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3 years ago

Describe and correct the error.

Mathematics

1 answer:

jolli1 [7]3 years ago

5 0

Area for a triangle =base • Height/2
So the error is they forgot to divide by two.
A=20(9)/2=90ft^2.

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Please help me i really need it

hram777 [196]

Answer:

You just gotta multiply then divide it

Step-by-step explanation:

5 0

2 years ago

How do you graph a line written in standard form

Sonbull [250]

Ok so standard form is a bit tricky, but I’ll help explain

Here’s and example:

If you have 2x+5y=10 here is how you would solve it

First you divide the x value by what the number is equal to (in our example, 10), and then we get 10/2 is 5. So now we know that

x is equal to five

Keep that in mind. Now we just have to do the same thing for the y value. 5/10 is 2, so you know that

y is equal to two

NOW you put those two together, and graph on the intercepts (the positions on the y and x axis where the lines intercept)

You would put a line on the x axis at 5, and on the y axis at 2

If you have any questions, you can ask

4 0

2 years ago

160 is what % of 40<br> plz explain

wolverine [178]

Answer:

150%

Step-by-step explanation:

this is because you can make a part to whole ratio where you have x/100 (which would symbolize the percent) and 160/40 (which would symbolize the part) then, multiply 160 by 100 to get 16000 and then divide by 40 to fulfill the x. Hope this helps!

3 0

3 years ago

How to evaluate 11+y

s344n2d4d5 [400]

Good morning ☕️

Step-by-step explanation:

11+y is an expression that contains a variable ‘y’

then its value depends on ’y’

examples :

if y = 0 → 11+y = 11+0 = 11

if y = 1 → 11+y = 11+1 = 12

if y = 2 → 11+y = 11+2 = 13

and so on.

7 0

3 years ago

1. Determine a rule that could be used to explain how the volume of a

Eva8 [605]

Answer:

See explanation

Step-by-step explanation:

Solution:-

- We will use the basic formulas for calculating the volumes of two solid bodies.

- The volume of a cylinder ( V_l ) is represented by:

$V_c = \pi *r^2*h$

- Similarly, the volume of cone ( V_c ) is represented by:

$V_c = \frac{1}{3}*\pi *r^2 * h$

Where,

r : The radius of cylinder / radius of circular base of the cone

h : The height of the cylinder / cone

- We will investigate the correlation between the volume of each of the two bodies wit the radius ( r ). We will assume that the height of cylinder/cone as a constant.

- We will represent a proportionality of Volume ( V ) with respect to ( r ):

$V = C*r^2$

Where,

C: The constant of proportionality

- Hence the proportional relation is expressed as:

V∝ r^2

- The volume ( V ) is proportional to the square of the radius. Now we will see the effect of multiplying the radius ( r ) with a positive number ( a ) on the volume of either of the two bodies:

$V = C*(a*r)^2\\\\V = C*a^2*r^2$

- Hence, we see a general rule frm above relation that multiplying the result by square of the multiple ( a^2 ) will give us the equivalent result as multiplying a multiple ( a ) with radius ( r ).

- Hence, the relations for each of the two bodies becomes:

$V = (\frac{1}{3} \pi *r^2*h)*a^2$

$V = ( \pi *r^2*h)*a^2$

8 0

3 years ago