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3 years ago

What is the value of x in 8/9x = 4/3

2 answers:

5 0

X= 3/2 because when you divide 4/3 by 8/9 it actually becomes 4/3 times 9/8 then you multiply the top and bottom and simplify

Talja [164]3 years ago

4 0

X= 3/2 you multiply the inverse (9/8) and then you probably know what to do

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Evaluate -(a + b), given values a = -4, b = - 12.

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The answer would be -16

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3 years ago

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Work out 6 x £85.20 help please math homework for tomorrow!

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I think the. answer is 511.2

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4 years ago

Suppose the manager of a gas station monitors how many bags of ice he sells daily along with recording the highest temperature e

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3 years ago

Which pair of words describes this system of equations 3y=9x-6 2y+6x=4

pishuonlain [190]

Answer:

Consistent and dependent

Step-by-step explanation:

Given

$3y = 9x - 6$

$2y + 6x = 4$

Required

The words that describe the equations

Make y the subject in (2)

$2y + 6x = 4$

Collect like terms

$2y = 4 - 6x$

Divide through by 2

$y = 2 - 3x$

Substitute: $y = 2 - 3x$ in (1)

$3y = 9x - 6$

$3(2 - 3x) = 9x - 6$

$6 - 9x = 9x - 6$

Collect like terms

$9x+9x = 6+6$

$18x = 12$

Solve for x

$x = \frac{12}{18}$

Simplify

$x = \frac{2}{3}$

Substitute $x = \frac{2}{3}$ in $y = 2 - 3x$

$y = 2 - 3*\frac{2}{3}$

$y = 2 - 2$

$y =0$

So, we have:

$x = \frac{2}{3}$ and $y =0$

<em>The system is consistent because it has at least 1 solution</em>

<em>The system is dependent because it has more than 1 solution</em>

6 0

3 years ago

Your beginning balance on your lunch account is $42. You buy lunch for $1.80 every day and sometimes buy a snack for $0.85. Afte

tangare [24]

Answer:

The answer to your question is: I bought 7 snacks

Step-by-step explanation:

Data

beginning balance = $42 = b

lunch = $1.80 = l

snack = $ 0.85 = s

final balance = $0.05 = f

f = b - 1.8l - 0.05s

0.05 = 42 - 1.8l - 0.85s

After 20 days I spent = 1.8(20) in lunches = $36

0.05 = 42 - 36 - 0.85s

0.05 = 6 - 0.85s

0.05 - 6 = -0.85s

-5.95 = -0.85s

s = -5.95/-0.85

s = 7

4 0

3 years ago