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zmey [24]
3 years ago
15

What is the value of a in the equation 3 a plus B equals 54 will be equals nine

Mathematics
1 answer:
den301095 [7]3 years ago
3 0

Answer: a = -15

Step-by-step explanation:

3a + b = 9

b=54

3a + 54 = 9

3a = 9-54

3a= -45

<h3>\frac{3a}{3}= \frac{-45}{3}\\</h3>

- x + = -

<h2>a= -15</h2>
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2 less than three times a number is the same as the number plus 10
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3x - 2 = x + 10
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3 years ago
An independent-measures research study compares three treatment conditions using a sample of n = 5 in each treatment. For this s
slavikrds [6]

Answer: c. ​10

Step-by-step explanation:

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For this study, the three sample means are, M1 = 1, M2 = 2, and M3 = 3.

Grand mean = \overline{X}=\dfrac{M1+M2+M3}{3} [All sample have equal elements]

=\dfrac{1+2+3}{3}=2

For ANOVA,

SS_{between}=n\sum(M_i-\overline{X})^2 , where i= 1, 2 , 3

SS_{between}=5((1-2)^2+(2-2)^2+((3-2)^2)

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8 0
3 years ago
What is the missing length???
Kaylis [27]

Answer:

25

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144/60 = 2.4

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8 0
2 years ago
Answer it answer it answer it
Usimov [2.4K]

Answer:

The correct option is;

C. 52.2 × 4.4 × 2 + 47.8 × 4.4 × 2

Step-by-step explanation:

The area of the square frame is the area of the inner square subtracted from the area of the outer square

Which gives;

52.2² - 47.8² = 440

Therefore;

Option A. 52.2² - 47.8² is a correct way of finding the area of the square frame

Option B. 2 × ((52.2×2.2) + (47.8×2.2)) = 440, is  a correct way of finding the area of the square frame

Option C. 52.2 × 4.4 × 2 + 47.8 × 4.4 × 2 = 880, is not a correct way of finding the area of the square frame

The error is the thickness is 2.2 not 4.4

Option D. 100×(52.2 - 47.8) = (52.2 + 47.8) × (52.2 - 47.8) = 52.2² - 47.8² = 440,  is  a correct way of finding the area of the square frame

5 0
2 years ago
If y=12 when x=3, find y when x =15 ( Y varies directly as x)​
Flauer [41]
Y = kx
when y= 12, x=3
12 = 3k
k = 12/3
k = 4

y = 4x
when x= 15
y = 4(15)
y = 60
4 0
2 years ago
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