3 years ago

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Mathematics

1 answer:

Llana [10]3 years ago

3 0

K is -3 * 4 or -12 or C

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If 2a = 3b, and 4a - 7 = 2b + 9. what is the value of a?

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1.5

Step-by-step explanation:

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3 years ago

240 televisions of a store are are high definition. These 240 televisions make up 80% of the televisions. How many televisions a

Eddi Din [679]

Answer:

300

Step-by-step explanation:

Let's call N the total number of televisions. We have that 240 televisions make up of 80% of the total number of televisions, so we can rewrite it as

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where 0.80 means 80 % ( $\frac{80}{100}=0.8$ . By solving the equation above, we find

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3 years ago

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julsineya [31]

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Step-by-step explanation:

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3 years ago

The sales tax rate is 8.25%. Estimate the sales tax<br> on a book that costs $18.50.

eimsori [14]

Answer:

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Step-by-step explanation:

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4 years ago

Read 2 more answers

If t varies inversely as a and t= 2 when a = -4, what is t when a = 1/3?

bezimeni [28]

Answer:

t = - 24

Step-by-step explanation:

Given t varies inversely as a then the equation relating them is

t = $\frac{k}{a}$ ← k is the constant of variation

To find k use the condition t = 2 when a = - 4

2 = $\frac{k}{-4}$ ( multiply both sides by - 4 )

- 8 = k

t = $\frac{-8}{a}$ ← equation of variation

When a = $\frac{1}{3}$ , then

t = $\frac{-8}{\frac{1}{3} }$ = - 24

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3 years ago