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3 years ago

Please help me?!!!!!!!!!!

Mathematics

1 answer:

seropon [69]3 years ago

8 0

Answer:

the answer would be 1.653 I think I'm not totally sure... sorry

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A limited-edition poster increases in value each year with an initial value of $18. After 1 year and an increase of 15% per year

Andru [333]

Answer:

$y = 18 * 1.15^x$

Step-by-step explanation:

Given

$a = 18$ --- initial

$r =15\%$ -- rate

Value after a year = $20.70

Required

Expression to calculate its value after y years

This is calculated using:

$y = ab^x$

Where

$b=1 +r$

Substitute $r =15\%$ in $b=1 +r$

$b = 1 + 15\%$

$b = 1 + 0.15$

$b = 1.15$

Substitute $b = 1.15$ and $a = 18$ in $y = ab^x$

$y = 18 * 1.15^x$

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2 years ago

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vredina [299]

16 is 40 because you just need to add 16 to 14 and to 10 which is equal 40

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3 years ago

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3 years ago

Find the area of a square with a length of 5 cm.

Diano4ka-milaya [45]

<span>area of a square = a^2 = 5^2 = 25

answer
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3 0

3 years ago

A student solved 3/x−4=x/7 in six steps, as shown.

Stolb23 [73]

Answer:

Option A.

Step-by-step explanation:

The given equation is

$\dfrac{3}{x-4}=\dfrac{x}{7}$

Step 1: Multiply both sides by (x-4).

$3=\dfrac{x(x-4)}{7}$

Step 2: Multiply both sides by 7.

$21=x(x-4)$

Step 3: Using distributive property.

$21=x^2-4x$

Step 4: Isolate all terms on one side.

$0=x^2-4x-21$

Step 5: Find factors by splitting the middle term.

$0=x^2-7x+3x-21$

$0=x(x-7)+3(x-7)$

$0=(x-7)(x+3)$

Step 6: Using zero product property, we get

$x=-3, x=7$

It means student solved the equation correctly.

Therefore, the correct option is A.

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3 years ago

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