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3 years ago

What is the unit rate of 1/7 and 1/21 ? this is very confusing?

Mathematics

1 answer:

Xelga [282]3 years ago

5 0

Answer:

the unit rate of 1/7 is itself (1/7), and for 1/21 is 1/21.

Step-by-step explanation:

this is because these rates/ratios are unit fractions. so if the numerater is 1, theres nothing you can do to simplify it.

you can check with the ceaser method as well, but you're still going to find the same solution.

plus, for example, if it takes 7 grams of sugar to make 1 cake, it wouldnt make sense for 1 gram of sugar to make 7 cakes.

hope this helped clear up your confusion <3

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Using the formula v= l x w x h find the volume of a right rectangular prism when the length of the prism is 45cm the width is 12

jeka94

V = length times width times height
V = 45 * 12 * 10
V = 5400

Hope this helps

3 0

3 years ago

Find parametric equations and symmetric equations for the line. (Use the parameter t.) The line through (3, 1, 0) and perpendicu

iren2701 [21]

Answer with Step-by-step explanation:

We are given that a point (3,1,0)

Two vectors are

A=<1,1,0>

B=<0,1,1>

$A\times B=\begin{vmatrix}i&j&k\\1&1&0\\0&1&1\end{vmatrix}$

$A\times B=i-j+k$

Let v $=A\times B=i-j+k$

$v==$

$r_0==$

$r=r_0+vt$

Substitute the values then we get

$r=+t$

$r=$

The parametric equation of the line

$x=x_0+at,y=y_0+bt,z=z_0+ct$

Using the formula

The parametric equation of the line which is passing through the point (3,1,0) and perpendicular to both i+j and j+k is given by

$x=3+t,y=1-t,z=t$

The symmetric equation of the line is given by

$\frac{x-x_0}{a}=\frac{y-y_0}{b}=\frac{z-z_0}{c}$

Using the formula

The symmetric equation of the line which is passing through the point (3,1,0) and perpendicular to both i+j and j+k is given by

$\frac{x-3}{1}=\frac{y-1}{-1}=z$

8 0

3 years ago

hey uh please explain / answer these for me <3 i know some of them but I'm just lazy-minded if u know what I mean

Sonbull [250]

Answer:

First Picture: 2032*93 = 188976, 425/25 = 17

Second Picture: the machine is dividing the number by 6

Third picture: 85

Step-by-step explanation:

Second Picture: 36/6 = 6 and 54/9 = 6 therefore the machine is dividing by six

Third Picture: a multiple of 7 is 84 (7*12 = 84). 85 is one more than a multiple of 7. Therefore 85 is the answer. A formula can be 7x + 1 = (then try out different numbers in the grid)

7x+1 = 85

7x = 84

x = 84/7

x = 12

Therefore 85 is one more than a multiple of 7.

5 0

3 years ago

Read 2 more answers

Answer the photo below thanks

DerKrebs [107]

Answer:

I think its D

Step-by-step explanation:

3 0

3 years ago

The probability that an individual has 20-20 vision is 0.15 0.15. in a class of 49 49 students, what is the probability of fin

Lelu [443]

Answer: This is a Binomial problem where, n=49, p=0.15 and x=5

Therefore,

P(x=5) = $nCx P^{x} (1-p)^{n-x}$

= $49C5 (0.15)^{5} (1-0.15^{49-5}$

= 0.1135

3 0

3 years ago