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Charra [1.4K]
3 years ago
8

Can somebody help me ?

Mathematics
1 answer:
inna [77]3 years ago
3 0

Answer:

16

Step-by-step explanation:

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What is a HYPOTHESIS​
s2008m [1.1K]

Answer:

Step-by-step explanation:

A hypothesis is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories

8 0
4 years ago
Read 2 more answers
Hoses A and B spout water at different constant rates, and hose A can fill a certain pool in 6 hours. Hose A filled the pool alo
Naddik [55]

Answer:

18 hours

Step-by-step explanation:

Let the volume of the pool be x. Since pipe A filled the  pool in 6 hours, the rate of pipe A = x / 6.

Let the rate of pipe b be y, Hose A filled the pool alone for the first 2 hours, this means that the volume filled in the 2 hours is x/6(2 hours) and the two hoses, working together, then finished filling the pool in another 3 hours for the 3 hours the volume filled is x/6(3) + y(3).  hence the total time is:

x/6(2) + x/6(3) + y(3) = x

x/3 + x/2 + 3y = x

Multiply through by 6:

2x + 3x + 18y = 6x

5x + 18y = 6x

18y = x

y = x/18

The rate of pipe B is x/18, this means it would take pipe B 18 hours to full the pool alone

8 0
4 years ago
Select the equation in point-slope form for the line that passes through the point (1, –1) and has a slope of 4.
Dvinal [7]

Answer:

\large \boxed{y + 1 = 4(x - 1)}

Step-by-step explanation:

The point-slope formula for a straight line is

y - y₁= m(x - x₁)

x₁ = 1; y₁ = -1; m = 4  

Substitute the values

\begin{array}{rcl}y - (-1) & = & 4(x - 1)\\y + 1 & = & 4(x - 1)\\\end{array}\\\text{The equation for the line in point-slope form is $\large \boxed{\mathbf{y + 1 = 4(x - 1)}}$}

The figure shows the graph of the equation with slope 4 passing through (1, -1).

7 0
3 years ago
I can tell me you’re asked to solve negative 4X -25 equals 8X +15 identify where one of them made an error
hammer [34]

x = - \frac{10}{3}

- 4x - 25 = 8x + 15

subtract 8x from both sides

- 4x - 8x - 25 = 15

- 12x - 25 = 15

add 25 to both sides

- 12x = 15 + 25 = 40

divide both sides by - 12

x = \frac{40}{- 12} = - \frac{10}{3}


8 0
4 years ago
What is an equation of the line that passes through the point (-1, -3) and is perpendicular to the line x –2y = 14?​
solong [7]
Make equation: y = mx + b
x = 2y + 14
2y = x - 14
y = 1/2x - 7
Perpendicular: opposite sign and reciprocal slope
y = -2x + b
-3 = -2(-1) + b, b = -5
Equation: y = -2x - 5
4 0
3 years ago
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