3 years ago

What is the positive solution to this equation? 4x2 + 12 x= 135

Mathematics

1 answer:

Strike441 [17]3 years ago

4 0

The answer is 2.25.

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Which statements are NOT true?

ser-zykov [4K]

Step-by-step explanation:

${2}^{ - 2} = \frac{1}{ {2}^{2} } = \frac{1}{4}$

but it's given = -4

which is incorrect

Again , 8^2 = 64

but it's given = √64

so option C and D are not true

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3 years ago

The sum of four numbers is 20 and their average is 5. When a fifth is added, the new average is 6. What is the fifth number?

ipn [44]

Answer:

Step-by-step explanation:

We'll note the numbers as $x_{n}, x_{n+1} ...$

$x_1 + x_2 + x_3 + x_4 = 20\\Avg = 5\\\frac{x_1 + x_2 + x_3 + x_4 + x_5 }{5} = 6 = \frac{20 + x_5}{5}\\ 4 + \frac{x_5}{5} = 6\\\\frac{x_5}{5} = 2\\\x_5 = 10$

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3 years ago

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madam [21]

Answer:

Step-by-step explanation:

Sorry need some points

7 0

3 years ago

Can you figure out the missing number

JulijaS [17]

Answer:

probably 6 thats one of the missing ones

4 0

3 years ago

How do I solve this?

Yuki888 [10]

The answer is B. The values of y must only be positive because it is equal to
$| - x|$
The other options states that the values of y could be negative which is why it is wrong.

3 0

4 years ago