3 years ago

Need help on these three. thanks:))

Mathematics

1 answer:

Anton [14]3 years ago

4 0

1. 0.3% or 30%
2. 15 minutes
3. 48 times

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Plz help me plz plz plz plz plz

Blababa [14]

38m².

Answer:

Solution given;

diagonal 1=8+11=19m

diagonal 2=2+2=4m

the area of a kite =½*diagonal 1*diagonal 2

=½*4*19=38m²

The area of kite is 38m².

7 0

2 years ago

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Which expression is equivalent to (16 x 8 y - 12) 1 / 2

kari74 [83]

Answer: I don't really know exactly what you are asking for but does this help? 8x4y-6

Step-by-step explanation:

Distribute the 1/2 to each of the factors. If you need me to explain further please let me know :)

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3 years ago

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If (x - 4) varies inversely as (y + 3) and x = 8 when y = 2, what is x when y = - 1?

denpristay [2]

Answer:

$x=14$

Step-by-step explanation:

If two values are inversely proportional, their product must be maintained. That way, if one value goes up, the other goes down by the same extent.

Therefore, if $(x-4)$ and $(y+3)$ vary inversely, their product will be the same for all values of $x-4$ and $y+3$ .

Let $x=8$ and $y=2$ as given in the problem. Substitute values:

$(8-4)(2+3)=(4)(5)=20$

Hence, the maintained product is $20$ .

Thus, we have the following equation:

$(x-4)(y+3)=20$

Substitute $y=-1$ to find the value of $x$ when $y=-1$ :

$(x-4)(-1+3)=20,\\(x-4)(2)=20,\\x-4=10,\\x=10+4=\boxed{14}$

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2 years ago

Jane drives at a constant rate of 45 miles per hour for 4 hours. How far will she have traveled in that time?

bearhunter [10]

180 miles per hour. 45*4 to get the answer.

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3 years ago

Help me answer this question

Allushta [10]

Use the formula a^2+b^2=c^ which is 7.21

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3 years ago

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