All categories

3 years ago

Please help giving BRAINLYEST

Mathematics

2 answers:

scoundrel [369]3 years ago

6 0

Answer:

Last one:

2 x + 4 y = 6. 3 x minus 4 y = 9.

Step-by-step explanation:

2x + 4y = 6

3x - 4y = 9

4y = 3x - 9

2x + 3x - 9 = 6

5x = 15

x = 3

4y = 3(3) - 9

4y = 0

y = 0

Only one solution, which is (3,0)

likoan [24]3 years ago

5 0

Answer:

2x+4y =6

3x -4y =9 one solution

Step-by-step explanation:

4x+2y =8

-4x-2y =3

Adding these together

0 =11 False no solutions

-5x +y =6

5x -y = -6

Adding these together

0 = 0 True we get Infinite solutions

-3x+4y =2

3x-4y =0

Adding these together

0=2 False no solutions

2x+4y =6

3x -4y =9

Add these together

5x =15

Divide by 5

5x/5 = 15/5

x =3

2(3) +4y =6

10 +4y =6

4y = 0

y = 0

(3,0)

One solution

You might be interested in

The radius of a sphere is increasing at a rate of 3 mm/s. How fast is the volume increasing when the diameter is 60 mm

mina [271]

Answer:

The volume is increasing at a rate of 33929.3 cubic millimeters per second.

Step-by-step explanation:

Volume of a sphere:

The volume of a sphere of radius r is given by:

$V = \frac{4\pi r^3}{3}$

In this question:

We have to derivate V and r implicitly in function of time, so:

$\frac{dV}{dt} = 4\pi r^2\frac{dr}{dt}$

The radius of a sphere is increasing at a rate of 3 mm/s.

This means that $\frac{dr}{dt} = 3$

How fast is the volume increasing when the diameter is 60 mm?

Radius is half the diameter, so $r = 30$ . We have to find $\frac{dV}{dt}$ . So

$\frac{dV}{dt} = 4\pi r^2\frac{dr}{dt}$

$\frac{dV}{dt} = 4\pi (30)^2(3) = 33929.3$

The volume is increasing at a rate of 33929.3 cubic millimeters per second.

5 0

3 years ago

Write the point-slope form of the line that passes through (1, -5) and is parallel to a line with a slope of 1. Include all of y

aksik [14]

Y - y1 = m(x - x1)
slope(m) = 1...because a parallel line will have the same slope
(1,-5)...x1 = 1 and y1 = -5
now we sub
y - (-5) = 1(x - 1) =
y + 5 = 1(x - 1) <== u could leave that first " one " out if u want...

8 0

3 years ago

Read 2 more answers

First four terms <br> f(n)=n^3-n^2+1

mrs_skeptik [129]

Answer:

The function of this equation is: $F(n)=\frac{1}{4}n^4-\frac{1}{3}n^3+n+C$

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Exam Guidelines

Ganezh [65]

Answer:

it's A because it's not B or C

7 0

2 years ago

Find the equation of the straight line that passes through the point (1,1/2) and has slope 1/2. Enter the equation in the point-

Nataliya [291]

$\bf \begin{array}{lllll}
&x_1&y_1\\
% (a,b)
&({{ 1}}\quad ,&{{ \frac{1}{2}}})\quad 
% (c,d)

\end{array}
\\\quad \\
% slope = m
slope = {{ m}}= \cfrac{rise}{run} \implies\cfrac{1}{2}
\\ \quad \\
% point-slope intercept
y-{{ y_1}}={{ m}}(x-{{ x_1}})\qquad 
\begin{array}{llll}
\textit{plug in the values}\\

\end{array}\\
\qquad \uparrow\\
\textit{point-slope form}$

5 0

3 years ago