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3 years ago

Given that f(x) = 3x - 4 complete the table below

Mathematics

1 answer:

Ksju [112]3 years ago

5 0

Answer:

if x = -2, y = -10

if x = 0, y = -4

if y = -1, x = 1

Step-by-step explanation:

if x = -2:

f(-2) = 3(-2) - 4

f(-2) = -6 - 4

f(-2) = -10

if x = 0:

f(0) = 3(0) - 4

f(0) = 0 - 4

f(0) = -4

if y = -1

-1 = 3(x) - 4

3 = 3(x)

x = 1

-Chetan K

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Aneli [31]

Answer:

For the 9% she invested $2,300

For the 10% she invested $2,500

Step-by-step explanation:

Let the amount invested be $x and $y in both cases respectively

Since the total invested is $4,800

This means that;

x + y = 4800 ••••••••••••(i)

Now let’s have a look at the interests.

For the 9%

Interest would be 9/100 * amount invested

= 9/100 * x = 9x/100

For the 10%, interest would be

10/100 * y = 10y/100

Adding both will give a total of 457

9x/100 + 10y/100 = 457

multiply through by 100

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From equation i, we can write x = 4800 - y

we can substitute this into the second equation

9(4800-y) + 10y = 45700

43200 -9y + 10y = 45,700

43200 + y = 45,700

y = 45,700-43,200 = $2,500

Recall

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so x = 4800 -2500 = 2300

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4 years ago

Terri is starting a babysitting service to make some extra money. She plans to charge a base fee of $10 plus $7 per hour. Write

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Given:

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Solution:

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Step-by-step explanation:

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Answer:

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