MATHEMATICS MIDDLE SCHOOL

Here are the scores that Jenna has received on her seven quizzes what is the upper quartile

Answers

Answer 1

Answer: The upper quartile is 18

Answer 2

Answer:

The answer for the upper quartile is 18

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Step-by-step explanation:

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Describe a situation where it is easier to use decimals than fractions

Answers

when you are ading or subtracting. it is a lot easier to do it in decimal form

A person draws a map showing the amount of silt left by the flooding of the Nile River. What type of social science does this most directly describe? A. Geography
B. Archaeology
C. Economics
D. Political Science

Answers

Answer:

Geography.

Step-by-step explanation:

Geographers use many tools in their work. Maps, globes, photos, satellite images, and models are all tools that geographers might use. Geographers who study ancient Egypt might want to know how the people used the Nile River. For example, the Nile is known to flood. Geographers might study how people dealt with flooding. They might also want to know if or how they used floods to help them.

Not owned by me.

Answer: A. Geography

Step-by-step explanation:

Widget Wonders produces widgets. They have found that the cost, c(x), of making x widgets is a quadratic function in terms of x.The company also discovered that it costs $29 to produce 2 widgets, $115 to produce 4 widgets, and $757 to produce 10 widgets.

How much does it cost to make 3 widgets?

Answers

Answer:

The total cost to make 3 widgets is $64.

Step-by-step explanation:

As cost is give by quadratic function such as $c(x) = ax^2 + bx + d$

As it costs $29 to produce 2 widgets. So,

$c(2) = a(2)^2 + b(2) + d$

$29= 4a+2b+d ....[A]$

As it costs $115 to produce 4 widgets. So,

$c(4) = a(4)^2 + b(4) + d$

$115= 16a+4b+d ....[B]$

As it costs $757 to produce 10 widgets. So,

$c(10) = a(10)^2 + b(10) + d$

$757= 100a+10b+d ....[C]$

In order to find the values of a, b, c and d, we have to equations [A], [B] and [C]

Subtracting Equation [A] from [B] and [B] from [C]

12a + 2b = 86 ........[D]

84a + 6b = 642 ........[E]

Multiplying Equation [D] by 3 and subtracting from [E]

84a + 6b + 3(12a + 2b) = 642 - 86

48a = 384

a = 8

Putting value of a = 8 in equation [D]

12(8) + 2b = 86

96 + 2b = 86

2b = -10

b = -5

Substituting the value of a = 8 and b = -5 in Equation [A].

29= 4a+2b+d

29 = 4(8) + 2(-5) + d

29 = 32 - 10 + d

d = 29 + 10 - 32

d = 7

The required form of equation can be obtained by substituting a = 8, b = -5 and d = 7 in the cost equation. So,

$c(x) = 8x^2 - 5x + 7$ is the required form of equation.

Therefore, the total cost to make 3 widgets will be:

Putting x = 3 in $c(x) = 8x^2 - 5x + 7$

$c(3) = 8(3)^2 - 5(3) + 7$

$c(3) = 72 - 15 + 7$

$c(3) = 64$

Hence, the total cost to make 3 widgets is $64.

Keywords: quadratic equation, cost

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Solve 2/3 x d = 10/9

Answers

Answer:

Exact Form:

d=5/3

Decimal Form:

d=1. 6

Mixed Number Form:

d=1 2/3

Sue bought 7 cans of tennis balls. There are 3 balls in each can. How many balls did Sue buy?

Answers

Answer:

Sue buy 21 balls.

Answer:

Step-by-step explanation:

7 cans times 3 balls each equals 21 balls

Please help 5. 6. 7. 8.

Answers

5. Angle 5 would be 160° because it is corresponding to Angle 1.
6. Angle 4 would be 37° because it is vertical to Angle 6.
8. Angle 5 would either be 60° because it is congruent to Angle 4 or 120° because it’s supplementary to Angle 4. I don’t remember.
I forgot how to do question 7.

Answer:

thi is 4 por que tiene correcto los numeros

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