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Lyrx [107]
3 years ago
5

Gabe invested $350 in baseball cards. If he lost d dollars when he sold the cards, which expression represents the amount of mon

ey he received for his baseball cards
Mathematics
2 answers:
Gnom [1K]3 years ago
7 0

Answer:

350-d

Step-by-step explanation:

350 minus the baseball cards he sold.

klemol [59]3 years ago
6 0

Answer:

350d (A)

Step-by-step explanation:

edgee

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Is sin A is 7/10 what is Cos A
viva [34]

Answer:

Cos A = (√51)/ 10

Step-by-step explanation:

sin  is opposite/hypothenuse

cos is adjacent/hypothenuse

Pythagorus theorem says that c² = a² + b²

10² = 7² + b²

b² = 100 - 49

b = ±√51

It doesn't make sense for a length to be a minus number therefore, we will use +√51.

Cos A = (√51)/ 10

Tell me if I am wrong.

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5 0
3 years ago
A study was designed to compare the attitudes of two groups of nursing students towards computers. Group 1 had previously taken
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Answer:

Kindly check explanation

Step-by-step explanation:

Given the following :

Group 1:

μ1 = 59.7

s1 = 2.8

n1 = sample size = 12

Group 2:

μ2 = 64.7

s2 = 8.3

n2 = sample size = 15

α = 0.1

Assume normal distribution and equ sample variance

A.)

Null and alternative hypothesis

Null : μ1 = μ2

Alternative : μ1 < μ2

B.)

USing the t test

Test statistic :

t = (m1 - m2) / S(√1/n1 + 1/n2)

S = √(((n1 - 1)s²1 + (n2 - 1)s²2) / (n1 + n2 - 2))

S = √(((12 - 1)2.8^2 + (15 - 1)8.3^2) / (12 + 15 - 2))

S = 6.4829005

t = (59.7 - 64.7) / 6.4829005(√1/12 + 1/15)

t = - 5 / 2.5108165

tstat = −1.991384

Decision rule :

If tstat < - tα, (n1+n2-2) ; reject the Null

tstat < t0.1,25

From t table :

-t0.1, 25 = - 1.3163

tstat = - 1.9913

-1.9913 < - 1.3163 ; Hence reject the Null

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3 years ago
Solve the linear equation x+x+2+x+4+x+6=-28<br> help!!!!!!!!!!!!!!! show work
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6 0
3 years ago
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Find the volume<br> 12 poir<br> 2.2 cm
Tanzania [10]
Answer: 26.4
To find the volume u multiply 12x2.2=26.4
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3 years ago
A natural history museum surveyed the people visiting the museum for one month and created a circle graph to show the age of the
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