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3 years ago

What is mU? A. 17 B. 29 C. 46 D. 134

Mathematics

1 answer:

Andrei [34K]3 years ago

3 0

Answer:

I think its A

Step-by-step explanation:

because it's a tighter angle than 29,46,and 134 degrees i might not be right but i hope it is :)

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The school is having a bake sale and the math club is bringing cupcakes. They have 180 total cupcakes, both chocolate and strawb

jeka57 [31]

Let $s$ be the number of strawberry cupcakes, and $c$ the number of chocolate cupcakes.
From our problem we know that the total number of cupcakes is 180, so $c+s=180$ . We also know that the number of chocolate cupcakes is eighteen more than twice the number of strawberry cupcakes, so $c-18=2s$ , or solving for $c$ : $c=2s+18$ .
Know we have our system of equations:
$\left \{ {{c+s=180} \atop {c=2s+18}} \right.$
We can conclude that the correct answer is B. c + s = 180 c = 2s + 18.

Lets solve our equations to find how many cupcakes of each they have:
from our second equation we know that $c=2s+18$ ; lets replace that value in our first equation to find the number of strawberry cupcakes:
$2s+18+2=180$
$3s=162$
$s= \frac{162}{3}$
$s=54$
Now that we know the number of strawberry cupcakes, lets replace that value in our second equation to find the number of chocolate cupcakes:
 $c=2(54)+18$
$c=108+18$
$c=126$
As a bonus, we can conclude that the math club have 126 chocolate cupcakes and 54 strawberry cupcakes.

8 0

3 years ago

Read 2 more answers

Between which two rational numbers is located?

yarga [219]

Square root 3 is approximately equivalent to 1.732 therefore the answer would be B.

4 0

4 years ago

16. From past experience, a company has found that in cartons of transistors, 92% contain no defective transistors, 3% contain o

Lynna [10]

Answer:

E(x)=0.15

V(x)=0.3075

S(x)=0.5545

Step-by-step explanation:

The mean of a discrete variable is calculated as:

$E(x)=x_1*p(x_1)+x_2*p(x_2)+...+x_n*p(n)$

where $x_1,x_2,...,x_n$ are the values that the variable can take and $p(x_1),p(x_2),...,p(x_n)$ are their respective probabilities.

So, if we call x the number of defective transistors in cartons, we can calculate the mean E(x) as:

$E(x)=(0*0.92)+(1*0.03)+(2*0.03)+(3*0.02)=0.15$

Because there are 0 defective transistor with a probability of 0.92, 1 defective transistor with a probability of 0.03, 2 defective transistors with a probability of 0.03 and 3 defective transistors with a probability of 0.01.

At the same way, the variance V(x) is calculated as:

$V(x)=E(x^2)-(E(x))^2$

Where $E(x^2)=x_1^2*p(x_1)+x_2^2*p(x_2)+...+x_n^2*p(n)$

So, the variance V(x) is equal to:

$E(x^2)=(0^2*0.92)+(1^2*0.03)+(2^2*0.03)+(3^2*0.02)=0.33\\V(x)=0.33-(0.15)^2\\V(x)=0.3075$

Finally, the standard deviation is calculated as:

$S(x)=\sqrt{V(x)} \\S(x)=\sqrt{0.3075} \\S(x)=0.5545$

8 0

3 years ago

Read 2 more answers

I’m I right? If not change it for me

dangina [55]

The first and third are correct. They are equal.

The second is incorrect. This is because 1800 meters = 1.8 km (not 18 km). The answer you should have is a "less than sign" because 1.8 km is smaller than 18 km.

To go from meters to kilometers, you move the decimal point 3 spots to the left. This is the same as dividing by 1000.

To go from kilometers to meters, you move the decimal point 3 spots to the right. This is the same as multiplying by 1000.

8 0

3 years ago

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Okay I told me it was two plus two please

nignag [31]

two plus two is four

2+2=4

8 0

4 years ago