All categories

2 years ago

What variable expression represents the phrase "the difference of twice a number and 3"?

Mathematics

2 answers:

just olya [345]2 years ago

6 0

B I believe not entirely possitive

Vlada [557]2 years ago

3 0

C. because x represents "a number" it reads, "the difference..." and difference means subtracting. Also how would you write twice a number? 2n, it basically means a number times two. But that's not all. You still have to subtract by 3 so its 2n-3.

You might be interested in

A fair coin is tossed 20 times. The probability of getting the three or more heads in a row is 0.7870 and the probability of get

adelina 88 [10]

Answer:

The value is $P( H \ n \ T ) = 0.6049$

Step-by-step explanation:

From the question we are told that

The number of times is n = 20

The probability of getting three or more heads in a row is $P(H) = 0.7870$

The probability of getting three or more heads in a row or three or more tails in a row is $P(H \ u \ T ) = 0.9791$

Generally given that it is a fair coin , then $P(H) = P(T) = 0.7870$

Here P(T) is probability of getting three or more tails in a row

Generally the probability of getting three or more heads in a row and three or more tails in a row is mathematically represented as

$P( H \ n \ T ) = P(H) + P(T) - P( H \ u \ T )$

=> $P( H \ n \ T ) = 0.7870 + 0.7870 - 0.9791$

=> $P( H \ n \ T ) = 0.6049$

7 0

2 years ago

A scale factor of less than one means

podryga [215]

Answer:

The sides get smaller

Step-by-step explanation:

Because anything times 1 gets smaller and it's no different for scale factor

8 0

2 years ago

Read 2 more answers

Solve for x and why please using these!!!

krok68 [10]

Answer:

$x = 40$

$y = 5$

Step-by-step explanation:

$4x = 2x+80\\2x = 80\\x = 40$

Edit: Solve for Y

A straight line is 180 degrees so one side (the x side) is 160°, The Y side is 20, and you can work backwards by -

$8y - 20 = 20\\8y = 40\\y = 5$

4 0

2 years ago

marissa claims she makes 15 calls per night at an average of 6 minutes per call. one evening, her parents kept track of each cal

emmainna [20.7K]

Marissa's claim was accurate. the average of these minute counts is 6 minutes, which is what Marissa claimed.

6 0

2 years ago

Tomas has a garden with a length of 2.45 meters and a width of 5/8 meters. Use benchmarks to estimate the area and perimeter of

Alchen [17]

Answer: The area is 1 1/4. The perimeter is 6.

Step-by-step explanation: 2.45 is about 2.5. 5/8 is about 1/2. To find the area we need to multiply length times width. 2.5 is 2 and 1/2 which is 5/2. 5/2 times 1/2 is 5/4. To simplify it divide 5 by 4 which is 1 with remainder 1. 5/4 is 1 1/4. Therefore the area is 1 1/4 meters squared. To find the perimeter we have to add length + length + width + width. . 2.5 is the same thing as 2 1/2. 5/8 is about 1/2 if we use benchmarks. 2 1/2 + 2 1/2 + + 1/2 + 1/2 is 6. The perimeter is 6.

5 0

2 years ago

Read 2 more answers