All categories

3 years ago

Kinda confused on this one, someone help please!

Mathematics

2 answers:

Leno4ka [110]3 years ago

7 0

As x increases from 0 to 1, y decreases from 89 to 55. This could happen if 89 were multiplied by the rate of change factor 0.62: 0.62(89) = 55. Likewise, if we mult. 55 by 0.62, we get 34, which also agrees with the table values for y.

Thus, this is an example of exponential decay, with decay constant 0.62.

trapecia [35]3 years ago

4 0

To determine which type of graph this is, look at the estimated population, and look at the differences between each point:

89, 55, 34, 21, 13

Differences: 34, 21, 13, 8

The differences are all different values, so linear can be removed.

Because the graph is decreasing at a rate, we can eliminate both quadratic answers, as they would have increasing values.

The answer is 'exponential; y = 89 * 0.62^x'.

You might be interested in

Factor x2+12x+35 , I appreciate all the kind generous help I can receive

ANTONII [103]

X2+12x+35 should be written as <span>x^2+12x+35, where "^"
denotes exponentiation.

Since the coefficient of the x^2 term is 1, we can focus on 35, finding its factors. Note that 35 = 1*35, 5*7. Also note that 5+7 = 12.

Thus, </span>x^2+12x+35 can be re-written as (x+5)(x+7). As a check, multiply 5 and 7; you get 35, which matches the original <span>x^2+12x+35. Then add 5x to 7x, obtaining 12x, which also matches.</span>

4 0

3 years ago

Read 2 more answers

klaus was replacing the roof on his house. He used 420 nails to attach al the pieces of wood. Each piece of wood needed 7 nails

hjlf

There were 20 pieces of wood left.

Work:

420 ÷ 7 = 60

60 - 40 = 20

Your answer is 20.

Hope this helps!

6 0

3 years ago

At a school, 40% of sixth grade students said that hip-hop is their favorite kind of music. If 100 sixth grade students prefer h

valina [46]

60 kids like hip hop

7 0

3 years ago

Read 2 more answers

Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s). Consider the eq

Deffense [45]

To solve for x in terms of b, simply treat b as a number, and solve for x as usual: first of all, we expand the left hand side:

$-2bx+10 = 16$

Subtract 10 from both sides:

$-2bx = 6$

Divide both sides by -2b:

$x = \cfrac{6}{-2b} = \cfrac{-3}{b}$

This means that in particular, if we set $b= 3$ , we have

$x = \cfrac{-3}{3} = -1$

5 0

3 years ago

H(x) = x4+ 2x3- 10x2 -18x+9

vichka [17]

Let's group the cubic function: $h(x)=x^4+2x^3-10x^2-18x+9=(x-3)(x+3)(x^2+2x-1)$ .

The first two roots are $\pm3$ however to find the last two roots we need to solve the square equation:

$x^2+2x-1=0
\\D=b^2-4ac=2^2-4\cdot1\cdot(-1)=8$ . Now we know the discriminator, using the discriminator we're able to find the roots of the equation: $x_{1,2}=\frac{-b\pm\sqrt{D}}{2a}=\frac{-2\pm\sqrt{8}}{2}=\frac{-2\pm2\sqrt{2}}{2}=\frac{2(\sqrt{2}\pm1)}{2}$ . The roots of the square equation are $x_{1}=-1-\sqrt{2}$ and $x_{2}=\sqrt{2}-1$ .

The roots of the cubic function are $\pm3$ , $-1-\sqrt{2}$ and $\sqrt{2}-1$ .

5 0

3 years ago

Read 2 more answers