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3 years ago

Figure this out for 15 points

Mathematics

1 answer:

garri49 [273]3 years ago

3 0

Step-by-step explanation:

Joe's climbing rate is not constant

3 × 2 = 6

8 × 1.5 = 12

12 × 1.1666666667 = 14

Time when climber reaches 30ft is unknown because climbing rate is not constant

Zas's climbing rate is 2.5

2 × 2.5 = 5

4 × 2.5 = 10

12 × 2.5 = 30

At 12 seconds, Zas reaches 30 feet.

Stephen's climbing rate is 4

2 × 4 = 8

4 × 4 = 16

6 × 4 = 24

30 ÷ 4 = 7.5

7.5 × 4 = 30

At 7.5 seconds, Stephen reaches 30 feet.

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2 years ago

(i) Challenge: Thembi received 8% discount on an item which cost

Paul [167]

Answer:

$x = 0.25$

Step-by-step explanation:

Given

$Cost\ Price = 6 + x$

$Discount =8\%$

$Amount\ Paid = R6 - x$

Required

Find x

First, we calculate the amount paid in terms of the cost price.

This is calculated using:

$Amount\ Paid = Cost\ Price * (100\% - Discount)$

$Amount\ Paid = (6 + x) * (100\% - 8\%)$

$Amount\ Paid = (6 + x) * 92\%$

Express as decimal

$Amount\ Paid = (6 + x) * 0.92$

Open bracket

$Amount\ Paid = 5.52 + 0.92x$

So, we have:

$Amount\ Paid = 5.52 + 0.92x$ and

$Amount\ Paid = R6 - x$ ---- given

Equate both

$6 - x = 5.52 + 0.92x$

Collect like terms

$- x -0.92x= 5.52-6$

$-1.92x= -0.48$

$1.92x= 0.48$

Solve for x

$x = \frac{0.48}{1.92}$

$x = 0.25$

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2 years ago

Someone help pls! Step by step pls

Rom4ik [11]

That’s how you plug it in and get the answer because when you plug in z and y value correctly you just have to follow the rule and simplify
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3 years ago

Read 2 more answers

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3 years ago

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Answer:

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Hope this helps. <em>lmk</em>.

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