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3 years ago

I NEED HELP PLEASE, THANKS :)

Mathematics

1 answer:

lilavasa [31]3 years ago

3 0

Answer:

C. 193.1 $m^2$

Step-by-step explanation:

<em><u>The formula for finding the area of a right trapezoid is:</u></em>

A = $\frac{1}{2} (b_{1 } +b_{2})h$

A = $\frac{1}{2} (15.3+19.5)(11.1)$

A = 193.1

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katrin2010 [14]

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2 years ago

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3 years ago

Mir evaluated 5x - (x + 3)2 for x = 2, as shown. Describe Amir's mistake and find the correct answer. 5(2) - (2 + 3)2 = 10 + (-5

sleet_krkn [62]

Answer:correct answer =0

Step-by-step explanation:

Step 1

5x - (x + 3)2

Putting the coefficient of x =2 in the equaton we have

5(2) - (2 + 3)2

Solving out

5(2) - (5)2

= 10- 10

Step 2

Amir's mistake was in the multiplication and wrong use of the negative sign of the bolded below

5(2) - (2 + 3)2 = 10 + (-5)2 = 10 + 25 = 35

-(5)2 cannot give 25 instead 10, so him getting a 25 and wrong use of the negative and positive made his answer wrong.

The right answer as calculated in step 1 = 0

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2 years ago

Read 2 more answers

A student wants to find the surface area of a triangular prism. It's bases are equilateral triangles with side lengths 7 cm and

Leviafan [203]

Answer:2. ; S ≈ 2063.6 cm. 2. 7. FOOD The can of soup has a surface area of 286.3 ... 10.0 cm. 8. The surface area of a cube is 294 square inches. Find the length of a ... Find the length of the third side of the triangle. ... 16. triangular prism: h = 6 inches, right triangle base with ... triangular prism, the triangles should be equilateral,.

Step-by-step explanation:2. ; S ≈ 2063.6 cm. 2. 7. FOOD The can of soup has a surface area of 286.3 ... 10.0 cm. 8. The surface area of a cube is 294 square inches. Find the length of a ... Find the length of the third side of the triangle. ... 16. triangular prism: h = 6 inches, right triangle base with ... triangular prism, the triangles should be equilateral,.

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3 years ago

A researcher is interested in estimating the difference in two population proportions. A sample of 400 from each population resu

sergey [27]

Answer: (-0.086, 0.026)

Step-by-step explanation:

The confidence interval for the difference of two population proportion is given by :-

$p_1-p_2\pm\ z_{\alpha/2}\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}$

Given : Significance level : $\alpha: 1-0.90=0.10$

Critical value : $z_{\alpha/2}=1.645$

Sample size : $n_1=400,\ n_2=400$

$p_1=0.61,\ p_2=0.64$

The 90% confidence interval for the difference in the population proportions will be :-

$0.61-0.64\pm\ (1.645)\sqrt{\dfrac{0.61(1-0.61)}{400}+\dfrac{0.64(1-0.64)}{400}}\\\\\approx-0.03\pm0.056=(-0.03-0.056,-0.03+0.056)\\\\=(-0.086, 0.026)$

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3 years ago