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3 years ago

I need help answering all the questions plz

Mathematics

1 answer:

Natali [406]3 years ago

4 0

The width is basically the diameter, and all you have to do is divide by 2 to get the radius.B is the name for base. I think the formula for a triangle is 1/2 bh. and for the circle c=pieD i hope that helped!

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3x+4y=17

Readme [11.4K]

A) 3x+4y=17
B) -4x-3y=-18 Multiplying B) by .75
B) -3x -2.25y= -13.5 then adding this to A
A) 3x + 4y = 17
1.75y = 3.5
y = 2

A) 3x + 4*2 = 17
3x + 8 = 17
3x = 9
x = 3

(3,2)

5 0

3 years ago

Find the value of the combination

scoray [572]

=1 I calculated the combine value

6 0

3 years ago

Seven less than an unknown number

Sauron [17]

Answer:

x-7

Step-by-step explanation:

unknown number = x

7 0

3 years ago

Wires manufactured for use in a computer system are specified to have resistances between .12 and .14 ohms. The actual measured

White raven [17]

Answer: a) 0.9544996

b) 0.9999366

Step-by-step explanation:

Given : The actual measured resistances of wires produced by company A have a normal probability distribution with mean $\mu=0.13$ ohm and standard deviation $s=0.005$ ohm.

Wires manufactured for use in a computer system are specified to have resistances between .12 and .14 ohms.

Let x be the random variable that represents the value of resistance in wires.

Using formula for z-score , $z=\dfrac{x-\mu}{s}$

The z-value at x= 0.12 will be

$z=\dfrac{0.12-0.13}{0.005}=-2$

The z-value at x= 0.14 will be

$z=\dfrac{0.14-0.13}{0.005}=2$

The p-value : $P(-2$

$=0.9772498-(1-P(z$

Hence, the probability that a randomly selected wire from company A’s production will meet the specifications = 0.9544996

b) Sample size : n= 4

Using formula for z-score , $z=\dfrac{x-\mu}{\dfrac{s}{\sqrt{n}}}$

The z-value at x= 0.12 will be

$z=\dfrac{0.12-0.13}{\dfrac{.005}{\sqrt{4}}}=-4$

The z-value at x= 0.14 will be

$z=\dfrac{0.14-0.13}{\dfrac{.005}{\sqrt{4}}}=4$

The p-value : $P(-4$

$=0.9999683-(1-P(z$

The probability that all four in a randomly selected system will meet the specifications = 0.9999366

3 0

3 years ago

Evaluate the function f(x)=5-3x when x=-1 and 3

damaskus [11]

Answer:

f(-1)=8

f(3)=-4

Step-by-step explanation:

when x equals -1 you substitute -1 for x in the equation which would look like 5-3(-1) which you would then multiply -3 by -1 and get 3 which 5+3 would equal 8 so f(-1) equals 8

When x equals 3 you substitute 3 for x in the equation which would look like 5-3(3) which you would then multiply -3 by 3 which would give you 5-9 which equals -4 so f(3) equals -4

8 0

3 years ago