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3 years ago

______are used to represent an unknown quantity in a mathematical expression.

Mathematics

1 answer:

Ronch [10]3 years ago

7 0

Answer:

<u>Variables</u> are used to represent an unknown quantity in a mathematical expression.

Step-by-step explanation:

Variables are used to represent an unknown quantity in a mathematical expression.
For example : x + 2 = 4, here x is the variable.
We can denote variable by any alphabet i.e, a,b,c,d etc.

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If sales tax in a specific county is 6.5% what is the total price paid on a purchase of $156.00

olasank [31]

Then, it would be 156 + 156*6.5 /100 = 156+10.14 = $166.14

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3 years ago

In a class there are 15 students. 8 of them like playing soccer, 6 of them like swimming, and 2 like both and swimming and playi

xenn [34]

Answer:

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3 years ago

Priya has a recipe for banana bread. She uses 7 1/2 cups of flour to make 3 loaves of banana bread. Andre will follow the same r

DochEvi [55]

9514 1404 393

Answer:

A. b = 2/5f

Step-by-step explanation:

Andre's equation is in the form ...

b = kf

The value of k can be found by dividing by f:

b/f = k

For Priya's recipe, the values are ...

b/f = k = 3/7.5 = 2/5

Andre's equation is ...

$\boxed{b=\dfrac{2}{5}f}$

4 0

3 years ago

3y - 5x = 9<br> Y= -5/3x-12<br> Are the parallel

bija089 [108]

Answer:

Both lines are not parallel

Step-by-step explanation:

Given as :

Two lines equation are as :

3y - 5x = 9 And y = - $\frac{5}{3}$ x - 12

First line is now written in eq y = mx + c

Or, 3y = 5x + 9

Or, y = $\frac{5}{3}$ x + $\frac{9}{3}$

So, Slop of this line ( m 1 ) = $\frac{5}{3}$

slop of second line ( m 2) is $\frac{- 5}{3}$

∵ The slop of both lines are not equal , so the line are not parallel to each other .

Hence Both lines are not parallel Answer

6 0

3 years ago

Find the original price of a pair of shoes that was discounted 20% and now sell for $54

Tresset [83]

Original price = x

The original price of a pair of shoes was discounted 20%.

20% = 20/100 = 0.2

1 - 0.2 = 0.8

x * 0.8

Now they sell for $54.

x * 0.8 = 54

Solve to find x.

54 / 0.8 = x

x = 67.5

Convert that to currency.

7 0

3 years ago