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3 years ago

What is the cosine of 45°

Mathematics

1 answer:

Degger [83]3 years ago

4 0

Cosine 45° = √2/2 (Square root of 2 over 2)

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Translate the equation using a variable. "Nineteen less than one-half of a number is -13."

Illusion [34]

Answer:

1/2a-19=-13

Step-by-step explanation:

One half of a number represents the phrase "1/2a" (in this case the variable/number is 'a'". Then because it says "nineteen less than", that means you subtract 19 from one half of the variable.

3 0

3 years ago

Read 2 more answers

Using data from 2010 and projected to 2020, the population of the United Kingdom (y, in millions) can be approximated by the equ

Nimfa-mama [501]

Answer:

In year 2030 the population is predicted to be 71.75 million

Step-by-step explanation:

* Lets explain how to solve the problem

- Using data from 2010 and projected to 2020, the population of

the United Kingdom (y, in millions) can be approximated by the

equation 10.0 y − 4.55 x = 581

- x is the number of years after 2000

- We need to know in what year the population is predicted to be

71.75 million

* Lets substitute the value of y in the equation by 71,75

∵ The equation of the population is 10.0 y - 4.55 x = 581

∵ y = 71.75

∴ 10.0(71.75) - 4.55 x = 581

∴ 717.5 - 4.55 x = 581

- Subtract 717.5 from both sides

∴ - 4.55 x = - 136.5

- Divide both sides by - 4.55

∴ x = 30

∵ x represents the number of years after 2000

∵ 2000 + 30 = 2030

∴ In year 2030 the population is predicted to be 71.75 million

6 0

3 years ago

Plz help me i cant figure it out

Lelechka [254]

Answer:

35 degrees

Step-by-step explanation:

triangle is always a total of 180 degrees

5 0

3 years ago

Devon uses 64 inches of ribbon to make 1 bow.How many yards of ribbon does Devon need to make 9 BOWS?

krok68 [10]

She would need approximately 16 yards

4 0

3 years ago

Ryan found that the amount of plant food remaining decreased an equal amount each day, and he used the entire 72 milliliters by

BaLLatris [955]

Answer:

A function rule for the relationship between the amount of plant food remaining, f(x), and the number of days that have passed, x is $f(x)=72-12x$

Step-by-step explanation:

We are given that Ryan used 72 mL of food over the course of a 6 day study.

So, He used amount per day = $\frac{72}{6}$

He used amount per day =12 ml/day

Now we are given that t the amount of plant food remaining decreased an equal amount each day, and he used the entire 72 milliliters by the end of his study.

So, The equation becomes : f(x)=72-12x

f(x):The amount of plant food remaining

x : The number of days that have passed

Hence a function rule for the relationship between the amount of plant food remaining, f(x), and the number of days that have passed, x is $f(x)=72-12x$

4 0

3 years ago