4.

Mathematics

2 answers:

sleet_krkn [62]2 years ago

6 0

0.1875 is the decimal version. You should chose B, the one is not a part of 3/16ths.

fenix001 [56]2 years ago

5 0

The answer is C. because 3/16 is close to 3 because how it’s estimated of the germs and gasoline is how it’s going to hit africa and south america and dacota. hope this helps!!

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Please help with these

MatroZZZ [7]

Set up a proportion.

$\frac{3~minutes}{2~questions}$ = $\frac{x~minutes}{12~questions}$

Cross multiply.

2x=36
x=12

It would take her 12 minutes.

-----------------------------------------

Formula for surface area of a cube: 6a² where a=20.

6 x (20)²
6 x 400
= 2400

Surface area: 2400 cm

----------------------------------------------

Mean absolute deviation: The average distance from each number in the set to the mean of the set.

Mean of the set: $\frac{(3+8+10+12+15)}{5} = \frac{48}{5} = 9.6$

9.6-3=6.6
9.6-8=1.6
10-9.6=0.4
12-9.6=11.4
15-9.6=5.4

Mean of 6.6, 1.6, 0.4, 11.4, and 5.4: $\frac{(6.6+1.6+0.4+11.4+5.4)}{5} = \frac{25.4}{5} = 5.08$

8 0

4 years ago

Solve 3/8=x/20<br><br> whats x??

azamat

3/8=x/20
Multiply both sides by 20.
20(3/8) = 60/8 = 15/2 = 7.5
7.5 = x

4 0

3 years ago

19 of 22

professor190 [17]

B: 3(4-3n)

hope this helps

3 0

3 years ago

Plz plz plz help me quickly I’ll give brainlist!!!!!!!!!!

Nesterboy [21]

Answer:

$16.60 ,and you saved $66.40

5 0

3 years ago

HELP FAST PLEASE!!!!

liq [111]

You are asked to solve the equation $8 cos^{2} x-3cosx=0$ . I have chosen to use x instead of theta but the work is the same.

Notice that you have a quadratic equation set equal to 0. The expression at left can be factored. We do this as follows:
$cosx(8cosx-3)=0$

You have a product (at left) that equals to zero so one or both of the terms equals zero. That is,
cosx=0 and/or $8cosx-3=0$

To solve the first we are looking for an angle measure between 0 and 180 degrees door which the cos of that angle is 0. You can use your calculator and input $cos ^{-1}0=$ and will find the answer to be 90 degrees. You might also know this from the graph of the cosine function.

The second equation can be solved as follows:
$8cosx-3=0$
$cosx=3/8$
You are looking for an angle whose cosine is 3/8 and can use the cosine inverse function on your calculator. Input $Cos^{-1}(3/8)=$ . The answer will be extremely close to 68 degrees and is 68 degrees when rounded.

Thus the two solutions we are looking for are 90 degrees and 68 degrees.

Please note that for this to work your calculator needs to be in degrees (not radians) and that you can control this in the “mode”.

7 0

4 years ago