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vampirchik [111]
3 years ago
12

I need help with this question

Mathematics
2 answers:
tankabanditka [31]3 years ago
7 0
I think the answer is A. 40
n200080 [17]3 years ago
3 0
The correct answer is B) 50.

Straight lines add up to 180 degrees. The outside angle measurements given would tell us that the two known angles are 40 (180-140=40) and 90 (180-90=90). Since triangles must add up to 180 degrees, we take 180-90-40= 50, which is the measure of the missing angle.
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Five friends Al, Bet, Cat, Don, and Ella live on the island where everyone is either a knight or a knave
nalin [4]

Answer:

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Step-by-step explanation:

what am i tryign to solve here

8 0
3 years ago
What is the equation of the quadratic graph with a focus of (3, 6) and a directrix of y = 4? f(x) = one fourth (x − 3)2 + 1 f(x)
mina [271]
 Let point (x, y) be any point on the graph, than the distance between (x, y) and the focus (3, 6) is sqrt((x - 3)^2 + (y - 6)^2) and the distance between (x, y) and the directrix, y = 4 is |y - 4|

Thus sqrt((x - 3)^2 + (y - 6)^2) = |y - 4|
(x - 3)^2 + (y - 6)^2 = (y - 4)^2
x^2 - 6x + 9 + y^2 - 12y + 36 = y^2 - 8y + 16
x^2 - 6x + 29 = -8y + 12y = 4y
(x - 3)^2 + 20 = 4y
y = 1/4(x - 3)^2 + 5

Required answer is f(x) = one fourth (x - 3)^2 + 5
8 0
3 years ago
The mass of a sheet of metal varies jointly with its area and its thickness. A sheet of metal of area 250cm2 and thickness 1mm h
noname [10]

The Formula of the relation is M = 8AT.

The mass of the metal sheet is 960 g.

The expression below shows the variation between the mass of the sheet (M), Area of the Sheet(A), and thickness (T).

Proportionality:

  • M ∝ AT

Removing the proportionality sign,

  • M = KAT

Where:

  • K = constant of proportionality.

make K the subject of the equation:

  • K = M/KT.................... Equation 1

From the question,

Given:

  • M = 200 g
  • A = 250 cm²
  • T = 1 mm = 0.1 cm

Susbtitute into equation 1

  • K = 200/(250×0.1)
  • K = 8 g/cm³

Formula:

  • M = 8AT................. equation 2

Hence the formula of the relation is M = 8AT

If,

  • A = 400 cm²
  • T = 3 mm = 0.3

Substitute these values into equation 2

  • M = 8(400)(0.3)
  • M = 960 g

Hence,  the mass of the metal sheet is 960 g

Learn more about joint variation here: brainly.com/question/26047253

6 0
2 years ago
A graph of a quadratic function is shown below.
stira [4]

Answer:

d. (10,800)

Step-by-step explanation:

Vertex appears to be at x = 10

Vertex: (10,800)

6 0
3 years ago
6w-y=2z, Solve for the value of w
Lerok [7]
6w-y=2z 6w=2z+y w=(2z+y):6 w=(z:3)+(y:6)
7 0
3 years ago
Read 2 more answers
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