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Oliga [24]
4 years ago
14

Find the product mentally.

Mathematics
2 answers:
algol134 years ago
8 0
The answer should be z2-144
morpeh [17]4 years ago
5 0

Answer:

z^2-144

Step-by-step explanation:

Here the given expression,

(z-12)(z+12)

∵ By using the algebraic property,

(a+b)(a-b)=a^2-b^2

We get,

(z-12)(z+12)=(z)^2 - (12)^2

\implies (z-12)(z+12)=z^2-144

Which is the required product.

Therefore, FIRST option is correct.

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Find the area of the circle with the given radius or diameter. use = 3.14. r = 6 a =
Slav-nsk [51]
A=πr2 A=3.14 x 6 x 6 answer=113.04
3 0
4 years ago
Read 2 more answers
Jacob is saving to buy an MP3 player that costs $195. He earns $225 a week at a part-time job. His expenses are $180 a week. If
Paha777 [63]

Jocab will take 4 more weeks to buy that MP3 player.

<u>Step-by-step explanation:</u>

Given:

Cost of MP3 player = $ 195

Earning per week = $ 225

Expenses per week = $ 180

To Find:

Weeks still required to save money for buying MP3 player.

Formula to be used:

Savings per week = Earning - Expenses

Solution:

Savings per week = Earning - Expenses

                              = $ 225 - $ 180     = $ 45

Already saved = $ 55

Need to save = $ 195 - $ 55 = $ 140

So for 4 weeks savings = $ 45 × 4 = $ 180

Thus Jocab will take 4 more weeks to buy that MP3 player.

8 0
3 years ago
Read 2 more answers
Can someone help me with this??
dusya [7]

Answer:

Carlos and Pamela drove 120 miles on the first day, 240 miles on the second day, and 290 miles on the third day.

Step-by-step explanation:

Let x be the number of miles driven on the first day.

Then they drove twice as many miles, or 2x on the second day

and 50 miles more than the second day's, so 2x + 50

The total is 650 across all three days, so we'll take the sum.

x + 2x + (2x + 50) = 650

Combine like terms on the left

5x + 50 = 650

Subtract 50 on both sides

5x = 600

Divide by 5 on both sides

x = 120

Check work:

120 + 2(120) + 2(120) + 50 = 650

120 + 240 + 240 + 50 = 650

600 + 50 = 650

650 = 650

So they drove 120 miles on the first day

2*120 = 240 miles on the second day

and 2*120 + 50 = 240 + 50 = 290 miles on the third day

4 0
3 years ago
Find the principal value of the augment z=1-i​
Anon25 [30]

Answer:

zgsvdgbsgsgsvusnsns

Step-by-step explanation:

xvsbjshshshhsbdjdhiheganskifndondhdnjdbxjbdhdhdhdhdbjdhdtwjjsbdughdJKsohagywndhnfidhuqjworohthxbzbzj

4 0
3 years ago
The ratio of star beads to moon beads in a bracelet is 9:6.
Arlecino [84]
So for every 9 star beads you have, you have 6 moon beads. The rule is dividing.
6 divided by two (because we have two moon beads) is 3.
9 divided by three (because that's the answer to the first part) is 3.
So there are 3 star beads.
6 0
3 years ago
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