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blsea [12.9K]
3 years ago
9

Simplify -4^2 -(-2)^2+7^2=

Mathematics
1 answer:
xxMikexx [17]3 years ago
4 0
Answer is twenty nine
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(Algebra 2) write a polynomial function of least degree with integral coefficients that has the given zeros.
saveliy_v [14]

Answer:

x^{2} -2ix+3=0 .

Step-by-step explanation:

Given the zeroes of the polynomial are

a=-i . and b=3i

The recquired polynomial is (x-a)(x-b)=0

On substituting the values of a and b we get

(x+i)(x-3i)=0

x^{2} -3xi+ix-3i^{2}=0

x^{2} -2ix+3=0 .       (∵i^{2}=-1)

6 0
3 years ago
A city park is in the shape of a triangle where
Licemer1 [7]

Answer:

solution here

length

c=170

a=162

b=177

perimeter=?

now,

perimeter of triangle = a+b+c

=170+162+177

=511

perimeter=511 cm

perimeter = length of fence

therefore,the fence should be 511 cm long.

6 0
3 years ago
David bought a used car for $6,000 and later sold it for $4,000. What was the approximate percent decrease in the price of the c
Vanyuwa [196]

Answer:

percentage change= price change divided by original price x 100

Step-by-step explanation:

so answer = $2000 divided by $6000 x 100 = 33.3% decrease

7 0
3 years ago
Read 2 more answers
If I buy a stereo for $245 and this includes GST of 10%, what is the pre-GST price?
Ivan

Answer:  $222.73

===========================================

Work Shown:

x = pre-GST price

10% of x = 0.10x = tax amount

x + 0.10x = 1.10x = post-GST price = 245

1.10x = 245

x = 245/1.10

x = 222.7272 approximately

x = 222.73 is the price before tax.

------------

Check:

10% of 222.73 = 0.10*222.73 = 22.273 = 22.27

The tax amount ($22.27) is added to the pre-GST price to get

22.27+222.73 = 245

which matches the post-GST price mentioned.

The answer is confirmed.

Or another way to confirm the answer is to calculate this

1.10*222.73 = 245.003 = 245

6 0
3 years ago
Read 2 more answers
A store is having a big sale. Everything is 30% off. but for one day only, an extra 40% will be taken off of the discounted pric
agasfer [191]

Answer:

60

Step-by-step explanation:

It is really easy just subtract the money with the percentage

3 0
3 years ago
Read 2 more answers
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