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2 years ago

Help? what do i choose

Mathematics

2 answers:

Andrew [12]2 years ago

6 0

Answer:

i think 70 degrees

Step-by-step explanation:

becuase all triangles and up to 180 degrees

70+ 70(becuase two sides are equal ) and +40 equals 180 degrees.. i think 70 is the answer(not sure i'm not a pro when it comes to maths... but that my final answer.

TEA [102]2 years ago

5 0

Answer:

Step-by-step explanation:

So this is an isosceles triangle so the other angle must be x too.

So:

x+x+40 = 180

2x+40 = 180

2x = 140

x = 70

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What is the focus of the parabola? <img src="https://tex.z-dn.net/?f=y%3D%20%5Cfrac%7B1%7D%7B4%7D%20x%5E%7B2%7D%20-x%2B3" id="Te

OlgaM077 [116]

We know that
the equation of the parabola is of the form
y=ax²+bx+c
in this problem
y=1/4x²−x+3
where
a=1/4
b=-1
c=3
the coordinates of the focus are
(-b/2a,(1-D)/4a)
where D is the discriminant b²-4ac
D=(-1)²-4*(1/4)*3-----> D=1-3---> D=-2
therefore
x coordinate of the focus
-b/2a----> 1/[2*(-1/4)]----> 2

y coordinate of the focus
(1-D)/4a------> (1+2)/(4/4)---> 3

the coordinates of the focus are (2,3)

3 0

3 years ago

Read 2 more answers

What is the slope of the line shown?

Over [174]

Answer:

-2

Step-by-step explanation:

1) Look at the y-intercept. The line crosses the y-axis at (0,7)

Follow it down, it goes down two and over one to directly intersect the grid.

Rise over run = 2/1

2/1 = 2

However, the line is negative, as it's sloping down from the left to the right, making the slope -2

5 0

3 years ago

In preperation for an easter egg hunt, 4 blue eggs are filled for every 7 green. How many green eggs will be filled if 100 blue

ivann1987 [24]

Answer:

1. Typed question: 175 green eggs

2. Attached: 22 tables

Step-by-step explanation:

For the question you typed down, it is a ratio and proportion problem. You need to solve for the ratio proportional to the first ratio given.

4 blue eggs are filled for every 7 green. This means that the ratio between blue eggs and green eggs is 4:7.

Now yo need to figure out a ratio proportional to 4:7 if 100 blue eggs were filled. Below is how this is set up:

$\dfrac{4\;blue\;eggs}{7\;green\;eggs} = \dfrac{100\;blue\;eggs}{x\;green\;eggs}$

Now let's solve for x:

$\dfrac{4\;blue\;eggs}{7\;green\;eggs} = \dfrac{100\;blue\;eggs}{x\;green\;eggs}\\\\or\\\\\dfrac{4}{7}=\dfrac{100}{x}\\\\Cross-multiply\\\\4x = (7)(100)\\\\4x = 700\\\\Divide\;both\;sides\;by\;4\\\\\dfrac{4x}{4}=\dfrac{700}{4}\\\\x=175$

For your attached problem:

You have a total of 175 people, you need to figure out how many round tables you need if here are 8 chairs for each table You just need to divide the number of people by the number of chairs per table.

175 ÷ 8 = 21.9 tables

Now since you cannot have half a table, you round up to the nearest whole number. (we round up because you need to make sure that all of them are seated)

21.9 ≅ 22 tables.

8 0

3 years ago

Which expression is the right expression?

Juli2301 [7.4K]

D, you have to factor 3 out of 6x squared

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3 years ago

Which unit is used to measure film size? pixels in cm mm

tatuchka [14]

Mm is the unit used to measure film size. It stands for millimeter.

The standard film size is 35 mm. The standard frame size of a still camera film was 24 x 36 mm.

mm is the smallest unit to measure length of an object. It is followed by cm then in and so on.

1 cm = 10 mm
1 in = 2.54 cm
1 in = 25.4 mm

3 0

3 years ago