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3 years ago

Need help i will mark brainliest

Mathematics

2 answers:

Oduvanchick [21]3 years ago

8 0

Answer:

12 in the first option bro

NeX [460]3 years ago

4 0

Answer:

6 sq. in

Step-by-step explanation:

To find area of triangle: base* height *1/2

height needs to be at a 90 degree angle from the base.

In this example, the base is 3 in, and the height is 4 in.

Plug these two into the equation

3 * 4 * 1/2 = 12 * 0.5 = 6

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What is the distance between points (12, 4) and (12, -10) on the coordinate plane

saul85 [17]

The distance is 14 between coordinates'

5 0

3 years ago

una ventana rectangular tiene l metros de ancho y h metros de altura, con un perímetro de 6 metros y un área de 2m² ¿cuál es la

seropon [69]

Answer:

The formula for calculating the width of the window is

$w=\frac{-(-3)(+/-)\sqrt{-3^{2}-4(1)(2)}} {2(1)}$

Step-by-step explanation:

The question in English is

A rectangular window is l meters wide and h meters high, with a perimeter of 6 meters and an area of 2m². What is the formula for calculating the width of the window?

we know that

The perimeter of the window is equal to

$P=2(l+w)$

we have

$P=6\ m$

$6=2(l+w)$

simplify

$3=(l+w)$

isolate the variable l

$l=3-w$ ----> equation A

The area of the window is equal to

$A=lw$

we have

$A=2\ m^2$

$2=lw$ ----> equation B

substitute equation A in equation B

$2=(3-w)w$

solve for w

$2=3w-w^2$

$w^2-3w+2=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$w^2-3w+2=0$

$a=1\\b=-3\\c=2$

substitute in the formula

$w=\frac{-(-3)(+/-)\sqrt{-3^{2}-4(1)(2)}} {2(1)}$ ---> formula for calculating the width of the window

$w=\frac{3(+/-)\sqrt{1}} {2}$

$w=\frac{3(+/-)1} {2}$

$w=\frac{3(+)1} {2}=2\ m$

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

7 0

4 years ago

Help quick plz i will make you a brainllest

blsea [12.9K]

Answer: B

Step-by-step explanation:

LJ should corresponds with RQ but it should correspond with PR.

8 0

3 years ago

Read 2 more answers

I am very confused please solve and explain.

e-lub [12.9K]

Answer:

c = $\frac{b^2-R^2}{4a}$

Step-by-step explanation:

Given

R= $\sqrt{b^2-4ac}$

Clear the radical by squaring both sides

R² = b² - 4ac ( subtract b² from both sides )

R² - b² = - 4ac ( multiply all terms by - 1 )

b² - R² = 4ac ( divide both sides by 4a )

$\frac{b^2-R^2}{4a}$ = c

6 0

3 years ago

Read 2 more answers

1) Solve for x. x+23=−22 2) Solve for a. a+(−1.3)=−4.5

8090 [49]

X+23=-22
-23 -23

x=-45

a+(-1.3)=-4.5

or

a-1.3+-4.5
+1.3 +1.3

a=3.2

6 0

4 years ago

Read 2 more answers