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const2013 [10]
2 years ago
5

I need help with (-2.3) * 4.7

Mathematics
1 answer:
kykrilka [37]2 years ago
8 0

(-2.3)*4.7 would be equal to -10.81

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1. If a = -1 , the value of3a + 1 is ​
erastovalidia [21]

Answer:

f(a) = 3a + 1 \\ Now,\: a =  - 1 \\ f( - 1) = 3( - 1) + 1 \\ f( - 1) =  - 3 + 1 \\ \boxed{ f( - 1) =  - 2}

  • Therefore, <em><u>-2</u></em> is the right answer.
6 0
2 years ago
Brain is solving the equation x^2 - 3/4x = 5. What value must be added to both sides of the equation to make the left side a per
katrin2010 [14]
To make a square for x²+bx=c, add( \frac{1}{2} b)²on both side
in this case, b is-3/4, half of b is -3/8, and (-3/8)² is 9/64, so you add 9/64 to both side. 
6 0
3 years ago
What is the slope of the line that passes through the points (3, -4) and (7, 4)?
Andrews [41]
The correct option is: Option (C) 2

Explanation:

The slope formula is = m = \frac{y_2 - y_1}{x_2 - x_1}

Insert the values in the above formula:

m = \frac{4 - (-4)}{7 - 3} =  \frac{8}{4} = 2

Which is Option (C).
6 0
3 years ago
The Gateway Arch in St. Louis can be modeled by y=-2/315(x+315) (x-315) where x and y are measured in feet. The x-axis represent
Pani-rosa [81]

Answer:

USE SOCRACTIC IT WOULD REALLY HELP

4 0
3 years ago
a pollster wishes to estimate the proportion of united states voters who favor capital punishment. how large a sample is needed
olasank [31]

The sample size must be 543 so the sample proportion is will not differ by 5%

We are given the following in the question:

Margin of error = 5%

Confidence interval:

p ±z√(p'(1 - p')/n)

Margin of error =

p = ±z√(p'(1 - p')/n)

Since no particular proportion is given, we take

p' = 0.5

Z critical at α 0.02 is ± 2.33

Putting values, we get,

p = ±z√(p'(1 - p')/n)

2.33 x √(0.5(1 - 0.5)/n)

√n = 2.33x 0.5/0.05

n = 542.89 = 543

Thus, the sample size must be 543 so the sample proportion is will not differ by 5%

To learn more about confidence interval refer here

brainly.com/question/15712887

#SPJ4

3 0
1 year ago
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