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3 years ago

This Is My Last Question And I'm Giving 20 Points

Mathematics

1 answer:

vekshin13 years ago

3 0

Answer:

you are not giving 20 points you are giving ten

Step-by-step explanation:

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In sunlight, a vertical yardstick casts a 1 ft shadow at the same time that a nearby tree casts a 15 ft shadow. How tall is the

kati45 [8]

Answer: A) 45 ft

Step-by-step

The yardstick is 3ft tall since 1 yard = 3ft. It is 3 times as tall as its shadow. The tree has a 15ft long shadow. The tree should also be 3 times as tall as its shadow. The tree is 15*3ft tall, so it is 45ft tall. I attached an image of the diagram I made.

4 0

3 years ago

Liz has 4/8 of cake and ruby and marks doesnt want it

ozzi

Answer:

i dont get it- was there supposed to be an attachment??

Step-by-step explanation:

8 0

3 years ago

5 1/2 x 4 as square centimeters PLZ HELPPPP

strojnjashka [21]

Answer: 10?

Step-by-step explanation:

I'm guessing the problem based off your description

5 (1/2) x 4 = X

2.5 x 4 = X

X = 10

7 0

3 years ago

Find all the solutions of sin x + cos x = 1 in the interval [0, 2pie).

Mashcka [7]

Answer:

X = 0, π/2 in the interval [0, 2pi).

Step-by-step explanation:

Use the auxiliary angle method:

R sin(x + a) = Rsin x cos a + Rcos x sin a = 1

sin x + cos x = 1

Comparing coefficients:

R cos a = 1 and R sin a = 1, so

tan a = R sin a / R cos a = 1

So a = π/4 radians.

Also R^2(sin^2 a + cos^2 a) = 1^2 + 1^2 = 2

Therefore R = √2.

So √2 sin (x +π/4 = 1

sin x + π/4 = 1/√2

x + π/4 = π/4

x = 0 radians

Also

x = 0 + π/2 = π/2.

8 0

3 years ago

Translate into an algebraic expression and simplify if possible. C It would take Maya x minutes to rake the leaves and Carla y m

lina2011 [118]

Answer:

in one minute they rake $\frac{y+x}{xy}$ leaves working together.

Step-by-step explanation:

If Maya rakes the leaves in x minutes, then, in one minute she rakes $\frac{1}{x}$ leaves.

In the case of Carla, if she rakes the leaves in y minutes, in one minute she rakes $\frac{1}{y}$ leaves.

Therefore, to know the portion of leaves they can rake in one minute working together, we need to sum up both of the portions each one of them rake in one minute, this gives us: $\frac{1}{x}+ \frac{1}{y}$

Now, to simplify this expression:

$\frac{1}{x}+ \frac{1}{y} =\frac{y+x}{xy}$

Thus, in one minute they rake $\frac{y+x}{xy}$ leaves.

8 0

3 years ago