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3 years ago

Help with Mathematics please. Thanks

Mathematics

2 answers:

jekas [21]3 years ago

8 0

The answer would be your last option, D, 168 cm sq

Hope this helped!

maks197457 [2]3 years ago

7 0

I got 168. Calculate the areas of all the shapes and add together

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What’s the area of this trapezium

nata0808 [166]

Step-by-step explanation:

Area of trapezium

=1/2 h(a+b)

=1/2 2(6+4)

=1/2 2.10

=1/2 20

=10cm. cm

5 0

3 years ago

Read 2 more answers

Simplify (a+b)^3 + (a-b)^3 + 6a(a^2-b^2)

11111nata11111 [884]

Answer:

8a^3.

Step-by-step explanation:

(a+b)^3=a^3+b^3+3a^2b+3ab^2

(a-b)^3=a^3-b^3-3a^2b+3ab^2

(a+b)^3+(a-b)^3=2a^3+6ab^2

According to the question

(a+b)^3+(a-b)^3+6a(a^2-b^2)

Put in the value

=2a^3+6ab^2 +6a^3–6ab^2

=8a^3

7 0

4 years ago

A sales and marketing management magazine conducted a survey on salespeople cheating on their

Alenkinab [10]

Answer:

The 95% confidence interval estimate of the population proportion of managers who have caught salespeople cheating on an expense report is (0.5116, 0.6484).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

In the survey on 200 managers, 58% of the managers have caught salespeople cheating on an expense report.

This means that $n = 200, \pi = 0.58$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.58 - 1.96\sqrt{\frac{0.58*0.42}{200}} = 0.5116$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.58 + 1.96\sqrt{\frac{0.58*0.42}{200}} = 0.6484$

The 95% confidence interval estimate of the population proportion of managers who have caught salespeople cheating on an expense report is (0.5116, 0.6484).

7 0

3 years ago

CAN SOMEONE OLEASE HELP MEEE

stellarik [79]

Answer:

y = -1/4 (x + 2)² + 4

Step-by-step explanation:

y = -1/4x² - x + 3

y = - 1/4 ( x² + 4x - 12)

y = -1/4 (x² + 4x + 4) + 3 + 1

Y = -1/4 (x + 2)² + 4

8 0

3 years ago

Can someone please help me with this math problem? ASAP. It’s a system of equations word problem. Can you please do the work whe

MrRa [10]

Answer: A van can carry 18 students and a bus can carry 59 students.

Step-by-step explanation:

Let x represent the number of students that a van can carry.

Let y represent the number of students that a bus can carry.

The Senior class at high school A rented and filled one van and 6 buses with 372 students. This means that the number of students that entered the van is x × 1 = x.

Also, the number of students that entered the buses is y × 6 = 6y. Therefore,

x + 6y = 372 - - - - - - - - - - - - -1

The Senior class at high school B rented and filled 4 vans and 12 buses with 780 students. This means that the number of students that entered the vans is x × 4 = 4x.

Also, the number of students that entered the buses is y × 12 = 12y. Therefore,

4x + 12y = 780 - - - - - - - - - - - - -2

We would eliminate x by multiplying equation 1 by 4 and equation 2 by 1. It becomes

4x + 24y = 1488 - - - - - - - - - - - - -3

4x + 12y = 780 - - - - - - - - - - - - -4

Subtracting equation 4 from equation 3, it becomes

12y = 708

y = 708/12

y = 59

Substituting y = 59 into equation 1, it becomes

x + 6 × 59 = 372

x + 354 = 372

x = 372 - 354

x = 18

6 0

4 years ago