2 years ago

Help me I need pls pls pls

Mathematics

1 answer:

stiv31 [10]2 years ago

3 0

Answer:

$2278.50

Step-by-step explanation:

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The gable end of the roof shown is divided in half by a vertical brace. Find the distance h (in ft) from an eave to the peak. 41

nlexa [21]

Answer:

h = 9 ft

Step-by-step explanation:

Assume the diagram is like the one below.

∆ABD is a right triangle.

We can use Pythagoras' Theorem to find the height h.

$\begin{array}{rcl}h^{2} + 40^{2} & = & 41^{2}\\h^{2} + 1600 & = & 1681\\h^{2} & = & 1681 - 1600\\& = &81\\h& = & \sqrt{81}\\&=& \mathbf{9}\end{array}\\\text{The height of the gable is $\large \boxed{\textbf{9 ft}}$}$

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3 years ago

At a swimming race, 3 out of 10 swimmers won a ribbon. What percent of the swimmers won a ribbon?

gogolik [260]

Answer:

30% of the swimmers won a ribbion

and 70% didnt

Step-by-step explanation:

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3 years ago

Work out the surface area of this cylinder.<br>with radius 2 cm<br>and height 4 cm

Tju [1.3M]

Answer:

$75.39cm ^{2}$

Step-by-step explanation:

$area = 2\pi \times r \times h + 2\pi \times {r}^{2} \\ = 2 \times \pi \times 2 \times 4 + 2 \times \pi \times 22 \\ = 75.39822cm ^{2}$

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3 years ago

The slopes of perpendicular line segments are 1/3 and d/5. What is the value of d

a_sh-v [17]

If 2 lines (or line segments) are perpendicular, then the product of their slopes is equal to -1.

Thus, since the given line segments are perpendicular, we have:

$\displaystyle{ \frac{1}{3}\cdot \frac{d}{5}=-1$ .

Multiplying both sides of the equation by 15, we get d=-15.

Answer: d=-15

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3 years ago

On a coordinate grid point P is at (5,8) in point are is a ( -1, -3) points Q and S are a reflection of birth points across the

makkiz [27]

Answer:

The coordinates of Q and S are;

(-5,8) and (1,-3)

Step-by-step explanation:

When we reflect a point with coordinates (x,y) across the y-axis, we get a new point with the coordinates (-x,y)

So (5,8) becomes (-5,8)

and (-1,-3) becomes (1,-3)

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3 years ago