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3 years ago

Please answer correctly !!!!!! Will mark Brainliest answer !!!!!!!!!!!!!!

Mathematics

1 answer:

Natasha_Volkova [10]3 years ago

6 0

Answer:

See below

Step-by-step explanation:

$(x + 15)^2 - 10 = 0\\(x + 15)^2 = 10 \\(x + 15) = \pm\sqrt {10} \\x + 15 = \pm 3.16227766\\x + 15 = \pm 3.16\\x = \pm 3.16 - 15\\x = 3.16 - 15 \: or \: x = - 3.16 - 15\\x = - 11.84\: or \: x = - 18.16\\lesser\: x = \boxed{-18.16}\\\\greater\: x = \boxed{-11.84}\\\\$

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The scores on a test for a sample of 42 statistics students are summarized in the following table. 9, 90, 18, 80, 15, 70. Find t

igomit [66]

<h3>Answer: 78.6</h3>

Work Shown:

$\begin{array}{|c|c|} \cline{1-2}\text{Number of People} & \text{Score}\\\cline{1-2}9 & 90\\\cline{1-2}18 & 80\\\cline{1-2}15 & 70\\\cline{1-2}\end{array}$

Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.

$\begin{array}{|c|c|c|} \cline{1-3}\text{Number of People} & \text{Score} & \text{Number*Score}\\\cline{1-3}9 & 90 & 810\\\cline{1-3}18 & 80 & 1440\\\cline{1-3}15 & 70 & 1050\\\cline{1-3}\end{array}$

The values in the third column add to 810+1440+1050 = 3300

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The mean is 3300/42 =78.571 approximately which rounds to 78.6

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2 years ago

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Vlad1618 [11]

A) 15% of $32.00 is $4.80.
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3 years ago

If there are 25 students in a class in which 5 of the 11 guys wear glasses and 6 out of the 14 girls wear glasses- what is the p

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Answer:

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Step-by-step explanation:

3 0

3 years ago

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7 0

2 years ago

Read 2 more answers

Rampur Sarpanch requested one of his villager to donate a 6m wide land adjusted to his 132.8m long side of his right triangular

Furkat [3]

Answer:

The answer is 3030.72 m³

Step-by-step explanation:

Please refer to attached file for graphical representation.

Formulas used:

Area = (a*b)/2

Trigonometry: Tan (t) = opposite/adjacent

Assume:

Villager plot has 3 sides: hypotenuse=C, adjacent=A, opposite=B

Plot given has 3 sides: hypotenuse=z, adjacent=y, opposite=x

Angle common between them is t.

Step 1:

For t:

Tan (t) = a/b

Tan (t) = 123/50

Tan (t) = 2.46

Step 2:

For y:

Tan (t) = y/x

2.46 = y/6

y = 2.46*6

y = 14.76

Step 3:

Villagers old plot area: B = (a*b)/2 = (123*50)/2

B = 3075 m³

Step 4:

Plot donated area: C = (x*y)/2 = (6*14.76)/2

C = 44.28 m³

Step 5:

Villager remaining plot:

A = B-C

A= 3075-44.28

A = 3030.72 m³

Download docx

7 0

3 years ago