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7nadin3 [17]
3 years ago
11

The picture shows a triangular island: Which expression shows the value of e?

Mathematics
2 answers:
zalisa [80]3 years ago
7 0

d over cos 65 degrees

grin007 [14]3 years ago
3 0
Check the picture below.

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Solve the equation. Please show your work.<br>2(-5x+7)=-6
just olya [345]

2 \times  - 5x =  - 10x
2 \times 7 = 14
- 10x  + 14 =  - 6
- 14
- 10x =  - 20
x = 2
5 0
3 years ago
Read 2 more answers
A rocket is fired upward from some initial distance above the ground. Its height in​ feet, h,above the​ ground, t seconds after
kirill115 [55]
Check the picture below.

\bf \textit{ vertex of a vertical parabola, using coefficients}\\\\&#10;\begin{array}{lccclll}&#10;h(t) = &{{ -16}}t^2&{{ +96}}t&{{ +2560}}\\&#10;&\uparrow &\uparrow &\uparrow \\&#10;&a&b&c&#10;\end{array}\qquad &#10;\left(-\cfrac{{{ b}}}{2{{ a}}}\quad ,\quad  {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}\right)

so.. the maximum point is at   \bf {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}~~~ft

and it happened after   \bf -\cfrac{{{ b}}}{2{{ a}}}~~~seconds

--------------------------------------------------------------------------

now, when the rocket reaches the ground, as you saw on the picture, y = 0, thus

\bf h(t)=-16t^2+96t+2560\implies 0=-16t^2+96t+2560&#10;\\\\\\&#10;0=-16(t^2-6t-160)\implies 0=t^2-6t-160&#10;\\\\\\&#10;0=(t-16)(t+10)\implies t=&#10;\begin{cases}&#10;\boxed{16}\\&#10;-10&#10;\end{cases}

"t" is an amount in seconds, for this specific phenomena, it cannot be negative, so -10 is not a feasible value.

8 0
3 years ago
Read 2 more answers
The circumference of a circle is 30t. What is its area? ​
labwork [276]

Answer:

A=\frac{225t^2}{\pi} given the circumference is 30t.

Step-by-step explanation:

The circumference of a circle is C=2\pi r and the area of a circle is A=\pi r^2 assuming the radius is r for the circle in question.

We are given the circumference of our circle is 2 \pi r=30t.

If we solve this for r we get: r=\frac{30t}{2\pi}.  To get this I just divided both sides by 2\pi since this was the thing being multiplied to r.

So now the area is A=\pi r^2=\pi (\frac{30t}{2 \pi})^2.

Simplifying this:

A=\pi (\frac{30t}{2 \pi})^2.

30/2=15 so:

A=\pi (\frac{15t}{\pi})^2.

Squaring the numerator and the denominator:

A=\pi (\frac{(15t)^2}{(\pi)^2}

Using law of exponents or seeing that a factor of \pi cancels:

A=\frac{(15t)^2}{\pi}

A=\frac{15^2t^2}{\pi}

A=\frac{225t^2}{\pi}

4 0
3 years ago
A 22° B 54° С What is the measure of AD? O 108° 0 27° 126 54°​
Anna35 [415]

Answer:

A. 108

sorry if im wrong but if u am I'm so sorry

6 0
2 years ago
Two angles form a linear pair the Measure of one angle is 2.6 times the measure of the other angle find the measure of each angl
Sedaia [141]

Answer:

The measures of the angles are 50° and 130°

Step-by-step explanation:

Let

x ----> the measure of one angle

y ----> the measure of the other angle

we know that

If two angles form a linear pair , then their sum is equal to 180 degrees

x+y=180 -----> equation A

x=2.6y ----> equation B

substitute equation B in equation A

2.6y+y=180

solve for y

3.6y=180

y=50^o

Find the value of x

x=2.6(50)=130^o

The measures of the angles are 50° and 130°

3 0
4 years ago
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