When adding or subtracting fractions with like denominators , does the denominator change ?

Mathematics

1 answer:

mrs_skeptik [129]4 years ago

3 0

Answer:

No, the denominator doesn't change when adding or subtracting fractions.

Step-by-step explanation:

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Six times the difference of a number and three is equal to three less than the number.

icang [17]

Answer:

x=3

Step-by-step explanation:

lets take x as the number

6(x-3)=x-3

since it says "6 times" we know that we will have to multiply the difference by 6 and it says the difference of a number and 3 is equal to 3 less than the number so we know that we are subtracting 3 from x

6x-18=x-3

6x-x=18-3

5x=15

x=3

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3 years ago

The regular price for a snowboard is $299.95. It is on sale for 30% off, but 5% sales tax will be applied to the sale price. Cai

rjkz [21]

So, ($299.95)(. 30) = $89.99
$299.95 - $89.99= $209.96
($209.96)(.05)=$10.50
$209.96 + $10.50 = $220.46
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4 years ago

Brenda's school is selling tickets to a spring musical. On the first day of ticket sales the school sold 3 senior citizen ticket

Feliz [49]

We can form two equations, let the price of a senior ticket be s and the price of a child ticket be c.
We have from day 1:
A: 3s + 9c = 75
And from day 2:
B: 8s + 5c = 67

Now we can rewrite A as:
A: 24s + 72c = 600
And can rewrite B as:
B: 24s + 15c = 201

Now A-B can be written as:
A-B: 57c = 399

So c = 7

Now substituting this back into A we get:
A: 3s + 63 = 75
A: 3s = 12

So s = 4

We have the price of a senior ticket is $4 and the price of a child ticket is $7

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3 years ago

Rewrite as a quotient of two base - 9 logarithms. write your answer in simplest form log 17 =<br>

4vir4ik [10]

Answer:

$\frac{log_{9}17 }{log_{9}10 }$