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marishachu [46]
3 years ago
10

What’s 2(2a+ 3b - 4) if a=2 and b=3

Mathematics
1 answer:
Aleksandr [31]3 years ago
5 0

Answer:

2 ( 2a + 3b - 4)

Putting the value of a= 2 and b = 3 in the equation

2( 2(2) + 3(3) -4)

2 (4 + 9 -4)

2( 4 -4 + 9)

2 (0 + 9)

2 (9)

2 × 9

18

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Explain how to determine if you have a direct variation or proportional relationship
neonofarm [45]

Answer:

straight line that passes through the origin

Step-by-step explanation:

Two variables are said to have a direct variation or proportional relationship if it can be represented by y = kx, where k is a constant.

Comparing this with the equation of a straight line y = mx + b, where m is the slope of the line and b is the y intercept (value of y when x = 0), We can tell if the say that the graph of a direct variation or proportional relationship is a straight line with no y intercept (b = 0, that is it passes through the origin).

8 0
3 years ago
PLEASE HELP ASAP!!
Angelina_Jolie [31]

Answer:

57

Step-by-step explanation:

EGB and EHD are the same angles.

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2 years ago
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One bag of mulch covers a 1 3/4 yard section of Hailey's garden. If her garden is 10 3/5 yards in size, how many bags of mulch d
erastovalidia [21]

Answer:

7 bag of mulch cover will be needed for Hailey's garden.

Step-by-step explanation:

6*1 3/4 = 10.5 but it some left over for 7 will be needed .

6 0
3 years ago
4r+9r-11r+7r= Simplify Combine like terms
Veseljchak [2.6K]

Answer:

9r

Step-by-step explanation:

4r+9r-11r+7r

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13r -11r+7r

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3 years ago
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Answer the question for a normal random variable x with mean μ and standard deviation σ specified below. (Round your answer to o
vladimir2022 [97]

Answer:

x = 63.6

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X and also the area to its left. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X, which is the area to its right.

In this problem, we have that:

\mu = 38, \sigma = 11

Find a value of x that has area 0.01 to its right

This is x when Z has a pvalue of 1-0.01 = 0.99. So it is X when Z = 2.3267.

Z = \frac{X - \mu}{\sigma}

2.3267 = \frac{X - 38}{11}

X - 38 = 11*2.3267

X = 63.6

So x = 63.6

6 0
3 years ago
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