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Travka [436]
3 years ago
11

Help? Please...............

Mathematics
1 answer:
siniylev [52]3 years ago
8 0

Answer:

3

Step-by-step explanation:

→ Find the scale factor increase

6 ÷ 4 = 1.5

→ Multiply the scale factor by the corresponding length

2 × 1.5 = 3

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The sum of two numbers is 9.9, and the sum of the squares of the numbers is 53.21. What are the numbers?
Snezhnost [94]

Answer:

There are two possibilities:

x_{1} = 3.5 and y_{1} = 6.4

x_{2} = 6.4 and y_{2} = 3.5

Step-by-step explanation:

Mathematically speaking, the statement is equivalent to this 2-variable non-linear system:

x + y = 9.9

x^{2} + y^{2} = 53.21

First, x is cleared in the first equation:

x = 9.9 - y

Now, the variable is substituted in the second one:

(9.9-y)^{2} + y^{2} = 53.21

And some algebra is done in order to simplify the expression:

98.01-19.8\cdot y +2\cdot y^{2} = 53.21

2\cdot y^{2} -19.8\cdot y +44.8 = 0

Roots are found by means of the General Equation for Second-Order Polynomials:

y_{1} \approx \frac{32}{5} and y_{2} \approx \frac{7}{2}

There are two different values for x:

y = y_{1}

x_{1} = 9.9-6.4

x_{1} = 3.5

y = y_{2}

x_{2} = 9.9 - 3.5

x_{2} = 6.4

There are two possibilities:

x_{1} = 3.5 and y_{1} = 6.4

x_{2} = 6.4 and y_{2} = 3.5

5 0
3 years ago
Justin weighs 15 pounds less than Greg weighs. Half of Greg’s weight is 75 pounds less than Justin’s weight. How much does each
Ira Lisetskai [31]

Answer:

Justin weighs 165 pounds.

Greg weighs 180 pounds.

3 0
3 years ago
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If f(x)= 3x squared - 2x + 1 what is f(x+2)
Crazy boy [7]
2x squared would be you final answer
4 0
3 years ago
In one study, it was found that the correlation coefficient between two variables is -0.93.
Marysya12 [62]

the answer is d (i think) because anything aboveboard .90, whether it is positive or negative

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3 years ago
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15 POINTS!!!! HELPP PLEASEE QUICK I NEED IT NOWW PLSS I POSTED THIS SO MANY TIMES PLSSS NO LINKS NO BOT OR ANSWERS JUST TO GET P
Ira Lisetskai [31]

Answer:

Pretty sure its A and B

Step-by-step explanation:

Slope is -6/5, so that leaves just A B and E

Plugged it in, only A and B were correct

8 0
3 years ago
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