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3 years ago

Explain the difference between [-3] and -3?

Mathematics

1 answer:

Marrrta [24]3 years ago

8 0

Answer:

Step-by-step explanation:

Assuming [-3] is the absolute value of -3 (which is 3), then you get 3-3, which is 0.

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what is the exact value of cos(c+d), given sin c=24/25 for c in quadrant 2 and cos d=-3/4 for d in quadrant 3

maksim [4K]

Answer:

1 3/100

21-24squareroot7/100

=24squareroot7/100

Step-by-step explanation:

3 0

3 years ago

The diagram shows corresponding lengths in two similar figures. Find the area of the smaller figure.

butalik [34]

The area are in the ratio of the squares of corresponding sides.

That is 15^2 : 20^2 = 225:400

so the area of the smaller figure = (225/400) * 64

= 0.5625 * 64

= 36 cm^2 (answer)

5 0

3 years ago

Read 2 more answers

Translate the sentence into an inequality.<br> The sum of 4 and y is less than 15.

bulgar [2K]

I believe the answer would be: 4+y<15

5 0

3 years ago

Please help me with this probability question.

Vikki [24]

Answer:

1.6 please correct me if im wrong by commenting

Step-by-step explanation:

6 0

3 years ago

HELP FAST GIVE A DECENT AMOUNT OF POINTS! FOR EASY!

laila [671]

Answer:

The value of angle is 56.9°

Step-by-step explanation:

First, you have to find the length of hypotenuse using Pythagoras' Theorem, c² = a² + b² :

${c}^{2} = {a}^{2} + {b}^{2}$

$let \: a = 8.25 \\ let \: b = 6.45$

${c}^{2} = {8.25}^{2} + {6.45}^{2}$

${c}^{2} = 68.0625 + 41.6025$

${c}^{2} = 109.665$

$c = \sqrt{109.665}$

$c = 10.47cm \: (4s.f)$

In order to find θ, you have to apply Sine Rule :

$\sin(θ) = \frac{opposite}{adjacent}$

$let \: oppo. = 8.77 \\ let \: hypo. = 10.47$

$\sin(θ) = \frac{8.77}{10.47}$

$θ = { \sin( \frac{8.77}{10.47} ) }^{ - 1}$

$θ = 56.9 \: (1d.p)$

4 0

3 years ago