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3 years ago

Help me out plz I need an answer

Mathematics

2 answers:

weeeeeb [17]3 years ago

7 0

The correct answer is B
Hope this helped :)

solong [7]3 years ago

6 0

Slope = (5+3)/(-2-2) = 8/-4 = -2

answer slope = -2 (B) second choice

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(x^2−1)(3x−4)(3x+4) what is the product

Andrei [34K]

Answer:

9x^4-25x^2+16

Step-by-step explanation:

(x^2−1)(3x−4)(3x+4)=(*)

(x^2−1)((3x)^2−4^2) =

(x^2 - 1)(9x^2-16)=

x^2*9x^2 - x^2*16 - 1*9x^2 +16=

9x^4-16x^2-9x^2+16=

9x^4-25x^2+16

(*) (A-B)(A+B) =A^2 - B^2

6 0

3 years ago

Please show your work please

Nadusha1986 [10]

The correct answer is 4.

5 0

3 years ago

The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consume

AfilCa [17]

Answer:

Yes. The male and female consumers differ in the amounts they spend.

Step-by-step explanation:

We can express the null and alternative hypothesis as:

$H_0: \mu_m=\mu_w\\\\H_1: \mu_m\neq\mu_w$

It is assumed a significance level of 0.05.

The standard deviation of the difference of means is calculated as:

$s=\sqrt{\frac{s_m^2}{n_m} +\frac{s_w^2}{n_w} } =\sqrt{\frac{35^2}{40} +\frac{20^2}{30} } =\sqrt{30.625+13.333} =\sqrt{43.958} =6.63$

The test statistic is

$t=\frac{(M_m-M_w)-0}{s}=\frac{135.67-68.64}{6.63}=10.11$

The degrees of freedom are:

$df=n_1+n_2-2=40+30-2=68$

The P-value for t=10.11 is P=0, so it is smaller than the significance level. The null hypothesis is rejected.

We can conclude that male and female consumers differ in the amounts they spend.

5 0

4 years ago

Need your Help please!!

lianna [129]

Answer:

f(x) = (x + 2)(x + 1)(x - 3) = x^3 - 7·x - 6

a = 0 ; b = -7 ; c = -6

a = -3 ∧ b = -2 ∧ c = -3

3 0

3 years ago

Find the value of the expression: <br><br> p^2q^2+pq–q^3–p^3 for p=1 and q=−1

Basile [38]

Answer:

Step-by-step explanation:

(1)^2(-1)^2 +(1)(-1) -(-1)^3 -(1)^3

= 1·1 -1 -(-1) -1

= 1 - 1 + 1 - 1 = 0

4 0

3 years ago