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Umnica [9.8K]
3 years ago
12

Why do we need a common denominator

Mathematics
2 answers:
Zanzabum3 years ago
8 0
If u do not have a comon den. that it will be confusing and u will not come up with the right answer 
KengaRu [80]3 years ago
4 0
Finding a common denominator<span> makes it possible to add two fractions because it allows us to </span>write each<span> fraction as a multiple of a </span>common<span> (usually smaller) fraction. Subtracting fractions works the same way; find a </span>common denominator<span> so that the fractions involved are in the same terms.
<span>
</span>[ Source: </span><span>www.mathmistakes.info/facts/AlgebraFacts/learn/fr/add.html ]</span>

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Can a triangle be formed with sides 18, 20, 2? If so, classify it by angles..
Nady [450]

Answer:

No, it cannot make a triangle

7 0
2 years ago
What is the inverse operation for addition?
Naddik [55]
1. SUBTRACTION

inverse means opposite. The opposite of addition is SUBTRACTION.

2. 4.25x + 7 = 24

a) 4

b) 2.125

c) 7

d) 20

All these values (as shown above) are what x is like when added up together. The first one (a) is correct. The others are wrong.

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3 0
3 years ago
A ball is thrown into the air with an upward velocity of 36 ft/s. It’s height h in feet after t seconds is given by the function
777dan777 [17]

Answer:

Time taken for the ball to hit the ground back = 3.08 s

Step-by-step explanation:

h(t)= -16t² + 48t + 4

when will rhe object come back to hit rhe ground?

When the ball is at the level.of the ground, h(t) = 0.

0 = -16t² + 48t + 4

-16t² + 48t + 4 = 0

Solving the quadratic equation

t = 3.08 s or t = -0.08 s

Since the time cannot be negative,

Time taken for the ball to hit the ground back = 3.08 s

Hope this Helps!!!

Step-by-step explanation:

8 0
3 years ago
Show how to multiply 9 x 475 using expanded form and the distributive property
frutty [35]
9 x 400 + 9 x 70 + 9 x 5. (9 x 470) + (9 x 5).
3 0
3 years ago
Malaya is standing directly between a 90-foot tall courthouse and a 54-foot tall bank. If the angle of elevation from the point
Alex

Answer:

Step-by-step explanation:

Draw a picture.

c and b are Malaya’s distance from the courthouse and bank, respectively.

tan(72°) = c/90

c = 90tan(72°)

tan(35°) = b/54

b = 54tan(35°)

Distance between courthouse and bank = c+b

= 90tan(72°) + 54tan(35°)

= 301.5 ft

3 0
2 years ago
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