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julia-pushkina [17]
3 years ago
8

What is cos 45º?

Mathematics
2 answers:
steposvetlana [31]3 years ago
8 0

Answer:

The exact value of cos(45°) is √(2) / 2.

Step-by-step explanation:

daser333 [38]3 years ago
5 0

Answer:

Answer:√2/2=cos45

√2/2×√2/√2=2/2√2

1/√2

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The temperature in the morning was−8 °F. The temperature dropped 13 degrees by night. What is the temperature at night?
Firlakuza [10]

Answer:

-21 degrees

Step-by-step explanation:

-8+(-13)=-21

7 0
2 years ago
Wich expression best estimates - 18 1/4 divided by 2 2/3
yKpoI14uk [10]

-18/3

18/(-3)

<h2>Explanation:</h2>

The complete question is as follows:

________________________________________________

Which expression best estimates -18 1/4 divided by 2 2/3?

18/3

-18/3

-18/(-3)

18/(-3)

________________________________________________

So in this exercise, we have two mixed fractions. This type of fractions comes from the combination of a whole number and a proper fraction fraction (numerator less than denominator). In order to solve this problem, we need to transform these mixed fractions into improper fractions (numerator greater than denominator). So:

-18 \frac{1}{4}=-\left(18+\frac{1}{4}\right) \\ \\ Cross \ Multiplication\  -\left(\frac{18\times4+1}{4}\right) \\ \\ Solving \ numerator \ -\frac{72+1}{4} \\ \\ Simplifying \ -\frac{73}{4}

2 \frac{2}{3}=2+\frac{2}{3} \\ \\ Cross \ Multiplication\  \frac{2\times 3+2}{3} \\ \\ Solving \ numerator \ \frac{6+2}{3} \\ \\ Simplifying \ \frac{8}{3}

By dividing:

\frac{-\frac{73}{4}}{\frac{8}{3}} \\ \\ It's \ the \ same \ as: \\ \\ -\frac{73\times 3}{8\times 4}=-\frac{219}{32} \approx -6.84

<em>So the expressions that best estimates -18 1/4 divided by 2 2/3 are:</em>

<em>-18/3 </em>

<em>18/(-3)</em>

<em>Whose value in decimal form is -6.0</em>

<h2 /><h2>Learn more:</h2>

Estimate the distance between cities: brainly.com/question/12062666

#LearnWithBrainly

7 0
3 years ago
PLEASE HELP ME ASAP!! Write the following statement as an inequality: 8 less than a number w is under 35.
Lesechka [4]

Answer:

8<w<35

Step-by-step explanation:

the w has to be over 8, but less than 35, so 8<w<35 is ur answer.

// have a great day //

3 0
3 years ago
I need help please and thank you ( umm 10 points i think ). thank u
ella [17]

Answer:

D

Step-by-step explanation:

since it tells you y is=1 plug that into the top equation

-1=5x+4

-1=x

and you already have y=-1

so its(-1,-1)

5 0
3 years ago
Read 2 more answers
11111111111111111111111111
Blababa [14]

is this for points cuz if it is then thank you :D

7 0
3 years ago
Read 2 more answers
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