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JulsSmile [24]
3 years ago
13

A letter or symbol that is used to represent a number is called a

Mathematics
2 answers:
Julli [10]3 years ago
6 0

Answer: A variable is a letter or symbol that is used to represent a number in math.



myrzilka [38]3 years ago
4 0

Answer:

<u>Variable</u>

Any letter that corresponds to a number is known as a variable


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Sonny's gymnastics class last one hour and 20 minutes the class starts at 3:50 p.m. at what time does the gymnastics class in
Ilya [14]
4:10 is the time that the class ends, I think that's what you meant?
7 0
3 years ago
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A car is moving with a velocity (3.0 m/s) x̂ + (1.0 m/s) ŷ and 3.0 seconds later its velocity is (6.0 m/s) x̂ - (3.0 m/s) ŷ. Wha
Mars2501 [29]

Here we know that the initial velocity of the car is given by:

V_i=(3.0\hat x+1.0\hat y)m/s

And the final velocity of the car is given by:

V_f=(6.0\hat x-3.0\hat y)m/s

It took 3 seconds to attain the final velocity, so we have t=3 s

Therefore, the acceleration can be obtained by:

V_f-V_i=a\times t

a=\frac{V_f-V_i}{t}

Plugging the values of the initial, final velocity and the time, we get:

a= \frac{(6\hat x-3\hat y)-(3 \hat x+1 \hat y)}{3} =\frac{6\hat x-3 \hat y -3 \hat x-1 \hat y}{3} =\frac{3 \hat x-4 \hat y}{3}

So the acceleration of the car is given by:

a=\frac{3 \hat x}{3} -\frac{4 \hat y}{3} =1 \hat x- \frac{4}{3} \hat y

Now we need to find the direction of the average acceleration of the car:

\theta=tan^{-1} \frac{y}{x}

Here, x and y are the coefficients of the 'x' and 'y' components of the vector:

\theta=tan^{-1}(\frac{-\frac{4}{3} }{1} )=tan^{-1}(\frac{-4}{3}) =-53.13^\circ

Therefore, the direction of the average acceleration of the car is -53.13^\circ.

8 0
3 years ago
A recipe that serves 10 uses 5 teaspoons of molasses. How many teaspoons are needed to serve 6?
Lady bird [3.3K]

Answer:

3 teaspoons.

Step-by-step explanation:

I am going to do this by figuring out how many teaspoons of molasses is need to serve 2 and then multiply that number by 3. because 3 x 2 = 6.

10 divided by 5 is 2.  5 divided by 5 equals 1. This means that to feed 2 people you need 1 teaspoon of molasses.

1 tsp + 1 tsp + 1 tsp = 3 tsp.

This means that I need 3 tsp of molasses to feed 6 people.

4 0
3 years ago
The expression 53 ( 1 − x) gives the discounted price of a pair of shoes, where x is the percent of the discount written in deci
prisoha [69]

Answer: Option "A" is correct.

Step-by-step explanation:

Since we have given that

53(1-x) represents the discounted price of a pair of shoes , where x is the percent of the discount written in decimal form.

So,

(1-x) represents the percent of original price being paid as we know that if percentage is given in decimal form then to get the percent of  original price being paid  we subtract it from 1.

For example:

Suppose 20% is the percent of discount on market price then the selling price will be 80% of marked price.

In the above example, we subtract it from 100% to get the remaining price  he is receiving at.

If we have 0.2 as discount then the selling price will be 0.8 of marked price i.e. we get 0.8 which tells us the original price is being paid.


8 0
3 years ago
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