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3 years ago

What type of

Mathematics

2 answers:

kotykmax [81]3 years ago

6 0

Answer:

COMMON DIFFENCES

Step-by-step explanation:

NOT FOR SURE

fgiga [73]3 years ago

3 0

Its x3 each time 3x6 3x9 and so on and it goes for both

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A car moving east at 45km/hr turns and travels west at 30km/hr. What is the magnitude and direction of the change in velocity?

madam [21]

(-30 km/h) -(45 km/h) = -75 km/h . . . . . east is positive here

The velocity changed 75 km/h to the west.

3 0

3 years ago

A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample informa

Misha Larkins [42]

Answer: V(X) = 0.96

Step-by-step explanation: <u>Variance</u> is defined as the average of the squared difference from the sample or population mean.

For a discrete frequency distribution is calculated following the steps:

1) Determine expected value or mean:

$E(X)=\frac{\Sigma xf}{\Sigma f}$

$E(X)=\frac{0(700)+1(900)+2(600)+3(300)}{2500}$

E(X) = 1.2

2) Multiply frequency and the squared difference of x and expected value:

$f(x-E(X))^{2}$

$700(0-1.2)^{2}=1008\\900(1-1.2)^{2} = 36\\600(2-1.2)^{2} = 384\\300(3-1.2)^{2} = 972$

3) Add them:

$\Sigma [f(x-E(X))^{2}]$ = 1008 + 36 + 384 + 972 = 2400

4) Divide the sum per frequency total:

$V(X)=\frac{\Sigma [f(x-E(X))^{2}]}{\Sigma f}$

$V(X)=\frac{2400}{2500}$

V(X) = 0.96

The variance of the number of cups of coffee is <u>0.96</u>.

7 0

3 years ago

Solve 10 ^(2x+9)=290 Express in terms of natura logarithms

GenaCL600 [577]

Use following log property:
$ln( a^n) = n ln (a)$

Take log of both sides
$ln (10^{2x+9}) = ln (290) \\ \\ (2x+9) ln (10) = ln (290)$

Distribute left side, isolate 'x'
$2 ln (10) x + 9 ln(10) = ln (290) \\ \\ x = \frac{ln (290) - 9 ln(10)}{2 ln(10)}$

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4 years ago

What is the value of x

masha68 [24]

42...But try to get another answer though because I’m not 100 percent correct

4 0

3 years ago

A family of two adults and three children went to a water park. Admission to the water park costs $18 per person. Nora used the

horsena [70]

Answer: distributive property

Step-by-step explanation:

$5(18)=2(18)+3(18)$