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wel
3 years ago
12

What is3/4 - 1/2 and what is 7/8-2/3

Mathematics
1 answer:
Mariulka [41]3 years ago
7 0
3/4 - 1/2 = 3/4 - 2/4 = 1/4

7/8 - 2/3 = 21/24 - 16/24 = 5/24
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Trying to see what my answer would be
Oksanka [162]

Answer:

B. 2^{-14}*5^{10}.

Step-by-step explanation:

Use the power of a power property.

(2^{-7}*5^{5} )^{2}

Multiply all the exponents in the parenthesis by 2.

(2^{-7}*5^{5} )^{2}=(2^{-14}*5^{10} )

The answer is B. 2^{-14}*5^{10}.

Hope this helps!

7 0
2 years ago
in a recent semester at a local university 520 students enrolled in both general chemistry and calculus 1. Of these students 88
IceJOKER [234]

Let Ch and C denote the events of a student receiving an A in <u>ch</u>emistry or <u>c</u>alculus, respectively. We're given that

P(Ch) = 88/520

P(C) = 76/520

P(Ch and C) = 31/520

and we want to find P(Ch or C).

Using the inclusion/exclusion principle, we have

P(Ch or C) = P(Ch) + P(C) - P(Ch and C)

P(Ch or C) = 88/520 + 76/520 - 31/520

P(Ch or C) = 133/520

6 0
3 years ago
Values of x in the equation 10x^2-64=36+6x^2
NISA [10]
10x^2-6x^2 = 4x^2
-64-36 = 100
4x^2 -100 = 0
(2x -10)(2x+10)
X = 2/10 and x = - 2/10
5 0
3 years ago
Jeff and Kirk can build a​ 75-ft retaining wall together in 4 hours. Because Jeff has more​ experience, he could build the wall
oee [108]

It will take Kirk about 8 hours 32 minutes to build the wall by himself.

<h3>What is Quadratic Polynomial?</h3>

Quadratic equations are second-degree algebraic expressions and are of the form ax² + bx + c = 0.

Here, Let k represent Kirk's time (in hours) to build the wall by himself. Then (k-1) is the time it takes for Jeff to build it. Their working-together rate in "walls per hour" is ...

 1/k +1/(k -1) = 1/4

Multiplying by 4k(k-1), we have ...

 4(k-1) +4k = k(k -1)

 k² -9k = -4 . . . . . . . . subtract 8k and simplify

 k² -9k +20.25 = 16.25 . . . . . add (9/2)² to complete the square

 k -4.5 = √16.25 . . . . . . . . . take the square root

 k = 4.5 +√16.25 ≈ 8.531129 . . . hours

The fractional hour is ...

 0.531129 × 60 min ≈ 31.9 min ≈ 32 min

Thus, It will take Kirk about 8 hours 32 minutes to build the wall by himself.

Learn more about Quadratic Polynomial from:

brainly.com/question/2350120

#SPJ1

8 0
2 years ago
Read 2 more answers
Find the percent change from 10 yards to 13 yards
joja [24]
The percentage change is 20
5 0
3 years ago
Read 2 more answers
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