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3 years ago

Hello Please help me.

Mathematics

1 answer:

Mama L [17]3 years ago

4 0

A because the rest are just adding or multiplying

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Determine which consecutive integers do not have a real zero of f(x) = x^3+5x^2 -x -6 between them.

Verdich [7]

Answer:

(-6, -5).

Step-by-step explanation:

If there is a zero between the integers there will be a change of sign of f(x).

x^3 + 5x^2 - x - 6

f(1) = 1 + 5 - 1 - 6 = -1

f(-1) = -1 + 5 + 1 - 6 = -1

f(2) = 8 + 20 - 2 -6 = 20

There' a change of sign between f(1) and f(2) so there is a zero between (1, 2).

f(-2) = -8 + 20 + 2 - 6= 6

So there is also a zero between -1 and -2. (-2, -1)

F(-4) = 14, f(-5) = -1 = change of sign so there is also a zero in (-5,-4)

f(-6) = -36 - no change in sign between -5 and -6.

7 0

3 years ago

5/9 is rational or irrational

Elenna [48]

Rational hope this helps

8 0

3 years ago

A batch of 40 parts contains six defects. If two parts are drawn randomly one at a time without replacement, what is the probabi

adell [148]

Answer:

a) Therefore, the probability is P=1/52.

b) Therefore, the probability is P=9/400.

Step-by-step explanation:

We know that a batch of 40 parts contains six defects.

a) We calculate the probability that the both parts are defective, if two parts are drawn randomly one at a time without replacement.

The probability for the first is 6/40.

The probability for the second is 5/39.

We get:

$P=\frac{6}{40}\cdot \frac{5}{39}\\\\P=\frac{1}{52}$

Therefore, the probability is P=1/52.

b) We calculate the probability that the both parts are defective, if two parts are drawn randomly one at a time with replacement.

The probability for the first is 6/40.

The probability for the second is 6/40.

We get:

$P=\frac{6}{40}\cdot \frac{6}{40}\\\\P=\frac{9}{400}$

Therefore, the probability is P=9/400.

6 0

3 years ago

CeeCee recorded the number of necklaces for sale at 10 different locations and then arranged the numbers from smallest to larges

serg [7]

The answer is 2.2. that means it's c.

Hope this helped☺☺

4 0

3 years ago

Amy cut 32 ft of chain into pieces that were each 1/4 ft long. How many of these did Amy have after cutting the chain?

agasfer [191]

128 pieces can be made after cutting the chain

Solution:

Given that, Amy cut 32 ft of chain into pieces that were each 1/4 ft long

To find: Number of pieces after cutting the chain

From given,

$\text{Total length of chain } = 32 \text{ feet }\\\\\text{Length of 1 piece } = \frac{1}{4} \text{ feet }$

Thus the number of pieces after cutting the chain can be found by dividing the total length of chain by length of 1 piece

$\text{Number of pieces} = \frac{\text{Total length of chain}}{\text{Length of 1 piece }}$

Substituting the values, we get

$\text{Number of pieces} = \frac{32}{\frac{1}{4}}\\\\\text{Number of pieces} = 32 \times 4 = 128$

Thus 128 pieces can be made after cutting the chain

8 0

3 years ago