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dsp73
3 years ago
9

3.9 point is equivalent to how many tenths?

Mathematics
2 answers:
Dimas [21]3 years ago
6 0

Answer with explanation:

3.9= 3 ones + 9 Tenths

1 ones =10 Tenths

3 ones =3 × 10 Tenths=30 Tenths

3.9=30  Tenths +9  Tenths

    =39 Tenths

So, 39 Tenth

     =\frac{39}{10}\\\\=3.9

crimeas [40]3 years ago
3 0
10 is in 3, so that's 30. There's another 9.

30 + 9 = 39.

39 tenths.
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A stockbroker has money in three accounts. The interest rates on the three accounts are 7%, 8%, 9%. If she has twice as much mon
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Answer:

x=amount invested at 7%

2x=amount invested at 8%

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interest=principal*rate*time (time=1 year)

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Step-by-step explanation:

5 0
3 years ago
4.
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Answer:

See Explanation Below

Step-by-step explanation:

Given

(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx.cos x.

Required

Prove

To start with; we open the bracket on the left hand side

(sin x - cos x)^2 = (sin x - cos x)(sin x - cos x)

(sin x - cos x)^2 = (sin x )(sin x - cos x)- (cos x)(sin x - cos x)

(sin x - cos x)^2 = sin^2 x -sinx cos x - sin xcos x + cos^2 x

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Reorder

(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x

From trigonometry;

sin^2x + cos^2x = 1

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Also from trigonometry;

sec^2x - tan^2x = 1

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Answer:

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Step-by-step explanation:

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The equation of the line that passes through the given point  (-9,5) is

y =mx +b

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