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evablogger [386]

3 years ago

7

What is the perimeter of a 4 inch square

2 answers:

algol [13]3 years ago

5 0

16 inches.

There are four sides on a square, and if each side is 4 inches, multiply the 4 sides by 4 inches.

4 x 4 = 16

Vesna [10]3 years ago

3 0

16... Is the answer

Perimeter = calculating the size all around

4 inches x 4 sides = 16 inches

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Find the area in cm2 of a rhombus whose side length is 29 cm and

kotegsom [21]

$\left(\frac{d}{2}\right)^2+\left(\frac{d+2}{2}\right)^2=29^2\\\\\frac{d^2}{4}+\frac{d^2+4d+4}{4}=841\ \ \ \ /\cdot4\\\\d^2+d^2+4d+4=3364\\\\2d^2+4d+4-3364=0\\\\2d^2+4d-3360=0\ \ \ \ /:2\\\\d^2+2d-1680=0$

$a=1;\ b=2;\ c=-1680\\\\\Delta=b^2-4ac\to\Delta=2^2-4\cdot1\cdot(-1680)=4+6720=6724\\\\\sqrt\Delta=\sqrt{6724}=82\\\\d_1=\frac{-b-\sqrt\Delta}{2a}\to d_1=\frac{-2-82}{2\cdot1} < 0\\\\d_2=\frac{-b+\sqrt\Delta}{2a}\to d_2=\frac{-2+82}{2\cdot1}=\frac{80}{2}=40\ (cm)\\\\d=40cm;\ d+2=42cm\\\\A_r=\frac{d(d+2)}{2}\to A_r=\frac{40\cdot42}{2}=840\ (cm^2)$

3 0

3 years ago

What is the equation of the graphed line written in standard form? 2x – y = –4 2x – y = 4 y = 2x – 4 y equals StartFraction one-

svp [43]

Answer:

The answer is "2x-y=4"

Step-by-step explanation:

Given:

$2x-y=-4\\2x-y=4\\y=2x-4\\y=\frac{1}{2}(x-4)\\$

The Formula of Slope:

$m=\frac{y_2-y_1}{x_2-x_1}$

by replacing the (2,0) and (0,-4) coordinates in the above formula:

$\to m= \frac{-4-0}{0-2}\\\\ \to m= \frac{-4}{-2}\\\\ \to m= \frac{4}{2}\\\\ \to m= 2\\\\$

if point y intercepting in x then x=0, for this the value of x= 0 and c=-4.

Equation of the line:

$\to y=mx+c$

apply m and c value in the above equation:

$\to y=2x-4\\$

Subtract by 2x on both sides of the equation we get:

$\to y-2x= 2x-4-2x\\\\\to y-2x=-4\\\\\boxed{\boxed{2x-y=4}}\\\\$

5 0

4 years ago

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Help! Brainliest, stars, and hearts! Please help!

kondor19780726 [428]

Answer:

-3

Step-by-step explanation:

r u serious?

3 0

3 years ago

Clare earns 75 the next week from an after school job and deposits just enough into her account so that she is out of debt.

CaHeK987 [17]

Answer: As she was in a debt of $50 , she is left with $25

-$50 + $75 = $25

Step-by-step explanation:

3 0

3 years ago

What is 90% of 45?????

geniusboy [140]

Answer:

40.5

Step-by-step explanation:

i would recommend changing the 90% into a decimal

90% ⇒ .90

then now you can just multiply .90x45

.90x45=40.5

7 0

2 years ago

Read 2 more answers