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3 years ago

What is the rule when multiplying by 10's?

Mathematics

1 answer:

Ivahew [28]3 years ago

4 0

Answer:

To multiply by a power of 10, simply move the decimal to the right the same number of places as the exponent or as the number of zeros.

Step-by-step explanation:

Example: To divide by a power of 10, simply move the decimal to the left the same number of places as the exponent or as the number of zeros.

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A bread recipe calls for a flour to water ratio of 10 to 7. If 600 grams of flour is used in this recipe, how many grams of wate

polet [3.4K]

Grams of water
= (600/10) x 7
= 420

7 0

2 years ago

Read 2 more answers

PLEASE HELP ME:

Marrrta [24]

Answer:

The answer is...

Step-by-step explanation:

No, because the bike order does not meet the restrictions of 4c+6a (less than or equal to) 120 and 4c+4a (less than or equal to) 100

5 0

3 years ago

Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?

jeka94

by Quadratic formula , $x^2 + 20 = 2x$ , values of x are $x = 1 \pm (1)i\sqrt{19}}$ . None of mentioned options are correct according to question!

<u>Step-by-step explanation:</u>

Here we have , expression x2 + 20 = 2x or , $x^2 + 20 = 2x$ .

We know that Quadratic formula is :

$x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$

$x^2 + 20 = 2x$

⇒ $x^2-2x+20=0$

$a=1\\b=-2\\c=20$

Putting this value in equation $x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$ :

⇒ $x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$

⇒ $x = \frac{-(-2) \pm \sqrt{(-2)^{2}-4(1)(20)}}{2(1)}$

⇒ $x = \frac{2 \pm \sqrt{4-80}}{2}$

⇒ $x = (\frac{2 \pm 2i\sqrt{19}}{2})$

⇒ $x = 1 \pm (1)i\sqrt{19}}$

Therefore , by Quadratic formula , $x^2 + 20 = 2x$ , values of x are $x = 1 \pm (1)i\sqrt{19}}$ . None of mentioned options are correct according to question!

7 0

3 years ago

The area of a rectangle is expressed as x4 - 9y2. What are the possible dimensions of the rectangle?

AnnyKZ [126]

This is a stupid question. The teacher who asked this needs to go back to school.

A = x⁴ - 9y²

That's going to be a number. As long as it's positive we can choose any length for our rectangle L and we can compute the width by W=A/L. So the correct answer is the dimensions are L by (x⁴ - 9y²)/L.

They don't want the correct answer. They want you to factor this expression. We'll do it, but don't believe for a second this factoring somehow constrains the possible dimensions of some rectangle.

We use the difference of two squares, a²-b² = (a+b)(a-b)

A = x⁴ - 9y² = (x²)² - (3y)² = (x²+3y)(x²-3y)

Answer: x²+3y by x²-3y

5 0

3 years ago

Type the correct answer in each box. Use numerals instead of words.

Hatshy [7]

Answer:

$(4,-3)$ and $(-2,5)$

Step-by-step explanation:

It was given that the points $(-3,4)$ and $(5,-2)$ are on the graph of the function $f$ .

If $g$ is the inverse function of $f$ , then $g$ will take the y-values as inputs and give the x-values as outputs.

Hence we will have the ordered pairs $(4,-3)$ and $(-2,5)$

on g.

In other words, f and g are symmetric about the line $y=x$ . This implies that when we reflect the points $(-3,4)$ and $(5,-2)$ in the line $y=x$ we will obtain $(4,-3)$ and $(-2,5)$ .

This point must lie on g.

8 0

3 years ago

Read 2 more answers

What is the rule when multiplying by 10's?​

What is the rule when multiplying by 10's?