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2 years ago

5) PLEASE HELP WITH QUESTION. MARKING BRAINLIEST + POINTS GIVEN.

Mathematics

1 answer:

aev [14]2 years ago

5 0

Hello xD

I finally got this one right!

There is a formula to use in order to solve this thing, so find your notebook xD

The correct answer is option B

I really wish you the best and I'll keep trying my best to help you out!

You might be interested in

(3/4)3 write as improper fraction and mixed number

matrenka [14]

15/4, 3 3/4, and 3.75

5 0

3 years ago

If the operation is defined for all integers a and b by <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail=

leva [86]

Answer:

(E) I, II and III

Step-by-step explanation:

Given,

[email protected] = a + b - ab ∀ a, b ∈ Z ( set of all integers ),

For solving this question we need to remember the following properties of integers:

Commutative property of addition
Additive identity property of addition
Commutative property of multiplication
Distributive property of multiplication over addition

I. [email protected] = a + b - ab,

[email protected] = b + a - ba = a + b - ab

Thus, [email protected] = [email protected]

II. [email protected] = a + 0 - a × 0

= a + 0 - 0

= a

III. ([email protected])@c = ([email protected])+c - ([email protected])c

= (a + b - ab) + c - (a + b - ab)c

= a + b - ab + c - ac - bc + abc

= a + b + c - ab - bc - ac + abc,

Now, [email protected]([email protected]) = [email protected]( b + c - bc )

= a + (b + c - bc) - a(b+c - bc)

= a + b + c - bc - ab - ac + abc

= a + b + c - ab - bc - ac + abc.

Thus, ([email protected])@c = [email protected]([email protected])

6 0

2 years ago

In the accompanying figure, chords AB and CD of circle O intersect at E. If m AD=100 and m CB=70, what is m AED?

vfiekz [6]

Answer:

Step-by-step explanation:

Find the average of 100 and 70 which is 100 + 70 = 170/2 = 85

7 0

2 years ago

What is the mass of a baseball that has a kinetic energy of 100 J and is traveling at 5 m/s?

Andrei [34K]

The formula of the kinetic energy is:
K.E = $\frac{1}{2}$ mv²

The given are
K.E = 100 J
v = 5 m/s

Plug them in:

100 = $\frac{1}{2}$ m × (5)²
100 = $\frac{1}{2}$ m × 25
100 = 12.5m
Divide by 12.5 on either sides to isolate m

$\frac{100}{12.5}$ = $\frac{12.5m}{12.5}$
12.5 and 12.5 cancels out
8 kg = m
The mass of the baseball that has a kinetic energy of 100 J and speed of 5 m/s is 8 kg

4 0

3 years ago

Read 2 more answers

A train travels 430 miles in 5 hours at a constant speed. If its speed remains the same, how long will it take to travel the rem

Taya2010 [7]

Answer:

2.5 hours

Step-by-step explanation:

To get the hourly speed, we need to divide 430 by 5.

This means that the train is going at a speed of 86 miles/hour.

Since we need to find the hour, we need to divide 215 miles by 86 miles/hour.

$215 miles / \frac{86 miles}{hour}$