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2 years ago

Please select the best answer from the choices provided

Mathematics

1 answer:

FromTheMoon [43]2 years ago

6 0

Answer:

$\sqrt{122}$

Step-by-step explanation:

Given that,

Vector n = 4i-j

Vector m = 3i+3j

We need to find the value of m+2n.

Put all the values,

m+2n = (3i+3j)+2(4i-j)

= (3i+3j)+8i-2j

=11i+j

Magnitude of vector,

$|m+2n|=\sqrt{11^2+1^2} \\\\=\sqrt{121+1}\\\\=\sqrt{122}$

So the correct option is (c).

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Chicken cuties are on sale for 3.48 per pound How much will it cost to but 3.5 pounds

kramer

3.48 for 1 pound

You can put it in comparison,

3.48 / 1 = x / 3.5

And then cross-multiply it,
1x = 3.48 x 3.5
x = 12.18

5 0

2 years ago

Help please help me I need this

mixer [17]

Answer:

$\frac{5+-\sqrt{53} }{2}$

Step-by-step explanation:

in the equation given these are the values:

a=1 b= -5 c= -7

if we plug this in the quadratic formula $\frac{-(-5)+-\sqrt{(-5)^2-4(1)(-7)} }{2(1)}$

this is simplified to $\frac{5+-\sqrt{53} }{2}$

hope this helped

3 0

3 years ago

"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

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3 years ago

Find a parameterization for the curve y=8−4x3 that passes through the point (0,8,4) when t=−1 and is parallel to the xy-plane.

Dima020 [189]

We Need more info please us at brainly would like you to provide more information so we can answer your question right away thank you have a goodnight

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3 years ago

Find the largest odd number that divides the product of 16*24*60 evenly

melisa1 [442]

Odd = odd × odd

Prime factor
<span>16*24*60
(4*4)(3*8)(6*10)
(2*2*2*2)(3*2*2*2)(3*2*5*2)

multiple all the odd prime factors together
3*3*5 = 45
</span>

6 0

3 years ago