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3 years ago

I need help and this is due tonight (lots of questions incoming)

Mathematics

1 answer:

Sunny_sXe [5.5K]3 years ago

7 0

Answer:

bbbbb

Step-by-step explanation

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What are 3 ratios that are equivalent to 18:4

MAXImum [283]

Try 9:2 and 3:1 but I'm not sure if that's right or not

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3 years ago

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What does difference of squares mean? How can you recognize it when looking at an expression?

ki77a [65]

It is called a difference of squares because there are two things squared being subtracted. You can recognize it when there are two terms, subtraction between the two of them, and you know the square root of both

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3 years ago

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Data on pull-off force (pounds) for connectors used in an automobile engine application are as follows:

hjlf

Answer:

a) 75.62

b) 75.2

Step-by-step explanation:

Data provided:

79.9,75.1,78.2,74.1,73.9,75.0,77.6,77.3,73.8,74.6,75.5,74.0,74.7,75.9,72.6,73.8,74.2,78.1,75.4,76.3,75.3,76.2,74.9,78.0,75.1,76.8

Sum = 1966.3

Total number of observations, n = 26

a) Mean is given as:

Mean = $\frac{\textup{Sum of all observations}}{\textup{Total number of observations}}$

Mean = $\frac{\textup{1966.3}}{\textup{26}}$

Mean = 75.62

b) For value that separates the weakest 50% of the connectors i.e median or the 50th percentile

Arranging the data in ascending order:

72.6, 73.8, 73.8, 73.9, 74, 74.1, 74.2, 74.6, 74.7, 74.9, 75, 75.1, 75.1, 75.3, 75.4, 75.5, 75.9, 76.2, 76.3, 76.8, 77.3, 77.6, 78, 78.1, 78.2, 79.9

i = $\frac{\textup{n}}{\textup{2}}$

i = $\frac{\textup{26}}{\textup{2}}$ = 13

When the number of observations is even the formula for median is:

$Median = \frac{\frac{n}{2}+\frac{n+2}{2}}{2}$

$Median = \frac{\frac{26}{2}+\frac{26+2}{2}}{2}$

$Median = \frac{13th+14th}{2}$

$Median = \frac{75.1+75.3}{2}$

Median = 75.2

7 0

3 years ago

Find the solution of this system of equations x-8y=21 and 3x--8y=15

devlian [24]

If you would like to find the solution of the system of equations, you can do this using the following steps:

x - 8y = 21 /*(-3)
3x - 8y = 15
______________
-3x + 24y = -63
<span>3x - 8y = 15
</span>______________
-3x + 24y + 3x - 8y = -63 + 15
16y = -48 /16
y = -48/16
y = -3

<span>x - 8y = 21
</span>x = 21 + 8y
x = 21 + 8 * (-3)
x = 21 - 24
x = -3

(x, y) = (-3, -3)

The correct result would be (-3, -3).

7 0

3 years ago

PLS ANSWER ASAP

rosijanka [135]

Answer:

7/16

Step-by-step explanation:

4 0

4 years ago