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Paladinen [302]
3 years ago
9

What is the first step when adding or subtracting rational expressions with unlike denominators?

Mathematics
1 answer:
mihalych1998 [28]3 years ago
6 0
Find the least common denominator
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Noah has $50. He wants to buy a cell phone case for $20 and some accessories. Each accessory costs $8. How many accessories (x)
levacccp [35]

Answer:

Noah can buy 2 accessories.

Step-by-step explanation:

Given:

Money Noah has = $50

Cost of Cell phone case = $20

Cost of each accessory =$8

Amount he wants to be left = $8

So Total Amount he he wants to spend on accessories and Cell phone case will be equal to Money Noah has minus Amount he wants to be left.

framing in equation form we get;

Total Amount he he wants to spend on accessories and Cell phone case = \$50-\$8 =\$42

No we need to find the number of accessories Noah can buy.

Let the number of accessories be 'x'.

Now we can say that;

Cost of Cell phone case plus Cost of each accessory multiplied by number of accessories should be less than or equal to Total Amount he he wants to spend on accessories and Cell phone case.

framing in equation form we get;

20+8x\leq 42

Subtracting both side by 20 we get using Subtraction property of Inequality.

20+8x-20\leq 42-20\\\\8x\leq 22

Now Dividing both side by 8 using Division property of Inequality we get;

\frac{8x}{8}\leq \frac{22}{8}\\\\x\leq 2.75

Now rounding to whole number we get ;

x\leq 2

Hence Noah can buy 2 accessories.

8 0
3 years ago
Which equation can be used to represent "six added to twice the sum of a number and four is equal to one-half of the
butalik [34]

Answer:

A- 6 + 2(x + 4) = 1/2(3-x)

Step-by-step explanation:

4 0
3 years ago
The polygons below are similar, but not drawn to scale. find the value of x
gulaghasi [49]

Answer:

x=21

Step-by-step explanation:

Set the two similar sides in a fraction to be compared and set them equal to another set of similar sides whose values are already known. Solve from there. See work for more.

8 0
3 years ago
when 5 is subtracted from a certain number and the result divided by 6 the answer is equal to 4 .find the number
dangina [55]

Answer:

(x - 5) / 6 = 4

x - 5 = 24

x = 29

The Number is 29.

3 0
4 years ago
How do i answer a • a • a • r • r using exponents
Maru [420]

Answer:

a^3 +r^2

Step-by-step explanation:

a is multiplied three times so it goes to a^3

r is multiplied twice so it goes to r^2

4 0
4 years ago
Read 2 more answers
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