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2 years ago

Use the area of the rectangle to find the area of the triangle.

Mathematics

1 answer:

Vesna [10]2 years ago

5 0

Answer:

Step-by-step explanation:

the formula for a triangle is A=1/2bh

so u multiply the base times the height then get 42. if u multiply anything by 1/2 or .5 its the same thing as dividing. so you divide 42 by 2 and get 21.

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I have to get this so I pass help plz

pshichka [43]

Answer:

$\boxed{\sf x=-2}$

$\boxed{\sf y=-4}$

Step-by-step explanation:

First, Let's solve for x in -2x+2y=-4:

$\sf -2x+2y=-4$

Subtract 2y from both sides:

$\sf -2x+2y-2y=-4-2y$

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

Divide both sides by -2:

$\sf \cfrac{-2x}{-2}=-\cfrac{4}{-2}-\cfrac{2y}{-2}$

$\bold{ x=y+2}$

Now, we'll substitute x=y+2 to 3x+3y=-18:

$\sf 3x+3y=-18$

→ let x=2+y

$\sf 3\bold{(2+y)}+3y=-18$

Simplify:

$\sf 6+6y=-18$

Now, let's solve for y in 6+6y=-18

$\sf 6+6y=-18$

Subtract 6 from both sides:

$\sf 6+6y-6=-18-6$

$\sf 6y=-24$

Divide both sides by 6:

$\sf \cfrac{6y}{6}=\cfrac{-24}{6}$

$\bold{ y=-4}$

Now, substitute y=-4 into x=2+y:

$\sf x=2+y$

→ let y = -4

$\sf x=2+\bold{-4}$

$\bold{x=-2}$

Therefore, x=-2 and y=-4.

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5 0

2 years ago

Help! how can i determine the range

djverab [1.8K]

Answer:

$[-1,\infty)$

Step-by-step explanation:

Remember that the range is the set of all y-values. Thus, since the minimum of the function is y=-1, then our range is $[-1,\infty)$ . In interval notation, we use brackets to show what's included and parentheses to show what's not included.

3 0

2 years ago

Read 2 more answers

I need help with this please and fast

erik [133]

Step-by-step explanation:

what are you trying to find???

3 0

3 years ago

4−3(x−5)>6x−17 Given

Alex777 [14]

Answer:

Answer

Step-by-step explanation:

4 0

3 years ago

HELP ASAP!!!!!!!!!!!!WILL MARK BRAINLIEST!!!!!!! THANK YOU<3<3

Leto [7]

Answer:

x= 3/5

Step-by-step explanation:

SOH-CAH-TOA

You have the adjacent and hypotenuse so you will use Cosine

cos=adj/hyp

adj=3

hyp=5

3/5 = cos (or theta)

5 0

3 years ago