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3 years ago

What strategy for finding area and perimeter of a 2 dimensional shape?

Mathematics

2 answers:

Mice21 [21]3 years ago

8 0

Area is supposed to be multiplied by 2.

evablogger [386]3 years ago

3 0

To calculate area, it changes depending on the shape, but for a square you multiply the length and width. For perimeter, add up all of the sides.

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If you know that 4 of an item costs a certain amount, and you want to find out how much one costs, which operation will you use?

Natalija [7]

Answer:

The answer would be division (B)

Step-by-step explanation:

4x equals the total amount

x equals the cost of one item

Therefore you'd divide total cost by 4 and that would find the cost of one item

6 0

3 years ago

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PLS HELP:( !! What is an equation of the line

pychu [463]

Answer:

$y = \frac{3}{2} x + 8$

Step-by-step explanation:

The given equation is written in the form of y=mx+c (where m is the gradient and c is the y-intercept).

Thus, gradient of given equation= -⅔

The products of the gradient of perpendicular lines is -1.

(Gradient of line)(-⅔)= -1

Gradient of line

$= - 1 \div ( - \frac{2}{3} ) \\ = \frac{3}{2}$

Hence, m= $\frac{3}{2}$ .

Subst. m= $\frac{3}{2}$ into the equation:

$y = \frac{3}{2} x + c$

To find the value of c, substitute a pair of coordinates into the equation:

When x= -4, y= 2,

$2 = \frac{3}{2} ( - 4) + c \\ 2 = - 6 + c \\ c = 2 + 6 \\ c = 8$

Thus, the equation of the line is $y = \frac{3}{2} x + 8$ .

3 0

3 years ago

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What is the inverse of the function f(x) = x + 2?

jeka57 [31]

Y=x+2 solve for x and then reverse labels...

y-2=x so

y=x-2

f^-1(x)=x-2 is the inverse of f(x)=x+2

5 0

3 years ago

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Given that y= 12 cm and θ= 24 °, work out x rounded to 1 DP.<br><br> (not drawn to scale.)

padilas [110]

Answer:

$\huge\boxed{\sf x = 5.3}$

Step-by-step explanation:

<h3><u>Given:</u></h3>

y = 12 cm

θ = 24°

Using trigonometric ratio, tan.

$\displaystyle \boxed{tan \theta = \frac{opposite}{adjacent} }\\\\tan \ 24 = \frac{x}{12} \\\\0.445 = \frac{x}{12} \\\\Multiply \ 12 \ to \ both \ sides\\\\0.445 \times 12 = x\\\\5.3 = x\\\\x = 5.3\\\\\rule[225]{225}{2}$

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2 years ago

Help pls. I have been stuck on this for 15 minutes now.

zlopas [31]

Answer:

Y=0.35x+18.99

Step-by-step explanation:

Y = total cost

X = number of letters

6 0

3 years ago

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