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Vsevolod [243]
3 years ago
11

Which expression is equivalent to 30x + 15y? a)45xy b)xy+45 c)15(2x+y) d)15xy(2x+y)

Mathematics
2 answers:
nekit [7.7K]3 years ago
6 0
Answer: C hope this helped
nevsk [136]3 years ago
4 0

Answer:

C

Step-by-step explanation:

because 15*2x=30x and 15*y= 15y and since they are adding in the parentises you add again 30x*15y

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(−10)− 3 to the second power
Mars2501 [29]
(-10)-3 to the second power is -19 as the answer.
3 0
4 years ago
The formula for the volume of a pyramid is
Pepsi [2]

Answer:

h = 3v/b

Step-by-step explanation:

Here, we want to select the equation that solves for h

What this simply means is that we should make h the subject of the formula

Thus, we have 3 * v = bh

3v = bh

h = 3v/b

7 0
3 years ago
Determine whether f(x)=-4(x+3)^2-5 has a maximum or a minimum value, then find that value
Leto [7]

Answer:

Yes it has

Step-by-step explanation:

From my perspective.........

f(x) = -4(x + 3)² - 5

f(x) = -4(x + 3)(x + 3) - 5

f(x) = -4(x² + 6x + 9) - 5

f(x) = -4x² - 24x - 36 - 5

f(x) = -4x² - 24x - 41

Dy/dx = -8x - 24

At minimum Dy/dx = 0

-8x - 24 = 0

-8x = 24

x = 24/-8

x = -3

At minimum

y = -4x² - 24x - 41

y = -4(-3)² - 24(-3) - 41

y = -4(9) + 72 - 41

y = -36 + 72 - 41

y = 36 - 41

y = -5

5 0
3 years ago
The circumference of a circle is 19π ft. What is the area, in square feet? Express your answer in terms of \piπ
Alisiya [41]

Answer:

1134.1 [cm²]

Step-by-step explanation:

A=πr2

Circle area = π * r² = π * 361 [cm²] ≈ 1134.1 [cm²]

π ≈ 3.14159265 ≈ 3.14

d = r * 2 = 19 [cm] * 2 = 38 [cm]

5 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
<span> 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:
</span><span>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 </span>(x+3)^2=-12(y-2)
5 0
3 years ago
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