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3 years ago

9

Explain how to solve the equation.B - 7 = 12

2 answers:

Tatiana [17]3 years ago

6 0

Answer:

So if you take the 12 and add it to the 7 you get 19 then do 19 mines 7 and you get 12 so always add the sum to the number given to get the missing number

Step-by-step explanation:

Have a great day

frutty [35]3 years ago

3 0

Get the B by itself

So take the -7 and add it to the 12 on the other side

So now we have B = 12 + 7

So now B = 19

And now if we replace B

19-7=12

B=19

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Two percent of Jennies skin cells were burned when she escaped from a fire. If

andreev551 [17]

$1.813*10^{12}$ cells of Jennies skin were not burned.

Step-by-step explanation:

Given,

Burned skin cells = $3.7*10^{10}$

This represents 2% of total skin cells.

Let,

x represents the total number of skin cells.

2% of x = $3.7*10^{10}$

$\frac{2}{100}x=3.7*10^{10}\\\\0.02x=3.7*10^{10}$

Dividing both sides by 0.02

$\frac{0.02x}{0.02}=\frac{3.7*10^{10}}{0.02}\\\\x=1.85*10^{12}$

Number of not burned cells = Total - burned

Number of not burned cells = $1.85*10^{12}-3.7*10^{10}$

Number of not burned cells = $1.813*10^{12}$

$1.813*10^{12}$ cells of Jennies skin were not burned.

Keywords: percentage, division

Learn more about division at:

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4 years ago

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The two-way frequency table shows the laptop color preferences, for a random sample of high school students. Which statement is

worty [1.4K]

Answer:

Most males preferred black laptops

Step-by-step explanation:

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3 years ago

Find the greatest common factor 39 of and 44.

lapo4ka [179]

Answer:

There are no common factor between the two or its just 1.

Explanation

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Factors for 44: 1, 2, 4, 11, 22, and 44.

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2 years ago

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Under the rectangular survey system, one section is equal to? 36 acres, 64, 360, 640?

daser333 [38]

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3 years ago

In ΔHIJ, h = 40 cm, ∠J=20° and ∠H=93°. Find the length of j, to the nearest centimeter.

DaniilM [7]

Given:

In ΔHIJ, h = 40 cm, ∠J=20° and ∠H=93°.

To find:

The length of j, to the nearest centimeter.

Solution:

According to Law of sine,

$\dfrac{a}{\sin A}=\dfrac{b}{\sin B}=\dfrac{c}{\sin C}$

In ΔHIJ, using law of sine, we get

$\dfrac{j}{\sin J}=\dfrac{h}{\sin H}$

$\dfrac{j}{\sin (20^\circ)}=\dfrac{40}{\sin (93^\circ)}}$

$j=\dfrac{40\times \sin (20^\circ)}{\sin (93^\circ)}}$

On further simplification, we get

$j=\dfrac{40\times 0.34202}{0.99863}$

$j=\dfrac{13.6808}{0.99863}$

$j=13.69958$

Approximate the value to the nearest centimeter.

$j\approx 14$

Therefore, the length of j is 14 cm.

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3 years ago