = 45

x = 45 ÷ 9

x = 5

Alex Ar [27]3 years ago
4 0
3y = 3 * 9 = 27
4z = 4 * -12 = -48
: -48 + 27 = -21
: -21 + x = 24
: X = 45.
I hope that makes sense.
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Kari has x green apples and y red apples. Which statement explains why x + y and y + x will each find the total number of apples
ehidna [41]
X+y and y+x are the same as stated by the commutative law.
This is because let’s say x=2 and y=3,
2+3=5 and 3+2=5
3 0
2 years ago
I WILL AWARD BRAINLIEST!! PLEASE HELP!!
den301095 [7]

Answer:

1) x = (a+c)/b

2) The equation is correct no matter what value x takes.

Step-by-step explanation:

1) a−(a+b)x=(b−a)x−(c+bx)

<=> a - ax - bx = bx - ax - c - bx

<=> a - ax - bx - (bx - ax - c - bx) = 0

<=> a - ax - bx - bx + ax + c + bx = 0

<=> a - ax + ax - bx - bx + bx + c = 0

<=> a - bx + c = 0

<=> bx = a + c

If b ≠ 0, x = (a+c)/b

2) 2(3x−5a)+9(2a−7b)+3(5a−2x)=0

<=> 2×3x + 2×(-5a) + 9×2a + 9× (-7b) + 3×5a + 3×(-2x) = 0

<=> 6x -10a + 18a - 63b + 15a - 6x = 0

<=> (6x - 6x) + (15a - 10a + 18a) - 63b = 0

<=> 23a - 63b = 0

<=> 23a = 63b

=> a = 63b/23

with all values of x, the equation is correct.

3 0
3 years ago
Read 2 more answers
Select the equations where x = 8 is the solution. Select all that apply (select 3).
seraphim [82]

Answer:

Step-by-step explanation:

1. x - 2 = 10

x = 10 + 2 = 12

2. 40 = 5x

40/5 = x

x = 8

3. x/2 = 8

Multiply by 2 on both sides

x = 16

4. x + 14 = 24

x = 24 - 14 = 10

5. x + 2 = 10

x = 10 - 2 = 8

6. x/8 = 1

Multiply by 8 on both sides

x = 8

No 2 5 and 6 is the correct answer

3 0
3 years ago
Select all of the quotients that have the same value as 5.04 divided by 7
defon

Answer: 2 and 4

Step-by-step explanation: the quick way is by dividing all the answer options

6 0
3 years ago
I need help hah lol " It's too short. Write at least 20 characters to get a great answer. " there.
marishachu [46]

Answer:

54.872

Step-by-step explanation:

volume of a cube = s³

where s = side length

side length given here is 3.8

so volume = 3.8³ = 54.872

7 0
2 years ago
Read 2 more answers
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