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3 years ago

You have been asked to set up chairs for the school concert.

Mathematics

1 answer:

DanielleElmas [232]3 years ago

5 0

Step-by-step explanation:

middle section= 390

sides=270

total=930 chairs

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Which formula is used to calculate the standard deviation of sample data?

Reptile [31]

Answer:

Standard deviation (S) = square root of the variance

Standard deviation is the measure of spread most commonly used in statistical practice when the mean is used to calculate central tendency. Thus, it measures spread around the mean

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Solve this system of linear equations. Separate the x- and y- values with a comma.

liubo4ka [24]

Answer:

(-1,4)

Step-by-step explanation:

Using elimination, add the two equations to get rid of the y variable.

17x = 43 - 15y

+8x = -68 + 15y

=25x = -25

x = -1

Now plug in -1 for x in any of the equations.

17(-1) = 43 - 15y

-17 = 43 - 15y

-60 = -15y

y = 4

6 0

3 years ago

Pls help need answer ASAP

kirza4 [7]

Answer:

y =5^x

y=78,125

if we have x=7

y=5^7

5×5×5×5×5×5×5=78,125

5 0

3 years ago

erin has 40,000 in a savings account that earns 15% interest per year. the interest is not compounded. how much will she have in

professor190 [17]

Answer:

$41500

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 15%/100 = 0.15 per year,

putting time into years for simplicity,

3 months ÷ 12 months/year = 0.25 years,

then, solving our equation

I = 40000 × 0.15 × 0.25 = 1500

I = $ 1,500.00

The simple interest accumulated

on a principal of $ 40,000.00

at a rate of 15% per year

for 0.25 years (3 months) is $ 1,500.00.

7 0

3 years ago

of 360 consumers polled some purchase ice cream some purchase frozen yogurt and some purchase both if 260 people polled purchase

uysha [10]

Answer: There are 350 consumers who purchase frozen yogurt.

Step-by-step explanation:

Since we have given that

Number of consumers polled =360

Number of consumers who purchased ice- cream = 260

Number of consumers who purchased both ice- cream and frozen yogurt = 250

We need to find the number of consumers who purchased frozen yogurt,

Let A denotes who purchased ice-cream

and B denotes who purchased frozen yogurt.

As we know the formula

$n(A\cup B)=n(A)+n(B)-n(A\cap B)\\\\360=260+n(B)-250\\\\360=10+n(B)\\\\360-10=n(B)\\\\350=n(B)$

Hence, there are 350 consumers who purchase frozen yogurt.

4 0

3 years ago