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3 years ago

Solve the equation 3(2x+9)=30

Mathematics

2 answers:

MakcuM [25]3 years ago

5 0

Answer:

x=1/2

Step-by-step explanation:

3(2x+9) = 30

Multiply out the 3

6x + 27 = 30

Subtract 27 on both sides

6x = 3

Divide by 6 on both sides

x = 1/2

Delicious77 [7]3 years ago

5 0

Answer:

x=1/2

Step-by-step explanation

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Black_prince [1.1K]

Answer:

Step-by-step explanation:

It is given that EFGH is a rhombus and EG = 16 and FH = 12.

We know that the diagonals of the rhombus are the perpendicular bisectors, therefore OF=6, OH=6, OE=8 and OG=8.

Now, using the Pythagoras theorem in ΔOFG, we have

$(FG)^{2}=(OG)^{2}+(OF)^{2}$

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Hence, option C is correct.

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3 years ago

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Show work for this scientific notation

Viktor [21]

$\frac{5.1*10^{-2}}{4.57*10^{-4}} \\=\frac{5.1*10^{2}}{4.57} \\=\frac{5.1}{4.57}*10^{2}\\=1.1*10^{2}$

The answer is rounded to the nearest tenth.

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3 years ago

match each pair of points with the approximate distance between them. Round your answers to the nearest tenth.

NARA [144]

I hope it helps you.

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Iodine-131 has a half-life of 8 days. How much would be left of an original 40 g sample after 40 days?

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Answer:

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Step-by-step explanation:

If it has a half life of 40 days, there will be 5 half-lives in that span of time so if you divide 40 by 2, 5 times or just $\frac{40}{2^{5} }$ , it will equal 1.25.

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Answer:

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Step-by-step explanation:

Hi student, let me help you out!

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First, let's recall the slope formula: $\boxed{\mathrm{\cfrac{y2-y1}{x2-x1}}}}$ , where y2 and y1 are y-coordinates; x2 and x1 are x-coordinates.