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Mandarinka [93]

2 years ago

5

Tyeewants to buy disposable masks for his family. Blue masks cost $1.50and greenmasks cost $2.50. He has $45to spend and wants t

o buy a total of 20masks.

1 answer:

sasho [114]2 years ago

7 0

Answer:

28

Step-by-step explanation:

im famous bro

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A plane takes off from an airport and flies at a speed of 400km/h on a course of 120° for 2 hours. the plane then changes its co

butalik [34]

Answer:

Distance from the airport = 894.43 km

Step-by-step explanation:

Displacement and Velocity

The velocity of an object assumed as constant in time can be computed as

$\displaystyle \vec{v}=\frac{\vec{x}}{t}$

Where $\vec x$ is the displacement. Both the velocity and displacement are vectors. The displacement can be computed from the above relation as

$\displaystyle \vec{x}=\vec{v}.t$

The plane goes at 400 Km/h on a course of 120° for 2 hours. We can compute the components of the velocity as

$\displaystyle \vec{v_1}=$

$\displaystyle \vec{v_1}=\ km/h$

The displacement of the plane in 2 hours is

$\displaystyle \vec{x_1}=\vec{v_1}.t_1=.(2)$

$\displaystyle \vec{x_1}=km$

Now the plane keeps the same speed but now its course is 210° for 1 hour. The components of the velocity are

$\displaystyle \vec{v_2}=$

$\displaystyle \vec{v_2}=km/h$

The displacement in 1 hour is

$\displaystyle \vec{x_2}=\vec{v_2}.t_2=.(1)$

$\displaystyle \vec{x_2}=km$

The total displacement is the vector sum of both

$\displaystyle \vec{x_t}=\vec{x_1}+\vec{x_2}=+$

$\displaystyle \vec{x_t}=km$

$\displaystyle \vec{x_t}=$

The distance from the airport is the module of the displacement:

$\displaystyle |\vec{x_t}|=\sqrt{(-746.41)^2+492.82^2}$

$\displaystyle |\vec{x_t}|=894.43\ km$

8 0

3 years ago

What is the height of a cylinder with a volume of

Inga [223]

12 is the answer

hope this helps!

4 0

2 years ago

Help! 250(1+0.1)^15 = ??

olganol [36]

Using PEMDAS this is the answer I got 1,042.5 :)

6 0

3 years ago

35 POINTS AND BRAINILEST IF ALL CORRECT

Airida [17]

Answer:

See step-by-step explanation

Step-by-step explanation:

Whole numbers are $0,\ 1,\ 2,\ 3,\ 4,\ ...$

Integer but not whole numbers are $...,\ -4,\ -3,\ -2,\ -1$

Rational numbers are fractions

Irrational numbers are numbers that are not rational

$\pi$ is irrational number

$-100$ is integer but not whole number

$-34$ is integer but not whole number

$-4$ is integer but not whole number

$-\dfrac{8}{4} =-2$ is integer but not whole number

$0.333...=\dfrac{1}{3}$ is rational number

$0.456783...$ is irrational number

$3$ is whole number

$9.23456=\dfrac{923,456}{100,000}$ is rational number

$\sqrt{4}=2$ is whole number

$\sqrt{8}=2\sqrt{2}$ is irrational number

$\dfrac{1}{2}$ is rational number

$\dfrac{49}{7}=7$ is whole number

$\dfrac{89}{10}$ is rational number

$zero$ is whole number

4 0

3 years ago

Find the lengths of sides marked with variables (x, y, w, z). Show all work

natita [175]

Answer:

1) 19.07 m, 2) 80.10 ft, 3) 56.79 m

Step-by-step explanation:

Use <u>trigonometry</u> to solve for unknowns.

<h3>1) Use sine</h3>

<em>sine = opposite leg / hypotenuse</em>

sin 27° = x/42
x = 42 sin 27°
x = 19.07 m (rounded)

<h3>2) Use tangent</h3>

<em>tangent = opposite leg / adjacent leg</em>

tan 23° = 34/x
x = 34 / tan 23°
x = 80.10 ft

<h3>3) Use cosine</h3>

<em>cosine = adjacent leg / hypotenuse</em>

cos 48° = 38/x
x = 38 / cos 48°
x = 56.79 m (rounded)

6 0

2 years ago

Read 2 more answers