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3 years ago

Pls help me with this multiple choice !

Mathematics

2 answers:

swat323 years ago

5 0

Answer:

Step-by-step explanation:

$\tan(60) = \frac{13 \sqrt{3} }{y} \\ y = \frac{13 \sqrt{3} }{ \tan(60) } = 13 \\ \cos(60) = \frac{13}{x} \\ x = 26$

deff fn [24]3 years ago

4 0

Just download quanda or photomath to get that answer.

Step-by-step explanation:

Download it in the playstore

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An oblique cylinder has a radius of 8 inches and a volume of 1,024 cubic inches. Use Cavalieri’s Principle to calculate the heig

just olya [345]

$V = \pi r^2 h$

$1,024 ~in^3 = 3.14 \times (8~in)^2 \times h$

$h = 5.1~ in$

8 0

3 years ago

Which two (2) points on the number line below are opposites?

dexar [7]

Answer:

B. B and E

Step-by-step explanation:

A: -5.5

B: -4

C: -2.5

D: 1.5

E: 4

6 0

2 years ago

Read 2 more answers

Compare the speed of the train to the speed of the card. How much less time would it be for Lisa to travel 231 miles using the f

Bingel [31]

Answer:

Faster mode: Car

Less time: 0.93 hour

Step-by-step explanation:

Given

$y = 55x$ --- The equation of travelling by car

See attachment for missing details

Required

Determine by how much less time Lisa will travel 231 miles using the faster mode

First, we calculate the equation of travelling by train.

Start by calculating the slope (m)

$m=\frac{y_2 - y_1}{x_2 - x_1}$

Where

$(x_1,y_1) = (2,90)$

$(x_2,y_2) = (4,180)$

$m = \frac{180 - 90}{4-2}$

$m = \frac{90}{2}$

$m = 45$

The equation is then calculated using:

$y = m(x - x_3) + y_3$

Where

$(x_3,y_3) = (6,270)$

$y = 45(x - 6) + 270$

$y = 45x - 270 + 270$

$y = 45x$

So, we have:

$y = 55x$ --- The equation of travelling by car

$y = 45x$ --- The equation of travelling by train

Next, we calculate the speed travelled using both means for 231 miles.

For travelling by car: Substitute 231 for y in $y = 55x$

$231 = 55 * x$

$x = \frac{231}{55}$

$x = 4.20$

By car, Lisa travels for 4.20 hours

For travelling by train: Substitute 231 for y in $y = 45x$

$231 = 45 * x$

$x = \frac{231}{45}$

$x = 5.13$

By train, Lisa travels for 5.13 hours

So, the faster mode of transportation is the car:

The less time is:

$5.13 - 4.20 =0.93\ hour$

The less time spent is 0.93 hour

4 0

3 years ago

Andy estimated that he would need 78 ft of a lumber for a tree house project. He later found that the actual amount of lumber ne

xxTIMURxx [149]

If we take 78 as the 100%, what's 11 of it?
well $\bf \begin{array}{ccllll}
amount&\%\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
78&100\\
11&x
\end{array}\implies \cfrac{78}{11}=\cfrac{100}{x}$

solve for "x"

6 0

3 years ago

Ben is 50 years old. His son, Carl is 24 years old. How many years ago was Ben 3 times as old as Carl?

Viefleur [7K]

Answer:

Step-by-step explanation:

50 - 24 = 26

26 x 3 = 78

<em>Hope it helps...</em>

5 0

3 years ago