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Gwar [14]
3 years ago
6

Which problems will have two decimal places in the product? Mark all that apply.

Mathematics
1 answer:
ivann1987 [24]3 years ago
6 0

Answer:

A: 1.95 Two Decimal places.

B: 9.6 One Decimal place.

C: 81 No Decimal Places.

D: 44.53 Two Decimal Places.

E: 72.2  One Decimal Place.


Mark Brainliest Please to help me get to the next Rank!

#RoadToVituoso!


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Use the power reducing formula to rewrite the expression in therms of first powers of hte cosines of ultiple angles 3cos^4x.
Oxana [17]

The particular identity you want to use is

\cos^2x=\dfrac{1+\cos(2x)}2

Then

3\cos^4x=3(\cos^2x)^2=3\left(\dfrac{1+\cos(2x)}2\right)^2=\dfrac34(1+\cos(2x))^2

Expand the binomial to get

3\cos^4x=\dfrac34\left(1+2\cos(2x)+\cos^2(2x)\right)

Use the identity again to write

\cos^2(2x)=\dfrac{1+\cos(4x)}2

and so

3\cos^4x=\dfrac34\left(1+2\cos(2x)+\dfrac{1+\cos(4x)}2\right)

3\cos^4x=\dfrac38\left(3+4\cos(2x)+\cos(4x)\right)

7 0
3 years ago
Solve 4x-2(x+1)=3x+10
shusha [124]

4x-2(x+1)=3x+10

4x - 2x - 2 = 3x + 10

2x - 2 = 3x + 10

3x - 2x = -2 - 10

x = - 12

Answer is

-12

4 0
4 years ago
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Please help this is urgent!! Will mark brainliest!
Nataly [62]

Answer:

C

Step-by-step explanation:

2·π·6·10+2·π·6^2

4 0
3 years ago
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Write the equation of the line that passes through (-1, 3) and is parallel to the line y = -x + 1.
ra1l [238]

Answer:

Step-by-step explanation:

y = -x + 1......same as y = -1x + 1.....in y = mx + b form, ur slope is in the m position....so the slope of this line is -1.

a parallel line will have the same slope.

(-1,3)...x = -1 and y = 3

slope(m) = -1

y = mx + b.....we have x,y, and m....now we need to find y int (b)

3 = -1(-1) + b

3 = 1 + b

3 - 1 = b

2 = b

so ur parallel equation is : y = -1x + 2...or just y = -x + 2

7 0
3 years ago
2 Solve the equation for x: 3x – 5 = 5x + 2x.<br> Show your work.
Galina-37 [17]

Answer:

—5/4 or —1 1/4

Step-by-step explanation:

3x – 5 = 5x + 2x

Collect like terms

—5 = 5x + 2x — 3x

—5 = 4x

Divide both side by the coefficient of x i.e 4

x = —5/4 or —1 1/4

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