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3 years ago

Write a problem that the expression 3(-7)-10+25= -6 could represent.

Mathematics

1 answer:

vampirchik [111]3 years ago

8 0

Answer:

-6

Step-by-step explanation:

3(-7)-10+25

-21-10+25

-31+25

-6

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Which matrices can be added together?

MaRussiya [10]

The ones that have the same number of rows and columns

8 0

3 years ago

An equation of a parabola with its vertex at (-3,2) and focus at (-3,-1) written in general equation form

german

we have that
standard form of equation for parabola:
(x-h)^2=-4p(y-k)
(h,k) --------->being the (x,y) coordinates of the vertex.
Parabola opens downwards because focus is below vertex on the axis of symmetry.
For given problem:
vertex: (-3,2)
axis of symmetry: x=-3
p=distance from vertex to focus on the axis of symmetry=2-(-1)=3
4p=12
Directrix: y=2+p=5
Equation:
(x+3)^2=-12(y-2)

the answer is (x+3)^2=-12(y-2)

5 0

3 years ago

Write an exponential model given the two points (6,130) and (7,220).

Katyanochek1 [597]

Answer:

y=90x−410

Step-by-step explanation:

in point-slope form, this would be...

y−130=90⋅(x−6)<-----

If you convert this to slope-intercept form this would be...

y=90x−410

5 0

2 years ago

Al bob and carl can life 240 pounds.

padilas [110]

Answer:

1020 POUNDS.

Step-by-step explanation:

i think im not sure if i am wrong tell me and i wiil redo! :)

5 0

2 years ago

A water storage tank has the shape of a cylinder with diameter 14 ft. It is mounted so that the circular cross-sections are vert

andrezito [222]

Answer:

percentage of the total capacity is 75.6%

Step-by-step explanation:

Hello! To solve this problem we follow the following steps

1. draw the complete scheme of the problem (see attached image)

2. To solve this problem we must find the area of the circular sector using the following equation.(c in the second attached image)

$A=\frac{R^2}{2} (\alpha -sin\alpha )$

$\alpha =2arccos(\frac{d}{R})$

3. observing the attached images we replace the values in the equations and find the area of the circular sector, remember that you must transform the angle to radians

$\alpha =2arccos(\frac{5}{7})=88.83$