Hello please help will give brainliest!

Mathematics

1 answer:

jeka57 [31]3 years ago

8 0

The answer is A. because the first part shows the ratio 3:2 and the other 2 shows equivalent ratios.

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If r is ten more than the square root of l , then r = A) l2 + 10 B) (l + 10)2 C) l + 10 D) l + 10 E) l + 10

stiv31 [10]

Answer:

$r=\sqrt {I}+10$

Step-by-step explanation:

We first need to know the square root of I then add 10 on that square root since r is 10 more than the square root of I

Therefore,

$r=\sqrt {I}+10$

4 0

3 years ago

Is 0.212121212121...a rational number because a irrational number does not terminate or repeat?

pentagon [3]

The 21 part repeats

it can be represented as 21/99

it's rational

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3 years ago

In a survey, 2 out of 8 students named math as their favorite subject. Express the rate as a decimal and as a percent.

SVETLANKA909090 [29]

Answer: 0.25 and 25%

Step-by-step explanation:

2/8 is equal to 1/4. 1/4 is the same as 0.25. Move decimal point two spots to the right and BOOM you get 25%.

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3 years ago

Find the area of the triangle. 5 ft 8 ft

natima [27]

Answer:

Step-by-step explanation:

The formula for area is LxW, in this case it’s 5x8 which is 40.

8 0

3 years ago

Read 2 more answers

Find two unit vectors orthogonal to both given vectors. i j k, 4i k

Maurinko [17]

The cross product of two vectors gives a third vector $\mathbf v$ that is orthogonal to the first two.

$\mathbf v=(\vec i+\vec j+\vec k)\times(4\,\vec i+\vec k)=\begin{vmatrix}\vec i&\vec j&\vec k\\1&1&1\\4&0&1\end{vmatrix}=\vec i+3\,\vec j-4\,\vec k$

Normalize this vector by dividing it by its norm:

$\dfrac{\mathbf v}{\|\mathbf v\|}=\dfrac{\vec i+3\,\vec j-4\,\vec k}{\sqrt{1^2+3^2+(-4)^2}}=\dfrac1{\sqrt{26}}(\vec i+3\,\vec j-4\vec k)$

To get another vector orthogonal to the first two, you can just change the sign and use $-\mathbf v$ .

6 0

3 years ago