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jonny [76]
3 years ago
12

3(5y - 42) for y = 4

Mathematics
2 answers:
liberstina [14]3 years ago
6 0

Answer:

-66

Step-by-step explanation:

y = 4

3(5y - 42)

3(5(4) - 42)

3(20 - 42)

3(-22) = -66

NemiM [27]3 years ago
3 0

Answer:

-66

Step-by-step explanation:

3(5×4-42)

(5×4)=20

3(20-42)

(20-42)=22

3(22)=66

so it's -66

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side^2 = 100

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Solve this quadratic equation using the quadratic formula. 5 - 10x - 3x2 = 0
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Answer:

x = (-5 ± 2√10) / 3

Step-by-step explanation:

5 − 10x − 3x² = 0

Write in standard form:

-3x² − 10x + 5 = 0

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x = [ -b ± √(b² − 4ac) ] / 2a

x = [ -(-10) ± √((-10)² − 4(-3)(5)) ] / 2(-3)

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Find the radius of a circle with a area of 212 squared
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The scatterplot shows the ages and finishing times of seven men who ran a charity 5K run. Use the labeled points to create a lin
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Answer:

0.47x + 7.72

Step-by-step explanation:

We have to create a Linear model using the given two points on the graph. The two points are: (21, 17.5) and (43, 2.75)

The general equation of the line in slope intercept form is

y = mx + c

where m is the slope and c is the y-intercept.

Calculating the slope:

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Using the value of m in above equation we get:

y = 0.47x + c

Calculating the y-intercept:

Using any of the given points we can calculate the value of c. Using the point (21, 17.5) in the above equation, we get:

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Therefore, the equation is:

y = 0.47x + 7.63

Hence option a is the correct answer. The slight change in the value of "c" is because of rounding the value of m to 2 decimal places.

So from the given options, the correct answers is:

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