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2 years ago

Solve using the quadratic formula. 5v2 − 7v − 7 = 0

Mathematics

1 answer:

dimulka [17.4K]2 years ago

8 0

Answer:

Move everything so all terms are on one side of the = sign, and solve for zero using the Quadratic Formula. There are two answers: v=7±√69

Step-by-step explanation:

Subtract 1 from both sides so you have

e "standard form" of a quadratic is

, so first we have to identify a, b, and c in your equation: a=5, b= -7, and c= -1.

The quadratic formula is

. Plugging in your values, we get

−

. It looks a little funny, but you can't simplify it any more. You can check the answer by graphing the function on your calculator and asking for the function value at these points.

After graphing, hit 2nd, "Calc", "Value" on your TI, and type in either

, and you'll get that

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Find the measure of.. (Image included) I'll take all the help I can get please :)

sergey [27]

Answer:

$\sf\Huge\boxed{C.40}$

Step-by-step explanation:

Hello There!

Remember: sum of interior angles of a triangle = 180

so to find x we use this equation

180 = 90 + 7x + 5 + 9x + 5 ( the little square in the triangle indicates that the angle is a right angle. right angles have a measure of 90 so that's where the 90 came from.)

now we solve for x

step 1 combine like terms

90 + 5 + 5 = 100

7x + 9x = 16x

now we have 180 = 16x + 100

step 2 subtract 100 from each side

180 - 100 = 80

100 - 100 cancels out

now we have 80 = 16x

step 3 divide each side by 16

80/16 = 5

16x/16=x

we're left with x = 5

Finally we plug in 5 into x for angle a

7(5)+5

7*5=35

35+5=40

so we can conclude that the measure of angle A is 40 degrees

4 0

3 years ago

How many solutions does the equation x^2-9x=-8 have?

Elza [17]

X^2-9x=-8
x^2-9x+8=-8+8
x^2-9x+8=0
(x-8)(x-1)=0

x-8=0
x-8+8=0+8
x=8

x-1=0
x-1+1=0+1
x=1

There are 2 solutions, which are 1 and 8

8 0

3 years ago

when the driver is in the empty truck, the mass is 2948.35 kilogram. the mass of 1 box of paper is 22.5 kilograms. the driver de

marishachu [46]

Answer:

0 boxes minimum

Step-by-step explanation:

The mass of the truck and paper must satisfy ...

22.5b + 2948.35 ≤ 4700 . . . . total truck mass cannot exceed bridge limits

22.5b ≤ 1751.65

b ≤ 77.85

The driver can take a minimum of 0 boxes and a maximum of 77 boxes of paper over the bridge.

_____

The question asks for the minimum. We usually expect such a question to ask for the maximum.

7 0

3 years ago

Write an expression in simplest form for the area of this shape.

Vitek1552 [10]

Answer:

$x-4+(x-3)x$ This is the answer, if you don't understand, you can ask

Step-by-step explanation:

4 0

3 years ago

X = 2 y = 3 z = 4

NARA [144]

Answer:

Step-by-step explanation:

For example, let's say with have the equation

When

, then

When

then

Hope that was helpful.

3 0

2 years ago

Read 2 more answers