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sesenic [268]
3 years ago
15

Quick question please help

Mathematics
1 answer:
emmainna [20.7K]3 years ago
8 0

Answer:

use the area formulae for trapezium

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On Monday Jill ought 3 teas and 5 coffees for £10.50 On Tuesday she bought 4 teas and 4 coffees for £10 On Wednesday she bought
Lynna [10]

Answer:

my dude that likes crazy hard I feel bad for u cuz I've been trying to figure it out and still can't seem to get it and I even asked 3 adults and they couldn't help me either

7 0
2 years ago
The Super Shop and Save store had 120 gallons of milk placed on the shelf one night. During the next morning's inspection, the m
Sergeeva-Olga [200]
18 gallons of milk had passed the expiration date.

Explanation step by step

Multiply 120x 15%
Turn 15% into a decimal which is 0.15 so now it’s 120x0.15 which equals to 18.
8 0
4 years ago
Find the measurements (the length L and the width W) of an inscribed rectangle under the line with the 1st quadrant of the x &am
Leni [432]

The question is incomplete. Here is the complete question.

Find the measurements (the lenght L and the width W) of an inscribed rectangle under the line y = -\frac{3}{4}x + 3 with the 1st quadrant of the x & y coordinate system such that the area is maximum. Also, find that maximum area. To get full credit, you must draw the picture of the problem and label the length and the width in terms of x and y.

Answer: L = 1; W = 9/4; A = 2.25;

Step-by-step explanation: The rectangle is under a straight line. Area of a rectangle is given by A = L*W. To determine the maximum area:

A = x.y

A = x(-\frac{3}{4}.x + 3)

A = -\frac{3}{4}.x^{2}  + 3x

To maximize, we have to differentiate the equation:

\frac{dA}{dx} = \frac{d}{dx}(-\frac{3}{4}.x^{2}  + 3x)

\frac{dA}{dx} = -3x + 3

The critical point is:

\frac{dA}{dx} = 0

-3x + 3 = 0

x = 1

Substituing:

y = -\frac{3}{4}x + 3

y = -\frac{3}{4}.1 + 3

y = 9/4

So, the measurements are x = L = 1 and y = W = 9/4

The maximum area is:

A = 1 . 9/4

A = 9/4

A = 2.25

6 0
3 years ago
During summer, when the snow melts, the water level of the Yukon River increases. If the water level of the river increased by 4
Paul [167]

Answer:

11

Step-by-step explanation:

8 0
3 years ago
A container contains 10 diesel engines. the company chooses 8 engines at​ random, and will not ship the container if any of the
lions [1.4K]

Answer:

16/25

Step-by-step explanation:

We just have to find the probability that the 8 non-defects are chosen.

1. Chance first defect is undetected: 8/10 = <em>4/5</em>

2. Chance second defect is undetected: <em>4/5</em>

3. Total probability': 4/5 * 4/5 = 16/25

7 0
3 years ago
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