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4 years ago

use place value to find the product 40 x 8 = __ tens x 8 = tens = _5 x 60 = 5 x _ tens = _tens = ___

1 answer:

5 0

40 times 8 =320 Also 4 times 10 = 40 times 8 equal 320 30 times 10 equal 300. 5 times 60 = 300. 5 times 6 tens = 30 tens = 300

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Add 1/ 10 11/100 and select the correct answer. all i got is 12/100 pleaseee help i tried

Vesnalui [34]

I think it's 21/100 because I found the common denominator by multiplying by ten so I multiplied 1 times ten to get 10. Does that help?

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4 years ago

PLEASE HELP ASAP GEOMETRY 20 POINTS REAL ANSWERS ONLY!

DedPeter [7]

Answer:

16.2

Step-by-step explanation:

Use the law of cos

c^2 = 8^2+10.4^2-2*8*10.4*cos(122.2 degrees)

=260.83

c = √260.83 = 16.15

8 0

3 years ago

Simplify the square root of 18/50.<br> A. 3/5<br> B. 5/3<br> C. -3/5<br> D. 5

Harlamova29_29 [7]

The answer would be A.3/5

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3 years ago

kelly has 4times as many songs on her music playlist as lou . tiffany has 6 times s many songs on her playlist as lou . altogeth

Dmitriy789 [7]

Hello! To answer this question we have to make an equation. In this equation I will represent the total number of songs Lou has as the variable x.

So 4x +6x + x = 682

This simplifies to 11x = 682. When you divide both sides by 11 you get x = 62. This is how many songs Lou has.

Since we are trying to find how many songs Kelly has, we must multiple 62 x 4 to get 248. Kelly has 248 songs.

4 0

3 years ago

What is the value of the expression if m = –5 and n = 3? Negative StartFraction 24 Over 25 EndFraction Negative StartFraction 4

KatRina [158]

You can use the fact that a number raised to negative powers can be written as 1 divided by that number raised to positive number.

The value of the given expression when m = -5 and n= 3 is $-\dfrac{2}{5}$

<h3>How can we rewrite a number raised to negative power?</h3>

Suppose we've got $a^{-b}$ . then it can be rewritten as

$a^{-b} = \dfrac{1}{a^b}$

It is because $a^0 = 1$ for any a except 0, and that $\dfrac{a^0}{a^b} = a^{0-b} = a^{-b}$

If base are same and there is multiplication, then there will be addition in power.

Also, know the fact that if base are same and there is division, there will be subtraction in power(subtracting since that denominator when goes up, its power gets negated(gets negative sign to the existing power)

Thus,

$a^b \timesa ^c = a^{b+c}\\\\\dfrac{a^b}{a^c} = a^{b-c}$

<h3>Using above method to simplify the given expression before evaluating</h3>

The given expression is $\dfrac{2m^{-1}n^5}{3m^0n^4} = \dfrac{2n^5}{3m^0m^1n^4} = \dfrac{2n^5}{3mn^4} = \dfrac{2n^{5-4}}{3m} = \dfrac{2n^1}{3m} = \dfrac{2n}{3m}$

Putting m = -5 and n=3, we get:

$\dfrac{2\times 3}{3 \times -5} = -\dfrac{2}{5}$

Thus,

The value of the given expression when m = -5 and n= 3 is $-\dfrac{2}{5}$

Learn more about base and exponent(power) here:

brainly.com/question/847241

4 0

3 years ago

use place value to find the product 40 x 8 = ____ tens x 8 = ____ tens = _____5 x 60 = 5 x ___ tens = ___tens = _____

use place value to find the product 40 x 8 = __ tens x 8 = tens = _5 x 60 = 5 x _ tens = _tens = ___