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Mekhanik [1.2K]
2 years ago
15

I WILL GIVE BRAN;IEST IMAGE BELOW

Mathematics
1 answer:
tino4ka555 [31]2 years ago
10 0

Answer:

21/100 or 0.21

Step-by-step explanation:

21 8th graders have a cell phone and don't have a tablet out of 100 students.

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The present value of R8052.55 received in 5 years at 9% interest is
mel-nik [20]

Answer:

<h2>The present value of a bond is calculated by discounting the bond's future cash payments by the current market interest rate. In other words, the present value of a bond is the total of: The present value of the semiannual interest payments, PLUS. The present value of the principal payment on the date the bond matures.Calculate the present value investment for a future value lump sum return, based on a constant interest rate per period and compounding. This is a special instance of a present value calculation where payments = 0. The present value is the total amount that a future amount of money is worth right now.</h2>

8 0
4 years ago
Logan genetically engineered a new type of fir tree and a new type of pine tree. The combined height of one fir tree and one pin
shepuryov [24]

Answer:

The types of trees that Logan genetically engineered are fir trees <u>9 meters</u> tall and pine trees <u>12 meters</u> tall.

Step-by-step explanation:

Given:

The combined height of one fir tree and one pine tree is 21 meters.

The height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.

Now, to find the height of types of trees that Logan genetically engineered.

<em>Let the height of fir tree be </em>x.<em />

<em>And let the height of pine tree be </em>y.<em />

So, the combined height of both the trees:

x+y=21\\\\x=21-y\ \ \ .....(1)

As given, the height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.

Thus,

4x=y+24

Now, substituting the value of x from equation (1):

4(21-y)=y+24

<em />84-4y=y+24<em />

<em>Subtracting both sides by 24 we get:</em>

<em />60-4y=y<em />

<em>Adding both sides by </em>4y<em> we get:</em>

<em />60=5y<em />

<em>Dividing both sides by 5 we get:</em>

12=y\\\\y=12\ meters.

<u>The height of pine trees = 12 meters.</u>

Now, substituting the value of y in equation to get the height of fir trees:

x=21-y\\\\x=21-12\\\\x=9\ meters.

<u>The height of fir trees = 9 meters.</u>

Therefore, the types of trees that Logan genetically engineered are fir trees 9 meters tall and pine trees 12 meters tall.

4 0
3 years ago
Today only, a sofa is being sold at a 15% discount. The sale price is $782. What was the price yesterday?
PtichkaEL [24]

Answer:

prolly a lot

Step-by-step explanation:

5 0
4 years ago
What is the equation of the line that passes through the point (-5,2)(−5,2) and has a slope of 4/5?
sweet-ann [11.9K]

Answer:

30 = 5y - 4x or 6 + (4x/5) = y (in mx + c = y form)

Step-by-step explanation:

slope =

y_{2} - y_{1}/ x_{2} - x_{1}

now, y_{2} = 2

x_{2} = -5

insert the values of these two in the slope formula and equate it with 4/5.

by cross multiplication, obtain equation.

the equation is 30 = 5y-4x.

hope this helps you!

8 0
3 years ago
Read 2 more answers
Please help! Consider the given circle with the shaded sector xy and central angle 225. The circumference is 30 units
OleMash [197]

\textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ C=30\pi \end{cases}\implies 30\pi =2\pi r\implies \cfrac{30\pi }{2\pi }=r\implies \boxed{15=r} \\\\[-0.35em] ~\dotfill

\textit{arc's length}\\\\ s = \cfrac{\theta \pi r}{180}~~ \begin{cases} r=radius\\ \theta =\stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ r=15\\ \theta =225 \end{cases}\implies \widehat{XY}=\cfrac{(225)\pi (15)}{180}\implies \boxed{\widehat{XY}\approx 58.90} \\\\[-0.35em] ~\dotfill\\\\ \textit{area of a circle}\\\\ A=\pi r^2\qquad \qquad A=\pi (15)^2\implies A=225\pi \implies \boxed{A\approx 706.86}

6 0
3 years ago
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