All categories

4 years ago

Can someone help me get prepared for this DBA? [will give brainliest and a thanks]

Mathematics

1 answer:

DaniilM [7]4 years ago

8 0

One way to determine the scale factor of a dilation is if you are using a graph then you can pick two corresponding points of the before and after and divide them and you can get the scale factor.

The second one is true because if you have 2 angle measures then you can automatically find the third because we know that all the angles of a triangle add up to 180 so lets say that one angle is 94 degrees and another is 38 degrees we would add those two up to get 132 and then we would subtract that from 180 to get the third angle which would be 48 degrees.

The third one, vertical angles have a common vertex, but they are never adjacent angles. Also, vertical angles are always congruent.

You might be interested in

Help me please!!!!!!!!!!!!!!!!!!!!!!!

Agata [3.3K]

Answer:

Step-by-step explanation:

8 0

3 years ago

What is the domain of the function of y=√x+8 -7

kirza4 [7]

Answer:

Step-by-step explanation:

Recall that the argument of the square root function y = √x must always be 0 or greater.

If you meant y=√x+8 -7, the domain is therefore [0, infinity).

But if you meant y=√(x+8) -7, the domain is [-8, infinity).

Those parentheses are important!

8 0

3 years ago

You have two circular flower beds, as shown. The sum of the areas of two flower beds is 136 pi square feet. Find the radius of e

finlep [7]

Answer:

Radius of larger flower bed = 10 feet

Radius of smaller flower bed = 6 feet

Step-by-step explanation:

Complete question:

"You have two circular flower beds, as shown. The sum of the areas of two flower beds is 136 pi square feet. Find the radius of each bed."

Radius of larger flower bed = r

Radius of smaller flower bed = r - 4

Now,

Area of circle is $\pi r^2$

Since, total area is $136\pi$ , we can write:

$\pi r^2 + \pi (r-4)^2=136\pi$

Expanding and solving for r:

$\pi r^2 + \pi (r-4)^2=136\pi\\r^2+(r-4)^2=136\\r^2 + r^2 - 8r + 16 = 136\\2r^2-8r-120=0\\2(r+6)(r-10)=0\\r=-6,10$

Radius cannot be negative, so r = 10 & r-4 = 10 -4 = 6

Radius of larger flower bed = 10 feet

Radius of smaller flower bed = 6 feet

8 0

3 years ago

Find the center, vertices, and foci for the ellipse 25x^2+64y^2=1600

Ronch [10]

Answer:

Step-by-step explanation:

Answer:

Data

Equation 25x² + 64y² = 1600

Process

1.- Divide all the equation by 1600

25x²/1600 + 64y²/ 1600 = 1600/1600

-Simplify

x²/64 + y²/ 25 = 1

2.- Equation of a horizontal ellipse

3.- Find a, b and c

a² = 64 a = 8

b² = 25 b = 5

-Calculate c with the Pythagorean theorem

a² = b² + c²

-Solve for c

c² = a² - b²

-Substitution

c² = 8² - 5²

-Simplification

c² = 64 - 25

c² = 39

-Result

c = √13

4.- Find the center

C = (0, 0)

5.- Find the vertices

V1 = (-8, 0) V2 = (8, 0)

6.- Find the foci

F1 = (-√13, 0) F2 = (√13, 0)

4 0

3 years ago

Read 2 more answers

Can someone pls help me

liberstina [14]

Answer:

Tenth: 6.2

Hundredth: 6.16

Thousandth: 6.159

Step-by-step explanation:

***In general, round up when the number is greater or equal to 5. If number is less, round down***

Rounding to the tenths place means that there will be a SINGLE digit following the decimal. Therefore, 6.1592 rounded to the tenths place will be 6.2 because '5' is equal to 5.

Rounding to the hundredths place means that there will be TWO digits following the decimal. Therefore, 6.1592 rounded to the hundredths place becomes 6.16 because '9' is greater than 5.

Rounding to the thousandths place means that there will be THREE digits after the decimal. 6.1592 rounded to the thousandths place becomes 6.159 because the digit to the right of the thousanths place is '2', meaning you round down. The digit in the thousandths place will stay the same.

4 0

4 years ago