All categories

2 years ago

2v²+5v-7=0 please help!!

Mathematics

1 answer:

vaieri [72.5K]2 years ago

3 0

$2v^2+5v-7=0\\
2v^2-2v+7v-7=0\\
2v(v-1)+7(v-1)=0\\
(2v+7)(v-1)=0\\
v=-\dfrac{7}{2} \vee v=1$

You might be interested in

How would I find the polynomial from the factors?

AURORKA [14]

You add and subtract what's in the parentheses and they that will give u your awnser for x I hope I helped u

7 0

3 years ago

If C = 2m2 + m and D = 2 – 6m + 2m², find an expression that equals 2C - 2D in standard form.

lidiya [134]

C = 2m^2 + m
D = 2 - 6m + 2m^2

2C = 2(2m^2 + m) = 4m^2+2m
2D = 2(2-6m+2m^2) = 4-12m+4m^2

2C - 2D =
4m^2+2m-(4-12m+4m^2) =
4m^2+2m-4+12m-4m^2 =
0m^2 + 14m -4 =
14m - 4

3 0

3 years ago

A standard dartboard has a diameter of 18 in. What is its area to the nearest square inch?

Reptile [31]

The meaning of the area is the measurement of a surface in this case a circle, which can be find by using the formula $A= \pi r^{2}$ , where r is equal to the radius of the circle.

In this exercise is given that the diameter of a standard cardboard is 18 inches or a radius of 9 inches and it is asked to find its area. Therefore, to find the area of the circle you should substitute the value of the radius into the previous mention formula.

$A= \pi r^{2}$
$A= \pi (9 in)^{2}$
$A= \pi (81 in^{2})$
$A=254.47 in^{2}$

The area of the standard dartboard is 254.47 square inches or 254 square inches.

8 0

3 years ago

What is the value of c? O 4 units O 5 units O 6 units O 7 units

Aleksandr [31]

The value of c is 5 units.

Step-by-step explanation:

Given,

WY = a = 4

ZY = b = 3

As WYZ is forming a right angle triangle, therefore, we can use pythagorean theorem to find the value of c

$a^2+b^2=c^2\\(4)^2+(3)^2=c^2\\16+9=c^2\\c^2=25$

Taking square root on both sides

$\sqrt{c^2}=\sqrt{25}\\c=5$

The value of c is 5 units.

Keywords: triangle, square root

Learn more about triangles at:

#LearnwithBrainly

6 0

3 years ago

the floor of a shed has an area of 96 square feet. the floor is in the shape of a rectangle whose length is 4 feet less than twi

Paul [167]

Alright in this one, you are going to need to factor.
The width is x
The length is 2x-4
To find the area of a rectangle is L*W
so (2x-4)(x) when distributed is 2x^2 -4x

Then put that in the equation and you have:
2x^2 -4x = 96
2x^2 -4x -96 = 0

2x^2+12x-16x-96=0
3x(x+4)-4(x+4)=0
(3x-4)=0
(x+4)=0
x=-4
x=3/4
Since length isn't negative
we will use 3/4 as x.

Width= 0.75 ft
Length= 1.5

3 0

3 years ago