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slava [35]
3 years ago
8

Suppose there are 20 questions on a multiple choice test.if 25% of the answers are choice B how many of the answers are not choi

ce B
Mathematics
1 answer:
victus00 [196]3 years ago
4 0

Answer:

15

Step-by-step explanation:

25% of 20 is 5 5*3=15

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PLEASE SHOW YOUR WORK.
schepotkina [342]

Answer:

a) Shawn's error was that he Multiplied 15 by 2x only. He didn't Multiply 15 by 7

b) The difference, in square feet, between the actual area of Shawn’s garden and the area found using his expression is given as

98 square feet

Step-by-step explanation:

The area in, square feet, of Shawn’s garden is found be calculating 15(2x + 7). Shawn incorrectly says the area can also be found using the expression 30x + 7.

The correct area =

15(2x + 7).

= 30x + 105 square feet

The error in Shawn’s expression is

= 15(2x + 7)

= 30x + 7 square feet

Shawn's error was that he Multiplied 15 by 2x only. He didn't Multiply 15 by 7

The difference, in square feet, between the actual area of Shawn’s garden and the area found using his expression is given as

30x + 105 square feet - 30x + 7 square feet

= 30x + 105 - (30x + 7)

= 30x - 30x + 105 - 7

= 98 square feet

7 0
2 years ago
A barbecue grill is a circle with a diameter of 2.2 feet. What is the circumference of the grill (in feet)? (R
Mars2501 [29]

Step-by-step explanation:

circumference =pi × diameter

=(22/7)×2.2

=6.914ft

8 0
2 years ago
Read 2 more answers
Write 0.000739 in scientific notation.
jek_recluse [69]

Answer:

7.39 × 10-4^-4

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Translate the statement below into a mathematical expression:
slega [8]

Answer:

18-6=2+y

Step-by-step explanation:

18-6=2+y

5 0
3 years ago
What is the center of the circle x² + y2 - 16 = 0?
Ad libitum [116K]

Answer:

(0,0)

Step-by-step explanation:

x^2+y^2=4^2

center: (0,0)

radius=4

7 0
3 years ago
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