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3 years ago

Answer all these, i need it a lot

Mathematics

2 answers:

fiasKO [112]3 years ago

6 0

1. 28
I only know the first one... sorry

Eva8 [605]3 years ago

3 0

1. y = 28
2. a = -5
3. solutions = one

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Help plz................

Pani-rosa [81]

You have the formula. Put in the numbers and solve for r.

The interest earned in 4 years on 5000 is (6500 -5000) = 1500.
.. I = Prt
.. 1500 = 5000*r*4
.. 1500/20000 = r = .075 = 7.5% . . . . . . matches selection B

7 0

3 years ago

A golden rectangle has side lengths in the ratio of about 1 : 1.618. If the long side of a golden rectangle is 35 cm, what is it

enot [183]

$\bf 1:1.618\iff \cfrac{1}{1.618}\cfrac{\leftarrow \textit{small side=width}}{\leftarrow \textit{longer side=length}}\\\\
-----------------------------\\\\
\textit{now, what if the length is 35?}\to \cfrac{1}{1.618}=\cfrac{w}{\boxed{35}}$

solve for "w" to get the width

what's the area of a rectangle? length * width, or lw

5 0

3 years ago

If one person runs 8.1 miles per hour in one direction and another with a speed of 6.3 in an other direction how many hours woul

djverab [1.8K]

Answer:

1.4 hours

Step-by-step explanation:

Runner A:

Speed = 8.1 mph

Time, = t

Runner B :

Speed = 6.3 mph

Time, = t

Distance apart = 20.16 miles

Distance = speed * time

Distance of Runner A + Distance of runner B = distance apart

8.1t + 6.3t = 20.16

14.4t = 20.16

t = 20.16 / 14.4

t = 1.4 hours

Number of hours, t = 1.4 hours

7 0

2 years ago

(a) use the pythagorean theorem to determine the length of the unknown side of the triangle, (b) determine the perimeter of the

Kisachek [45]

Answer:

(A) 40 km

(B) 90 km

Step-by-step explanation:

To find the missing side of this triangle, let's use the Pythagorean theorem.

$a^2+b^2=c^2$ , assuming that a and b are legs, and c is the hypotenuse.

Assuming the 9km side is a, we need to find the value of b, so we can substitute into the equation.

$9^2+b^2=41^2\\81+b^2=1681\\b^2=1681-81\\b^2=1600\\\\b = \sqrt{1600} \\b=40$

So, the length of the missing side is 40. Now that we know this piece of information, we can find the perimeter and area of the triangle.

The perimeter is all the sides added together, so $41+9+40 = 90$ km is the perimeter.

The area are the two legs multiplied divided by 2.

So,

$\frac{9\cdot40}{2} \\\\\frac{360}{2}\\\\180$

So the area of this triangle is 180 cm²

I hope this helped!

8 0

3 years ago

Which Relation Is A Function ?

adoni [48]

The first one because for every output there is only 1 input

8 0

3 years ago