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2 years ago

What are the possible values of x if (4x – 5)2 = 49? check all that apply. -4/5 -1/2 3 5 7

Mathematics

2 answers:

dexar [7]2 years ago

9 0

4 x - 5 = - 7
4 x = - 2
x = - $\frac{1}{2}$
or
4 x - 5 = 7
4 x = 12
x = 3
Answer B) and C)

fenix001 [56]2 years ago

6 0

(4x-5)^2 = 49

Extract square root from both sides

4x-5 =(+/-)7

4x = 5 +7 and 4x = 5 -7

4x = 12 and 4x = -2

x = 12/4 and x = -2/4

x= 3 and x =-1/2

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Graph the line y = kx +1 if it is known that the point M belongs to it: M(1,3)

tigry1 [53]

Answer:

$M(x,y) = (1,3)$ belongs to the line $y = 2\cdot x +1$ . Please see attachment below to know the graph of the line.

Step-by-step explanation:

From Analytical Geometry we know that a line is represented by this formula:

$y=k\cdot x + b$

Where:

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$y$ - Dependent variable, dimensionless.

$k$ - Slope, dimensionless.

$b$ - y-Intercept, dimensionless.

If we know that $b = 1$ , $x = 1$ and $y = 3$ , then we clear slope and solve the resulting expression:

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2 years ago

Sociologists want to test whether the number of homeless people in a particular urban area is increasing. In 2010, the average n

Kobotan [32]

Answer:

The test statistic value is 15.3.

Step-by-step explanation:

The hypothesis for this test is:

H₀: The average number of homeless people is not increasing, i.e. μ = 42.3.

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As the population standard deviation is provided use a single mean z-test for the hypothesis testing.

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2 years ago

Thrice of product of five and b is reduced by 2

Diano4ka-milaya [45]

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2 years ago

Estimate the value of 9.9 squared x 1.79

Helen [10]

9.9^2X1.79
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7 0

2 years ago

Read 2 more answers

How much heavier is a 9 1/8 pound box than a 2 5/6 pound box?

tatuchka [14]

So let’s simplify the given situation.
We need to find out how much heavier is 91/8 lbs. compare to 2 5/6 lbs.
Since, it’s a combination of whole number and fraction; we cannot directly subtract this given equation. We need to convert the two given number into a fraction.
9 1/8 = 8 x 9 = 72 + 1 = 73, 73 is our numerator and 8 is our denominator
=> 73/8
2 5/6 = 6 x 2 = 12 + 5 = 17, 17 is our numerator and 6 is our denominator
=> 17/6

Now, we have 2 fractions with unlike denominator. In order to get a common denominator, we have to find their least common factor.

=> 73 - 17 = 73 x 6 - 17 x 8 
 8 6 8 x 6 6 x 8
=> 438 – 136 Now, we have the same denominator, subtract
 48 48
=> 302 or 151
 48 24
=> 6 7
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Therefore 9 1/8 lbs. is 6 7/24 lbs. heavier than 2 5/6 lbs.

4 0

2 years ago