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3 years ago

In November, Mr. Lee’s students read 50 books. In December, they read 40 books.

Mathematics

1 answer:

Harrizon [31]3 years ago

7 0

Answer:

20% decrease

Step-by-step explanation:

Start by dividing 40 by 50.

40/50 = 0.8

0.8 is the decimal form of 80%. So now we know that 40 is 80% of 50. This means that the remaining 20% is the difference between the books read in November and December.

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ASAP ! The radius of a circle is 5 inches. What is the length of a 70° arc?

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Answer:

7.29 inches

Step-by-step explanation:

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3 years ago

In a geometric sequence, the first term is 3 and the common ratio is 2. What is the sum of the first 9 terms?

Solnce55 [7]

Step-by-step explanation:

99 is the answer........

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3 years ago

Annabeth has $29.00 to spend at the sporting goods store. She buys a T-shirt that costs $15.32. She also wants to buy a soccer b

Gekata [30.6K]

Answer:

The most expensive she can buy is the soccerball

Step-by-step explanation:

Given

$Total =\$29.00$

$T\ Shirt = \$15.32$

$Soccer\ Ball= \$12.87$

$Baseball\ Cap = \$8.39$

$Shin\ Guards = \$14.98$

$Water\ Bottle = \$5.93$

Required

Using $\$15.32 + c = \$29.00$ , what is the most expensive she can buy?

$\$15.32 + c = \$29.00$

Subtract $15.32 from both sides

$\$15.32 - \$15.32 + c = \$29.00 - \$15.32$

$\$15.32 - \$15.32 + c = \$13.68$

$c = \$13.68$

This means that she can not afford items that cost more than $13.68

i.e. the shin guards which costs $14.98

The items she can afford and their prices are:

$Soccer\ Ball= \$12.87$

$Baseball\ Cap = \$8.39$

$Water\ Bottle = \$5.93$

The most expensive of them all is:

$Soccer\ Ball= \$12.87$

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3 years ago

How many possible solutions are there to a linear equation in one variable?

lubasha [3.4K]

<span>Depending on the equation there can be three possible cases: 1- There can be 1 specific solution for the variable: 2x+4= 3 where x= -1/2 2- there can be an infinite amount of solutions: 2x+x-2=3x-3+1 where x=x 3- there can be no answer: 3+2x-x=5-3x+4x where the solution doesn't exist</span>

5 0

3 years ago

Alexandra scored 40 on an exam, receiving 3 points for each right answer and losing 1 point for each wrong answer. Had 4 points

vagabundo [1.1K]

Answer: there were 20 questions in the exam.

Step-by-step explanation:

Let x represent the number of right answers.

Let y represent the number of wrong answers.

Alexandra scored 40 on an exam, receiving 3 points for each right answer and losing 1 point for each wrong answer. It means that

3x - y = 40- - - - - - - - - - 1

Had 4 points been given for each right answer and 2 points deducted for each wrong answer, Alexandra would have scored 50. It means that

4x - 2y = 50- - - - - - - - - - -2

Multiplying equation 1 by 2 and equation 2 by 1, it becomes

6x - 2y = 80

4x - 2y = 50

Subtracting both equations, it becomes

2x = 30

x = 30/2

x = 15

Substituting x = 15 into equation 1, it becomes

3 × 15 - y = 40

45 - y = 40

y = 45 - 40

y = 5

The number of questions in the exam is

x + y = 15 + 5 = 20

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3 years ago