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3 years ago

(x − 3)(2x2 − 5x + 1)

Mathematics

1 answer:

Ira Lisetskai [31]3 years ago

7 0

Answer:

2x3 − 11x2 + 16x − 3

Step-by-step explanation:

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Please help meeee!!!!!!!!!!!!!!

Sindrei [870]

Answer:

Step-by-step explanation:

6 0

3 years ago

A math club took a math test. Twelve of the members had an average score of 80. Eighteen of the members had an average score of

Radda [10]

12 x 80 = 960

18 x 86 = 1548

960 + 1548 = 2508

12 + 18 = 30

2508/30 = 83.6

The class average is 83.6

5 0

4 years ago

Read 2 more answers

Please help me on number 4

Semmy [17]

Answer:

143degrees

Step-by-step explanation:

sum of angles of a triangle =180degrees

let the third unknown angle be x

99+37+x=180

136+x=180

x=180-136

x=44

the sum of two opposite interior angles is equal to the exterior angle

44+99=<PQR

<PQR=143 degrees.

the sum of angles on a straight line is 180 degrees

<PQR+37=180

<PQR=180-37

<PQR=143

7 0

3 years ago

Your teacher is giving a test worth 250 points. There are 68 questions. Some questions are worth 5 points and the rest are worth

NARA [144]

There are 38 five point questions and 30 two points questions.

Step-by-step explanation:

Given,

Worth of points in test = 250

Number of questions = 68

Let,

x represent the number of 5 points questions

y represent the number of 2 points question

According to given statement;

x+y=68 Eqn 1

5x+2y=250 Eqn 2

Multiplying Eqn 1 by 2

$2(x+y=68)\\2x+2y=136\ \ \ Eqn\ 3$

Subtracting Eqn 3 from Eqn 2

$(5x+2y)-(2x+2y)=250-136\\5x+2y-2x-2y=114\\3x=114$

Dividing both sides by 3

$\frac{3x}{3}=\frac{114}{3}\\x=38$

Putting x=38 in Eqn 1

$38+y=68\\y=68-38\\y=30$

There are 38 five point questions and 30 two points questions.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

8 0

3 years ago

Katy and Jane construct a four-sided wall to surround their castle. The wall has a perimeter of

PilotLPTM [1.2K]

Answer:

The correct length is 34 feet.

Step-by-step explanation:

Let us assume that the wall created is a rectangle ABCD as shown in the attached image.

We know that opposite sides of a rectangle are equal.

Perimeter of a closed figure is calculated by adding all the sides of the figure.

Here, from the figure, the perimeter is : AB + BC + CD + DA

AB and CD are equal to length.

BC and DA are equal to width.

So,

$Perimeter = 2 \times (length + width) ....... (1)$

Here, we are given that perimeter is 100 feet and width = 16 feet

Putting values in equation (1):

$100 = 2 \times (16 + length)\\\Rightarrow 50 = 16 + length \\\Rightarrow length = 34 feet$

Hence, length is 34 feet.

5 0

4 years ago