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2 years ago

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Mathematics

1 answer:

worty [1.4K]2 years ago

8 0

Answer:

a=2.4

b=13.9

c= -8.1

Step-by-step explanation:

a= 3-0.6= 2.4

b= 12.5-(-1.4)= 13.9

c= -5.2-2.9= -8.1

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inysia [295]

Answer:

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Step-by-step explanation:

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2 years ago

The sample consisted of 50 night students, with a sample mean GPA of 3.02 and a standard deviation of 0.08, and 25 day students,

bulgar [2K]

Answer: The test statistic is t= -0.90.

Step-by-step explanation:

Since we have given that

n₁ = 50

n₂ = 25

$\bar{x_1}=3.02\\\\\bar{x_2}=3.04\\\\\sigma_1=0.08\\\\\sigma_2=0.06$

So, s would be

$s=\sqrt{\dfrac{n_1\sigma_1^2+n_2\sigma_2^2}{n_1+n_2-2}}\\\\s=\sqrt{\dfrac{50\times 0.08^2+25\times 0.06^2}{50+25-2}}\\\\s=0.075$

So, the value of test statistic would be

$t=\dfrac{\bar{x_1}-\bar{x_2}}{s(\dfrac{1}{n_1}+\dfrac{1}{n_2})}\\t=\dfrac{3.02-3.04}{0.074(\dfrac{1}{50}+\dfrac{1}{25})}\\\\t=\dfrac{-0.04}{0.074(0.02+0.04)}\\\\t=\dfrac{-0.04}{0.044}\\\\t=-0.90$

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3 years ago

A baseball field is being constructed. The builders noticed that the batters would have the sun in their eyes when batting from

Leona [35]

Answer:

$A' =(-y,x)$

Step-by-step explanation:

Given

Represent point A as thus;

$A = (x,y)$

Required

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When a point is rotated counterclockwise, we start by switching the positions of x and y as follows:

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2 years ago

The product of w and 2 is greater than or equal to 19.

madam [21]

Equation Form:

w x 2 $\geq$ 19

Divide both sides by 2:

w $\geq$ 9.5

So, w must be equal to or greater than 9.5 for this equation to work.

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2 years ago

Safiya deposited money into a bank account that earned 6.5% simple interest each year. After 312 years, she had earned $36.40 in

Svetllana [295]

Answer: If the time is 3 1/2 years (most reasonable assumption)

Her initial deposit was $160

Step-by-step explanation: The basic formula for simple interest is

<em>i = prt i </em>is interest, P is principal (deposit) r is the percentage (converted to a decimal) and t is time, the number of years.

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3 years ago

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