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shepuryov [24]
3 years ago
12

How do you subtract rational expressions without a common denominator?

Mathematics
1 answer:
zubka84 [21]3 years ago
4 0
You would have to make common denominators
consider a/b,c/d in Q
then a/b - c/d = ad/db - cb/bd = (ad-cb)/db for all a,b,c,d in R, exclude b,d=0
i.e. 1/2 - 1/4
=4/8 - 2/8 =(4-2)/8=2/8 =1/4
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Which statements are true about the linear inequality y > 3/4x – 2?
skad [1K]
The slope of the line is .75, so 1. is false.

The graph is a dashed line AND the area above it shaded, so 2. is false (in and of itself)

The graph is the area shaded above the line not below it, so 3. is false.

0>.75(0)-2, 0>-2 so 4. is TRUE

The line is dashed and is not part of the solution to the inequality, so the point (0,-2) while on the line, is not part of the solution set and thus is not part of the graph, and does not intercept the graph, so 5. false.  (the line intercepts the y axis at (0, -2) but the line itself is not part of the solution set and thus is not part of the graph)

So only statement 4. is true.
7 0
3 years ago
The running trail in the local park is 3.416 miles long. If the park board were planning to extend the trail by 1.34 miles, what
morpeh [17]

Answer:

4.756 miles

Step-by-step explanation:

It is given that,

The running trail in the local park is 3.416 miles long. If the park board were planning to extend the trail by 1.34 miles.

We need to find the new length of the running trial. It is equal to the sum of length of running trail and the extended length. So,

l = 3.416 +1.34

l = 4.756 miles

So, the new length of the running trail be 4.756 miles

7 0
3 years ago
Cally wants to coat her driveway with a winter sealer. Her driveway is 18 feet long and shaped like a trapezoid. At the garage d
stellarik [79]

Answer:

Amount of Winter sealer for 2 coats[in square feet] = 576 square feet

Step-by-step explanation:

Given:

Length of drive way at garage door = 12 feet

Length of drive way at street = 20 feet

Length of total driveway = 18 feet

Find:

Amount of Winter sealer for 2 coats[in square feet]

Computation:

Amount of Winter sealer for 2 coats[in square feet] = 2[Area of trapezoid]

Amount of Winter sealer for 2 coats[in square feet] = 2[(1/2)(Sum of parallel side)(Height)]

Amount of Winter sealer for 2 coats[in square feet] = 2[(1/2)(12 + 20)(18)]

Amount of Winter sealer for 2 coats[in square feet] = 2[(1/2)(32)(18)]

Amount of Winter sealer for 2 coats[in square feet] = 32 x 18

Amount of Winter sealer for 2 coats[in square feet] = 576 square feet

5 0
2 years ago
Which of these is the algebraic expression for "4 times the sum of 2 and y?"
Volgvan

Answer:

4(2 + y)

Step-by-step explanation:

"4 times the sum of 2 and y".

<h3>Hope it is helpful...</h3>
5 0
3 years ago
Read 2 more answers
Help me please. mad confused lol
SCORPION-xisa [38]

Answer:

P = 30 degrees, PQ = 6.93, PN = 8

Step-by-step explanation:

For the angle, just subtract the angles you already know from 180, so 180 - 90 - 60= P. P = 30 degrees.

For PQ, use tan60 = x/4, or 4tan(60), which equals 6.93.

For PN, use cos60 = 4/x, or 4/cos60, which equals 8.

Hopefully this helps- let me know if you have any questions!

7 0
3 years ago
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