Ask question

Ask question

All categories

4 years ago

7

Which of these shows the result of using the first equations to substitute or y in the seconds equations then combining like ter

m?
Y=3x
2x+3y=55

A.5x=55
B.9×=55
C.11×=55
D.5y=55

1 answer:

MAXImum [283]4 years ago

3 0

Answer: C ppppppppppppl

You might be interested in

Help please urgently it’s area of a triangle: sine formula

Deffense [45]

Area = 1/2abSinC. 1/2(33)(17) x Sin 37°. = 561/2 x Sin 37° = 168.81 km2

6 0

3 years ago

Use the distance formula to find the perimeter of the triangle below. Round you answer to the nearest hundredth.

Murrr4er [49]

<u>jAlright, let's take this problem step-by-step</u>:

<u>What is the perimeter</u>:

⇒ all the side-lengths added up

⇒ <em>need</em> to find side-length using distance formula

$Distance_._. Formula=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

- (x₁,y₁): first point

- (x₂,y₂): second point

<u>Let's solve</u>:

Find length of <em>AC</em>

⇒ <em>first point</em>: (5,7)

<em> ⇒ second point: </em>(3,3)

<em> </em> $Distance =\sqrt{(3-5)^2+(3-7)^2} =\sqrt{4+16} =\sqrt{20} =4.472$

Find length of AB

⇒ <em>first point:</em> (5,7)

<em> ⇒ second point:</em>(8,6)

<em> </em> $Distance=\sqrt{(8-5)^2+(6-7)^2} =\sqrt{9+1} =\sqrt{10}=3.162$

Find length of BC

⇒<em> first point: </em>(8,6)

<em> ⇒ second point: </em>(3,3)

<em> </em> $Distance = \sqrt{(3-8)^2+(3-6)^2} =\sqrt{25+9} =\sqrt{34}=5.831$

<u>Now let's solve for the perimeter</u>:

$Perimeter = 4.472+ 3.126+ 5.831=13.429$

<u>Answer: 13.43</u> (<em>rounded to the nearest hundredth)</em>

Hope that helps!

#LearnwithBrainly

<em> </em>

5 0

2 years ago

What is the vertex of the following function? f(x) = 2(x+8)^2 - 2

netineya [11]

$~~~~~~\textit{vertical parabola vertex form} \\\\ y=a(x- h)^2+ k\qquad \begin{cases} \stackrel{vertex}{(h,k)}\\\\ \stackrel{"a"~is~negative}{op ens~\cap}\qquad \stackrel{"a"~is~positive}{op ens~\cup} \end{cases} \\\\[-0.35em] ~\dotfill\\\\ f(x)=2(x+8)^2-2\implies f(x)=2[x-(\stackrel{h}{-8})]^2\stackrel{k}{-2}~\hfill \stackrel{vertex}{(-8~~,~~-2)}$

4 0

2 years ago

Help picture below problem 16

Allisa [31]

Answer:

5

Step-by-step explanation:

a²+b²=c²

In this case c is 13 and b is 12

a²+12²=13³

a²+144=169

Subtract 169 and 144 to find a

169-144=25

The square root of 25 is 5

5 0

3 years ago

Hurry up!plz help I am in trouble

Tema [17]

Answer:

24.2 marks

Step-by-step explanation:

25 + 36 + 20 + 15 + 24 + 30 + 38 + 32 + 22 = 242

since there are 10 students we divide 242 by 10 and get 24.2

4 0

3 years ago

Read 2 more answers