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Zarrin [17]
3 years ago
11

What's slope Line pass through( 14, 4)( 21, 6

Mathematics
1 answer:
Svet_ta [14]3 years ago
5 0
What's slope Line
pass through( 14, 4)( 21, 6 Answer :m=2/7
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The sides of ∆ABC are 30 units, 40 units, and 60 units long. The corresponding sides of ∆XYZ are r times as long as the sides of
san4es73 [151]

Part a) Find the expression that gives the perimeter of ∆XYZ

we know that

Perimeter of triangle ABC is equal to

P=30+40+60\\ P=130\ units

In this problem ∆ABC and ∆XYZ are similar triangles

the scale factor is equal to r

so

scale\ factor=r \\ \\ scale\ factor=\frac{perimeter\ triangle\  XYZ}{perimeter\  triangle\  ABC}  \\ \\ perimeter\ triangle\  XYZ=perimeter\  triangle\  ABC*scale factor\\ \\ perimeter\ triangle\  XYZ=130*r

therefore

the answer Part a) is

The expression that gives the perimeter of ∆XYZ is 130*r\ units

Part b) Find the expression that gives the area of ∆XYZ

we know that

Area\ of\ triangle\ ABC=n\ units^{2}

scale\ factor=r \\ \\ scale\ factor^{2}=\frac{Area\ triangle\  XYZ}{Area\  triangle\  ABC}  \\ \\ Area\ triangle\  XYZ=Area\  triangle\  ABC*scale factor^{2}\\ \\ Area\ triangle\  XYZ=n*r^{2}\ units^{2}

therefore

the answer Part b) is

The expression that gives the Area of ∆XYZ is n*r^{2}\ units^{2}

3 0
3 years ago
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Need the answer<br> Find (3x+7)2 .
Alekssandra [29.7K]

Answer:

<u>9x² + 42x + 49</u>

Step-by-step explanation:

<u>Identity</u>

  • (x + a)² = x² + 2ax + a²

In this case, x = 3x and a = 7, so <u>substitute</u> the values.

  • (3x + 7)²
  • (3x)² + 2(3x)(7) + (7)²
  • <u>9x² + 42x + 49</u>
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3 years ago
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What part of 15 is 3
Strike441 [17]
When we say "5 is the third part of 15," we do not imply a sequence: the first part, the second part, the third, and so on. When we speak of the third part, that is a different meaning for the word "third." It means each one of three equal parts that together make up the whole
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3 years ago
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The graph of a linear function h contains the points given in the table below.
4vir4ik [10]

The basic form of linear function is

y=ax+b

For finding the slope, use the slope formula.

(4-2)/(-2+1)= 2/-1=-2

We first found a which is -2.

Then insert any point to find the value of b. In this case, I will insert (1,-2).

-2=-2+b

b=-2+2=0

The linear graph is y=-2x

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4 years ago
I made a mistake on my last question but math question under the cut
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Answer:

what is the question?

Step-by-step explanation:

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