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3 years ago

White an expression that is equivalent to 3(7 + x )

Mathematics

2 answers:

nignag [31]3 years ago

8 0

Answer:

21+3x

Step-by-step explanation:

alexandr402 [8]3 years ago

6 0

Answer:

21 + 3x

Step-by-step explanation:

Use the distributive property to multiply each of the umber by 3 and then you will get 21 + 3x

Hope this helps :)

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Round these decimals to 2 decimal places. a) 4.148 b) 5.092 c) 0.458 d) 17.315

ivolga24 [154]

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).

If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).

a) 4.148 ≈ 4.15
b) 5.092 ≈ 5.09
c) 0.458 ≈ 0.46
d) 17.315 ≈ 17.32

8 0

3 years ago

Read 2 more answers

TKSC Company has one employee, Reba Shas. FICA Social Security taxes are 6.2% of the first $117,000 paid to its employee, and FI

WITCHER [35]

Answer:

Step-by-step explanation:

The picture attached is the complete question for this problem while the word file attached is the solution to the problem.

8 0

4 years ago

Survey data indicate that 42% of customers at Mega Hit video rental stores subscribe to premium movie channels through their cab

omeli [17]

Answer:

P=0.17

Step-by-step explanation:

If A and B are dependent events, then we have a Rule of Addition:

$P(A\cup B)=P(A)+P(B)-P(A\cap B)$

Let A represent event that customer at Mega Hit is subscribed to premium movie channels while B represent event that customer at Mega Hit owns a DVD, so, we get the following:

$P(A)=0.42\\P(B)=0.31\\P(A \cup B)=0.56\\\\$

We need to find $P(A \cap B)$ or probability that a randomly selected Mega Hit customer both owns a DVD and subscribes to a premium movie channels.

Using Rule of Addition, we get:

$0.56=0.42+0.31-P(A \cap B)\\\\0.56=0.73-P(A\cap B)\\P(A\cap B)=0.73-0.56\\P(A\cap B)=0.17$

So, the required probability is 0.17.

7 0

4 years ago

Solve these problems for me please! ASAP show all work! 7.24 ÷ 7=? 11.4 ÷ 19?

GalinKa [24]

7.24/7=1.04
7.00/7= 1 0.24/7= .04 1+0.04=1.04

11.4/19= 0.6
https://www.calculatorsoup.com/calculators/math/longdivisiondecimals.php?dvsor=19&dvdnd=11.4&decimal...

Kinda hard to show work for second one so posted a link.

7 0

3 years ago

Find dy/dx and d2y/dx2. x = cos(2t), y = cos(t), 0 < t < π

pogonyaev

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm dt}}{\frac{\mathrm dx}{\mathrm dt}}$

$y=\cos t\implies\dfrac{\mathrm dy}{\mathrm dt}=-\sin t$
$x=\cos2t\implies\dfrac{\mathrm dx}{\mathrm dt}=-2\sin2t=-4\sin t\cos t$
$\implies\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{-\sin t}{-4\sin t\cos t}=\dfrac14\sec t$

Let $z=\dfrac{\mathrm dy}{\mathrm dx}$ . Then

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm dz}{\mathrm dx}=\dfrac{\mathrm dz}{\mathrm dt}\dfrac{\mathrm dt}{\mathrm dx}=\dfrac{\frac{\mathrm dz}{\mathrm dt}}{\frac{\mathrm dx}{\mathrm dt}}$
$\implies\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\frac{\mathrm d}{\mathrm dt}\left[\frac14\sec t\right]}{-4\sin t\cos t}=\dfrac{\frac14\sec t\tan t}{-4\sin t\cos t}=-\dfrac1{16}\sec^3t$

4 0

4 years ago

White an expression that is equivalent to 3(7 + x )​

White an expression that is equivalent to 3(7 + x )