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3 years ago

Simplify: 3 × 22 + 8 ÷ 2 - (5 + 2)

Mathematics

2 answers:

Alexxandr [17]3 years ago

5 0

Step-by-step explanation:

BODMAS which means

B- brackets

O- of

D- division

M- multiplication

A- addition

so that means you start with the brackets

(5+2)= 7

then with the division

8 / 2-7

4-7= -3

3 x 22+(-3)

66+(-3)

+ X - = -

66-3=63

SCORPION-xisa [38]3 years ago

5 0

Step-by-step explanation:

3 times 22 is 66

8 divided by 2 is 4

66 plus 4 is 70 minus 3 is 67

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The angle x is half the sum of the intercepted arcs, PQ and NO.

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3 years ago

The notation f:S→T denotes that f is a function, also called a map , defined on all of a set S and whose outputs lie in a set T

AnnyKZ [126]

Answer:

There are many. Two examples are

$f(x) = x, \\f(x) = x^3$

Step-by-step explanation:

There are many examples. The simplest is

1 -

$f(x) = x$

It is trivial that

$\text{if \,\,\,\,} f(x) = f(y) \,\,\,\,\,\text{then} \,\,\,\,\, x=y$

2 -

$f(x) = x^3$

That function is injective as well.

$\text{if \,\,\,\,} x^3 = y^3 \,\,\,\,\,\text{then} \,\,\,\,\, x=y$

An example of a function that is NOT injective is

$f(x) = x^2$

Notice that

$f(-2) = (-2)^2 = 2^2 = 4$

4 0

4 years ago

In which quadrant does the point (–10, –9) lie

ludmilkaskok [199]

The 3rd quadrant bc they are both negative points

5 0

3 years ago

During a long drive, Tony counted the number of pickups and sedans he saw driving in the opposite direction. After a while, he n

snow_lady [41]

At this ratio, he would have counted 45 sedans if he had passed 18 pickups. The ratio between the pickups and the sedan is two by five, therefore he already has faced 9 times of this situation if he had already seen 18 pickups passed over. The number of sedans counted by him can be obtained by multiplying the sedans number of the ratio which is 5 with the number of the situation that had passed which is 9.

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3 years ago

In one town, 47% of all voters are Democrats. If three

34kurt

Answer:

The probability that the all three votes are Democrats

P(X=3) = 0.1038

Step-by-step explanation:

Step(i):-

Given that the all voters are democrats

The probability that the all voters are democrats

p = 47% =0.47

q = 1-p =1-0.47 = 0.53

Step(ii):-

Let 'X' be the random variable in binomial distribution

$P(X=r) = n_{C_{r} } p^{r} q^{n-r}$

The probability that the all three votes are Democrats

P(X=3) = 0.1038

n=3 and r=3

$P(X=3) = 3_{C_{3} } (0.47)^{3} (0.53)^{3-3}$

$P(X=3) = 1 (0.47)^{3}$

P(X=3) = 0.1038

Final answer:-

The probability that the all three votes are Democrats

P(X=3) = 0.1038

5 0

3 years ago