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3 years ago

I NEED HELP ASAP PLEASE

Mathematics

2 answers:

kicyunya [14]3 years ago

7 0

I would assume for A the answer would be *8x+8x* and for B I would assume *4+16y*
I hope this helped you!

kvv77 [185]3 years ago

7 0

1. Both 8x+8x and 16x

11x-3x+8x

8x+8x

2. 4+16y and 4*1+4*4y

Multiply

4*1=4

4*4y=16y

4+16y

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4 years ago

At the beginning of an environmental study, a forest covered an area of 1500 km2 . Since then, this area has decreased by 9.8% e

fredd [130]

Answer:

$A(t)=(0.902)^t \cdot 1500$ $[km^2]$

Step-by-step explanation:

In this problem, the initial area of the forest at time t = 0 is

$A_0 = 1500 km^2$

After every year, the area of the forest decreases by 9.8%: this means that the area of the forest every year is (100%-9.8%=90.2%) of the area of the previous year.

So for instance, after 1 year, the area is

$A_1 = A_0 \cdot \frac{90.2}{100}=0.902 A_0$

After 2 years,

$A_2=0.902 A_1 = 0.902(0.902A_0)=(0.902)^2 A_0$

And so on. So, after t years, the area of the forest will be

$A(t)=(0.902)^t A_0$

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4 years ago

Provide a counterexample:

Jobisdone [24]

Answer:

$a=2 \quad \text{and} \quad b=-2$

Step-by-step explanation:

Take $a=2 \quad \text{and} \quad b=-2$ , note that

$2=(-1)\cdot(-2)$

hence b divides a. On the other hand, we have that

$-2=(-1)\cdot2$

which tells us that a divides b. Moreover, $a=2 \neq -2=b$ .

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3 years ago