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3 years ago

Use the Means-Extremes Property to solve for x. 57 =9x x =

Mathematics

1 answer:

777dan777 [17]3 years ago

3 0

Answer:

x = 12.6

Step-by-step explanation:

When you have one fraction equated to another one, the means-extremes property allows you to cross multiply, as follows:

$\frac{a}{b} = \frac{c}{d}$

can be rewritten as:

a*d = c*b

For this case:

$\frac{5}{7} = \frac{9}{x}$

5*x = 7*9

x = 63/5

x = 12.6

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Which expression is equivalent to (3 x minus 5 y) + (x + 2 y)?

Alex73 [517]

Answer:c

Step-by-step explanation:

3 0

3 years ago

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Two brothers, Mark and Walter, each inherit $20000. Mark invests his inheritance in a savings account with an annual return of 2

Igoryamba

Answer:

$720

Step-by-step explanation:

$20000 - 100%

$x. - 2.5%

x=(20000*2.5)/100=500

20000+500=$20500 in one year (Mark)

20000 - 100

x. - 6.1

x= (20000*6.1)/100 = 1220

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21220-20500= $720 more (Walter will have after 1 year)

3 0

3 years ago

Straight line A has the equation y = 3x + 2. Find the equation of the line parallel to A and goes

arlik [135]

Answer:

y = 3x - 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 3x + 2 ← is in slope- intercept form

with slope m = 3

Parallel lines have equal slopes , then

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To find c substitute (3, 8 ) into the partial equation

8 = 9 + c ⇒ c = 8 - 9 = - 1

y = 3x - 1 ← equation of parallel line

6 0

3 years ago

Which is the value of this expression when p=-2 and q=-1?

saul85 [17]

Answer:

D. 4

Step-by-step explanation:

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3 years ago

Identify the simplest form of each ratio. 20 : 30 18 : 27 24 : 32 56 : 49 48 : 42 36 : 48 24 : 36 16 : 14 9 : 12

harkovskaia [24]

Answer:

2:3 2:3 3:4 8:7 8:7 3:4 2:3 8:7 3:4

Step-by-step explanation:

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2 years ago