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MrMuchimi
3 years ago
6

Help please!! which statements are true??

Mathematics
2 answers:
solniwko [45]3 years ago
5 0

Answer:

The answers are B. All rectangles are squares and C. All rectangles are parallelograms.

Step-by-step explanation:

Rectangles are squares, they're just shaped differently.

They are also parallelograms because the lines are parallel to each other.

True [87]3 years ago
4 0

Answer:

i don't know but if it we're me i'd pick the answer i think it is good luck though

Step-by-step explanation:

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Estimate <br> 12.4 × 18 <br> —————-<br> 0.012
Artist 52 [7]

Answer: 12.4 x 18

-------------- = 18600

0.012

7 0
2 years ago
Find the vertex.<br> 4) y=-2x^2-8x-6
Alexxx [7]

Answer:

Vertex: (-2, 2)

Step-by-step explanation:

The x-coordinate of the vertex would be as follows;

x = -b/2a = 8/2(-2) = -8/4 = -2

respectively the y-coordinate of the vertex would be y(-2) = -2(-2)^2 - 8(-2) - 6 = -2(4) + 16 - 6 = - 8 + 10 = 2

Your vertex would be a maximum of (-2, 2)

* I say maximum as the coefficient of x^2 is -2, and it is less than zero so the parabola opens downward

3 0
3 years ago
A plane travels 236 miles in 1. 4 hours against the wind. On the return trip, it travels the same 236 miles in 1 hour. Find the
KIM [24]
Speed is given by the distance traveled divided by the time spent.

The net speed with which the plane traveled against the wind is given by \frac{236}{1.4} =168.57\ mi/hr while the speed with which the plane travelled in the return trip is given by \frac{236}{1} =236\ mi/hr 

Let the speed of the plane be v and the speed of the wind be w, then when the plane was traveling against the sun, we have, v - w = 168.57 and when the plane is travelling in the direction of the wind, we have, v + w = 236.

 Subtracting the first equation from the second equation, we have: 2w = 236 - 168.57 = 67.43

Thus, w = 67.43 / 2 = 33.715

Therefore, the speed of the wind is approximately 33.7 mi/hr.
5 0
3 years ago
Read 2 more answers
What is the total amount for an investment of $1000 invested at 7.25% for 15 years and compound continuously?
Iteru [2.4K]

Answer:

\$2,966.85  

Step-by-step explanation:

we know that

The formula to calculate continuously compounded interest is equal to

A=P(e)^{rt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest in decimal  

t is Number of Time Periods  

e is the mathematical constant number

we have  

t=15\ years\\ P=\$1,000\\ r=0.0725  

substitute in the formula above  

A=\$1,000(e)^{0.0725*15}=\$2,966.85  

5 0
3 years ago
Which of the following results in a sum or a product that is rational? Choose all that apply. (3 points)
Kazeer [188]

Remark

It is easier in this case to state the irrational ones and then talk about the rationals.

sqrt(2) * sqrt(3) is irrational. The square root of 6 fills your calculator's window with many numbers and there is no pattern to them. Sqrt(6) cannot be expressed as a fraction or a repeating decimal which is also a fraction.

The last one is also irrational for the same reason. 3*pi cannot be expressed as either a repeating decimal or a fraction.

All the others are rational. The one you might have trouble with is the first one.

0.12 repeating is actually found by letting x = 0.12121212121212121212...Then

100 x =  12.121212121212121212 ...

<u>       x =    0.121212121212121212..</u>.     Subtract

99 x = 12

x = 12/99

So the mixed fraction you get is 3 12/99 which is 309/99

When you multiply that by 1.4 it does not change the fact that you still get a fraction. It turns out to be 721 / 165.  The method is similar to the one used to get 12 / 99. I don't think you need to know the exact answer. You need only need to know that the first one is rational.

Choice 2 is rational because 9 and 25 are  perfect squares. sqrt(9) = 3

Sqrt(25) = 5.

3*5 = 15.

Answer

One Two are four are all rational.

3 0
4 years ago
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