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viktelen [127]
3 years ago
14

Find the value of a² + b² , when a+ b = 8 and ab = 12

Mathematics
2 answers:
mezya [45]3 years ago
4 0

Answer:

Step-by-step explanation:

6+2=8

6*2=12

6^{2} +2^{2}= 36+4=40

nadezda [96]3 years ago
3 0

Answer:

Here,

<h3>a2 +b2=(a+b)</h3><h3>a {}^{2}  + b {}^{2}  = (a + b) {}^{2}  - 2abso, </h3>

(8) {}^{2}  - 2 \times 12

64 - 2 \times 12

40

Step-by-step explanation:

So,

Therefore,

a {}^{2}  + b {}^{2}  = 40

I'm not sure if this is correct or not, but this the way I learned..

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The temperature dropped from 6 Celsius to -5 Celsius.How many degrees did the temperature drop?
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-11 degrees. 6+5=11, and it went down, so negative 11 degrees

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3. The minimum payment on a credit card is based on the total amount owed. A credit card company uses
shutvik [7]

Answer:

The answer is below

Step-by-step explanation:

The minimum payment on a credit card is based on the total amount owed. A credit card company uses the following rules: For a bill less than $20 the entire amount is due, for a bill of at least $20 but less than $500, the minimum due is $20. For a bill of at least $500 but less than $1000 the minimum due is $40 and for a bill of at least $1000 but less than $1500 the minimum due is $80 dollars. For a bill of $1500 or more the minimum due is 1/10th of the bill.

a. Write a function to describe the minimum payment due.  

b. What is the minimum payment due if the bill is $345?  

c. What is the minimum payment due if the bill is $1410?  

d. What is the minimum payment due if the bill is $1700?

Solution:

Let B represent the minimum due payment for a bill in dollars and let x represent the bill in dollars. Therefore:

For x < 20, B = x

For 20 ≤ x < 500, B = 20

For 500 ≤ x < 1000, B = 40

For 1000 ≤ x < 1500, B = 80

For x ≥ 1500, B = (1/10)x

a)

B(x)=\left \{ {{x\ \ \ x

b) For 20 ≤ x < 500, B = 20

Therefore if the bill is $345 (x = 345), the minimum payment due would be $20

c) For 1000 ≤ x < 1500, B = 80

Therefore if the bill is $1410 (x = 1410), the minimum payment due would be $80

d) For x ≥ 1500, B = (1/10)x

Therefore if the bill is $1700 (x = 1700), the minimum payment due would be $170 (1/10 * 1700)

7 0
3 years ago
Yellow cab taxi charges $3.00 flat rate and $0.65 per mile. If Katie has no more than $10 to spend. How many miles can she trave
Alekssandra [29.7K]

Answer:

0.65+0.65=1.30+0.65=1.95+0.65=2.60

Step-by-step explanation:

well katie if katie wants to spend 3.00 she would have to do add it 4 times and it will be 2.60 and she would save 0.40 cents but if she adds it again it would be 3.25.

6 0
3 years ago
Lines y and z are parallel.
Mrac [35]

Answer:

28 degrees

Step-by-step explanation:

step 1

Find the measure of angle 1

m\angle 1+65^o=180^o ----> by supplementary angles

m\angle 1=180^o-65^o=115^o

step 2

Find the value of x

(10x+5)^o=m\angle 1 ----> by corresponding angles

substitute

(10x+5)^o=115^o

10x=110\\x=11

step 3

Find the measure of angle 2

Remember that the sum of the interior angles in any triangle must be equal to 180 degrees

m\angle 1+m\angle 2+(4x-7)^o=180^o

substitute

115^o+m\angle 2+(4(11)-7)^o=180^o

m\angle 2=180^o-152^o=28^o

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3 years ago
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