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3 years ago

Answers for the 3 boxes please

Mathematics

2 answers:

puteri [66]3 years ago

7 0

Answer:

-1/7

Step-by-step explanation:

Tomtit [17]3 years ago

3 0

In order for two lines to be perpendicular, their gradients must multiply together to get -1

7*b=-1

7b=-1

Divide both sides by 7

So, the gradient of line b is -1/7

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Sail with the equation by completing the square x^2+8x=-3

maxonik [38]

Answer:

The solutions are $x=-4(+/-)\sqrt{13}$

Step-by-step explanation:

we have

$x^{2} +8x=-3$

Complete the square. Remember to balance the equation by adding the same constants to each side

$x^{2} +8x+16=-3+16$

$x^{2} +8x+16=13$

Rewrite as perfect squares

$(x+4)^{2}=13$

square root both sides

$x+4=(+/-)\sqrt{13}$

$x=-4(+/-)\sqrt{13}$

5 0

2 years ago

What is 20 x 10 to the power of 5

Thepotemich [5.8K]

Answer:

2000

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The area of a rectangular field is 5695 m².

denpristay [2]

Answer:

85 m

Step-by-step explanation:

5696/67=85

3 0

2 years ago

We have a null hypothesis that u=3.75, but we are reluctant to accept this as the population value in case the true value is dif

Gala2k [10]

Answer:

option A

Step-by-step explanation:

To Test

H₀ : μ = 3.75

H₁ : μ ≠ 3.75

now,

If μ = 3.95 then it means H₀ is not true.

then the probability is rejecting the null hypothesis.

Hence, the probability is the power of the test against the alternative μ=3.95

The correct answer is option A

7 0

2 years ago

Need help with these math questions

PSYCHO15rus [73]

$\sqrt{16-x}$ x = 8

Since x = 8, you can plug in/substitute 8 for "x" in the equation:

$\sqrt{16-x}$

$\sqrt{16-8}$

$\sqrt{8}$

2.82842

2.83 You answer is the 4th option

$\sqrt{x+7}$ x = 9

Plug in 9 for "x" in the equation

$\sqrt{x+7}$

$\sqrt{9+7}$

$\sqrt{16}$

4 Your answer is the 1st option

4 0

2 years ago

Answers for the 3 boxes please ​

Answers for the 3 boxes please