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Ipatiy [6.2K]
2 years ago
8

Why is subtracting an expression similar to distributing a –1?

Mathematics
2 answers:
Gre4nikov [31]2 years ago
8 0

Answer: i think D

Step-by-step explanation:

Stels [109]2 years ago
7 0
The answer is …


Answer is C
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Simplify 4x5p:)<br> thanks whoever answers receives points
bazaltina [42]

Answer:

20xp

Step-by-step explanation:

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2 years ago
Read 2 more answers
Select the scenario below that demonstrates sampling bias. Select the correct answer below:
Vsevolod [243]

Answer:

C. Elizabeth wants to estimate the mean vacation days of coworkers at her company. She collects data by selecting a random group of coworkers within her department.

Step-by-step explanation:

Sampling Bias is case, in which some section of population have higher or lower chance of being selected in sample than others.

'Elizabeth wants to estimate the mean vacation days of coworkers at her company. She collects data by selecting a random group of coworkers within her department'. This case is of Convenience Sampling, where person selects sample only as per his/ her convenience.

Elizabeth has conveniently chosen sample workers from her department, so they have higher chance of being in sample, others have lesser chance.  Hence, this is Sampling Bias

7 0
3 years ago
The Millers plan on retiring soon. When they were first married they purchased 1,000 shares in a mutual fund that was at that ti
Degger [83]

Answer: 6.8%

Step-by-step explanation:

We need to find both percentage so we can determine the increase.

Finding percentage of $10 return: 1% return

Finding percentage of $78 return: 7.8% return

To find the percent increase we do 7.8%-1.0% = 6.8%

7 0
3 years ago
Let T be the plane-2x-2y+z =-13. Find the shortest distance d from the point Po=(-5,-5,-3) to T, and the point Q in T that is cl
GaryK [48]

Answer:

d=10u

Q(5/3,5/3,-19/3)

Step-by-step explanation:

The shortest distance between the plane and Po is also the distance between Po and Q. To find that distance and the point Q you need the perpendicular line x to the plane that intersects Po, this line will have the direction of the normal of the plane n=(-2,-2,1), then r will have the next parametric equations:

x=-5-2\lambda\\y=-5-2\lambda\\z=-3+\lambda

To find Q, the intersection between r and the plane T, substitute the parametric equations of r in T

-2x-2y+z =-13\\-2(-5-2\lambda)-2(-5-2\lambda)+(-3+\lambda) =-13\\10+4\lambda+10+4\lambda-3+\lambda=-13\\9\lambda+17=-13\\9\lambda=-13-17\\\lambda=-30/9=-10/3

Substitute the value of \lambda in the parametric equations:

x=-5-2(-10/3)=-5+20/3=5/3\\y=-5-2(-10/3)=5/3\\z=-3+(-10/3)=-19/3\\

Those values are the coordinates of Q

Q(5/3,5/3,-19/3)

The distance from Po to the plane

d=\left| {\to} \atop {PoQ}} \right|=\sqrt{(\frac{5}{3}-(-5))^2+(\frac{5}{3}-(-5))^2+(\frac{-19}{3}-(-3))^2} \\d=\sqrt{(\frac{5}{3}+5))^2+(\frac{5}{3}+5)^2+(\frac{-19}{3}+3)^2} \\d=\sqrt{(\frac{20}{3})^2+(\frac{20}{3})^2+(\frac{-10}{3})^2}\\d=\sqrt{\frac{400}{9}+\frac{400}{9}+\frac{100}{9}}\\d=\sqrt{\frac{900}{9}}=\sqrt{100}\\d=10u

7 0
3 years ago
Sin40°-sin20°/cos220°-cos200=√3​
Mumz [18]

Answer:

1.7320508

Step-by-step explanation:

7 0
2 years ago
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