3 years ago

Evaluate the numerical expression -12.2 - 6.4 divided 0.8

Mathematics

1 answer:

liraira [26]3 years ago

3 0

Answer:

-23.25

Step-by-step explanation:

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The expression m÷4 is the distance each person runs in a relay race that is m miles. How far does each person run in a relay rac

inna [77]

Answer:

Step-by-step explanation:

Replace 20 instead of m

20/4=5

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3 years ago

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Which of the following is equivalent to cos x?

Otrada [13]

ANSWER

D) sin Y

EXPLANATION

The given triangle is a right triangle.

This implies that that:

$x + y = 90 \degree$

Then we have

$y= 90 - x$

Recall that

$\cos(x) = \sin(90 - x)$

But

$90 - x = y$

When we do the substitution, we get,

$\cos(x) = \sin(y)$

Therefore cos(x) is a equivalent to sin(y).

The correct answer is D.

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3 years ago

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Tems11 [23]

Rectangle. it’s a 2d 4 sided shape with 2 sets of parallel sides

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2 years ago

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masya89 [10]

9514 1404 393

Answer:

14 +2i

Step-by-step explanation:

For this sort of problem, you can treat i as though it were a variable. Combine like terms.

(8 -7i) +(6 +9i) = (8 +6) +(-7 +9)i

= 14 +2i

7 0

3 years ago

Establish for which constants c the following function is a density.

Valentin [98]

By "density" I assume you mean "probability density function". For this to be the case for $f(x)$ , we require

$\displaystyle\int_{-\infty}^\infty f(x)\,\mathrm dx=1$

Since

$f(x)=\begin{cases}cx^{1/2}&\text{for }0$

you have

$\displaystyle\int_{-\infty}^\infty f(x)\,\mathrm dx=\int_0^2cx^{1/2}\,\mathrm dx=\dfrac{2c}3x^{3/2}\bigg|_{x=0}^{x=2}=\dfrac{2^{5/2}c}3=1$

which means

$c=\dfrac3{2^{5/2}}=\dfrac3{4\sqrt2}$

7 0

3 years ago