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3 years ago

What is the solution of 1-3x= x + 3 ?

2 answers:

6 0

1 - 3x = x + 3    |subtract 1 from both sides

-3x = x + 2     |subtract x from both sides

-4x = 2    |divide both sides by (-4)

x = 2/-4

x = -0.5

Scorpion4ik [409]3 years ago

3 0

1 -3x = x + 3
-1 -1

-3x = x + 2
-x -x

-4x = 2
/-4 /-4

x = $\frac{-1}{2}$

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What is 76-183+56-1,543 (15 points)

WITCHER [35]

Use Pemdas
76-183+56-1,543
-107+56-1,543
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−1594 is your answer.

Hoped I helped!

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3 years ago

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It costs you $10 to draw a sample size n=1 and measure the attribute of interest. you have a budget of $1,200

kicyunya [14]

a. Do you have sufficient funds to estimate the population mean for the attribute of interest with a 95% confidence interval 4 units width? Assume that sd= 12

n= {[(Zalpha/2)^2]*[sd]^2}/ se^2

n= (1.96)^2*(12)^2/ (2)^2

n= 138.297 rounded up to 139

There is not enough funds for this one since you’ll need 139 pieces and it costs 10 a piece, you’ll need 1390.

b. 90% confidence interval

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3 years ago

What’s the missing angle ?

fomenos

Answer:

x=20

3x= 3(20)=60

4x= 4(20)=80

Step-by-step explanation:

The angles CD is 90 degrees because the small square indicates

it. Angles AD are a straight angle, therefore all the other angles within A to D, must equal 180 degree. (straight line/angle=180 degrees).

so AB + 70+ 90= 180 degrees

AB= 180 -70-90

AB=20

x=20

3x= 3(20)=60

4x= 4(20)=80

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2 years ago

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The sun produces 3.9 ⋅ 10 to the 33th power ergs of radiant energy per second. How many ergs of radiant energy does the sun prod

arlik [135]

So the sun produces 3.9x10³³/ second

Using this ratio (3.9x10³³/ second) we can use the porpotions to calculate time taken (T) to produce 1.55x10⁷.

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Then isolate T and find the time

$\frac{T3.9(10^3)ergs}{1 second} = {1.55(10^7)ergs$
$T3.9(10^3)ergs = ({1.55(10^7)ergs)seconds$
$T = \frac{(1.55(10^7)ergs)seconds}{3.9(10^3)ergs}$
$T = \frac{(1.55(10^7)seconds}{3.9(10^3)}$
$T = \frac{1.55}{3.9}(10^4)seconds$
$T = 0.397(10^4)seconds$
$T = 3.97(10^-^1)(10^4)seconds$
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Thus it took 3.97x10³ seconds for 1.55x10⁷. of ergs to be produced
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The orders of pairs are 23

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