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3 years ago

Hey, we are doing a review but I forgot how to set up proportions. Please help me!!

1 answer:

34kurt3 years ago

4 0

It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d. The following proportion is read as "twenty is to twenty-five as four is to five." In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion.

20/25 = 4/5

20 x 5 = 25 x 4

100 = 100

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(8.08×10^-10)÷(4.0×10^-3) in scientific notation?

saw5 [17]

Answer:

$\large\boxed{2.02\times10^{-7}}$

Step-by-step explanation:

The scientific notation:

$a\cdot10^k\\\\1\leq a$

We have:

$(8.08\times10^{-10})\div(4.0\times10^{-3})\\\\=\dfrac{8.08\times10^{-10}}{4.0\times10^{-3}}\\\\=\dfrac{8.08}{4}\times\dfrac{10^{-10}}{10^{-3}}\qquad\text{use}\ \dfrac{a^n}{a^m}=a^{n-m}\\\\=2.02\times10^{-10-(-3)}\\\\=2.02\times10^{-7}$

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3 years ago

ANSWER RIGHT NOW FOR BRAINLIST!!!

LenKa [72]

It's goofy to subtract perimeter and area; they're in different units. We persist.

The area is $s^2$ and the perimeter is $4s$ . so the difference is

$s^2 - 4s = (3 \sqrt{2})^2 - 4(3\sqrt{2}) = 18 - 12 \sqrt{2}$

Answer: choice A

5 0

3 years ago

Read 2 more answers

Is the square root of 2 between 1.3 and 1.4? how do you know!

anastassius [24]

<span>Find the square root of 2 between 1.3 and 1.4
=> Square root of 2 is 1.4
Square root is a number that is multiplied twice like x2, y2
=> 1.4 is the square root of 2
Now, let’s check if we got the correct answer:
=> 1.4 * 1.4
=> 1.96 or rounded to 2
Notice that the square root of 2 is a decimal number, this is called not perfect squares.
Perfect square root are those with whole numbers answers.

</span>

4 0

4 years ago

What is the domain of the function f(x) = + 5?

Greeley [361]

Answer:

The domain of the function is:

$\mathrm{Domain\:of\:}\:\sqrt{x+5}\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x\ge \:-5\:\\ \:\mathrm{Interval\:Notation:}&\:[-5,\:\infty \:)\end{bmatrix}$

Step-by-step explanation:

Given the function

$f\left(x\right)\:=\sqrt{x+5}$

We know that the domain of a function is the set of input or argument values for which the function is real and defined.

From the function, it is clear that for the values x<-5, the function becomes undefined.

For example, for x=-6

√x+5 = √-6+5 = √-1 which is undefined

and for x=-5

√x+5 = √5+5 = √0 which is defined

Thus, the domain of the function is:

$\mathrm{Domain\:of\:}\:\sqrt{x+5}\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x\ge \:-5\:\\ \:\mathrm{Interval\:Notation:}&\:[-5,\:\infty \:)\end{bmatrix}$

3 0

3 years ago

Read 2 more answers

The volume of a right triangular prism is 72 cubic feet.

ValentinkaMS [17]

Answer:

What is the area of the triangular base?

8 square feet

What is the length of edge DF?

4 feet

Step-by-step explanation: I just took it on edge

4 0

3 years ago

Read 2 more answers

Hey, we are doing a review but I forgot how to set up proportions. Please help me!!​

Hey, we are doing a review but I forgot how to set up proportions. Please help me!!