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Novay_Z [31]
2 years ago
13

(9x−2.25)=(1.6+9x) help

Mathematics
1 answer:
mel-nik [20]2 years ago
4 0
Begin solving like you normally would. Add 2.25 to both sides and subtract 9x from both sides to try getting all x values on one side. However, you will find that after subtracting 9x from both sides, all x values go away, and you end with -2.25=1.6. This is not true (-2.25 is not 1.6), so the answer is no solution. There is no value of x which satisfies that equation.
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John and Emily are brother and sister. John has as many brothers as sisters, and Emily has twice as many brothers as sisters. Ho
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Answer:

4 boys, 3 girls

Step-by-step explanation:

brothers of John ⇒ x

sisters of John ⇒ y

John has as many brothers as sisters:

  1. x = y

brothers of Emily ⇒ x + 1 (Emily have the same amount of brother as John, plus one (John))

sisters of Emily ⇒ y -1 (Emily have the same amount of sister as John, minus one (herself))

Emily has twice as many brothers as sisters:

  1. 2 (y-1) = x+ 1

Now we have a system of 2 equations and 2 variables

x=y (I)

2y - 2 = x + 1 (II)

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Replace x in equation II

2y - 2 = y + 1

2y - y = 2 + 1

y = 3

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Replace y in equation I

x = y = 3

That mean that John have 3 brothers plus himself, there is 4 boys in the family and John have 3 sister, so there is 3 girls in the family

8 0
3 years ago
Which is the best description for this histogram?
pshichka [43]

Answer: it is a

Step-by-step explanation: i got it right

7 0
3 years ago
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Can someone help me on this ?<br><br> 6 ÷ 2 [ 1 + 2 ] = ????
Anarel [89]

Answer: 9

Step-by-step explanation:  6 ÷ 2 [ 1 + 2 ]

                                               6 ÷ 2 [ 3 ]

                                               (3)(3)

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3 0
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Evaluate -3x 3 - 4x for x = -1. 1 7 -1
7nadin3 [17]
-3x^{3}-4x
=-3(-1)^{3} -4(-1)
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5 0
2 years ago
Frankie earns $200 a day plus a 6% commision on everything he sells . Today he sold $450 products . How much did he earn in tota
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Answer:

$227

Step-by-step explanation:

6% = .06

450 * .06 = 27 commission

200 + 27 = $227

3 0
3 years ago
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