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3 years ago

Yooo im from k12 please help me rqqq!!!

Mathematics

2 answers:

Vikentia [17]3 years ago

8 0

$\\ \tt\hookrightarrow 12x^4(-56x^3y^2)$

$\\ \tt\hookrightarrow -672x^{4+3}y^2$

$\\ \tt\hookrightarrow -672x^7y^2$

None of the above

jek_recluse [69]3 years ago

3 0

$\sf \: 12x^{4} ( - 56x^{3} {y}^{2} )$

Multiplying a positive and a negative equals a negative: (+)×(-)=(-)

$\sf \: { - 12x}^{4} \times 56 {x}^{3} {y}^{2}$

Calculate the product

$\boxed{ \tt - 672x^{7} {y}^{2} }$

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Exercise 3 Iron Man is checking out a new suit that fires lasers more accurately. If he is aiming for a bullseye, his original s

Novosadov [1.4K]

Answer: (a). insufficient evidence.

(b). sufficient evidence

(c). insufficient evidence

Step-by-step explanation:

we will analyse this carefully to help us understand it better.

we have the standard deviation for the original suit = 2mm

standard deviation for new suit = 1.6mm

given n = 1.6

from the question we know that the suit with less standard deviation is better than the other suit

considering a null hypothesis;

H₀ : б ≥ 2, (here the new suit is not better than the original alternative hypothesis).

Also Hi : б < 2 (we have here that the new suit is better than the original )

using the Chi-Square distribution with n-1 degree of freedom to test the claim about the value of the standard deviation;

X² = (n-1) s²/ б² = (16-1)(1.6)² / (2)² = 9.6

taking the P value of X² (9.6) for 15 D O F from the P value table gives us

1-0.8441 = 0.1559

also ∝ = 0.05

where P-value > ∝ (0.05)

we can see from here that there is insufficient evidence to claim that new suit is better than that of the original suit, having failed to neglect H₀

(b). Given n = 100 and s = 1.6

then we have that X² = (n-1) s²/ б² = (100-1)(1.6)² / (2)² = 63.36

P-value of X² at 99 dif gives 0.0020

where ∝ = 0.05

since P value < ∝

rejecting the null hypothesis H₀,

we can safely say that there is sufficient claim that the new suit is better than the original at 95%.

(c). where we have that ∝ = 0.001

for part(b) P-values = 0.0020

given P-value > ∝ ;

we fail to neglect the null hypothesis.

From this we can say that the is insufficient evidence backing the claim thhat the new suit is better than the original suit at 99.99% confidence level.

cheers i hope this helps!!!!!

5 0

4 years ago

I feel like it’s C but I need gel to make sure it’s right help please I can’t really get any wrong on this

Flauer [41]

The answer is D. It does not satisfy the second equation because 0 is not greater than 1.

4 0

3 years ago

Answer this question ASAP

Olin [163]

Answer: start at -3 on the graph then go up one to the right 4

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

John is making baked goods for a party. He can either make muffins or bread, and he can use blueberries, bananas, apples, or cho

Margarita [4]

The total number of possible choices that John had for making baked goods for the party is 8.

<h3>What is Combination?</h3>

The combination helps us to know the number of ways an object can be arranged without a particular manner. A combination is denoted by 'C'.

$^nC_r = \dfrac{n!}{r!(n-r)!}$

where,

n is the number of choices available,

r is the choices to be made.

We know that the number of choices with John for his baked goods is only two which are muffins or bread, therefore, the choices of the baked good can be written as $^2C_1$ .

Also, the number of choices with John for flavors is four which are blueberries, bananas, apples, or chocolate chips, therefore, the choices of the flavor can be written as $^4C_1$ .