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Ksju [112]
3 years ago
7

Solve: 2x^2+4x-3=0 using the quadratic formula

Mathematics
1 answer:
algol133 years ago
7 0
Okay

Assuming you know quadratic formula it would be

-4+/- square root 4^2 -4(2)(-3)
Divided by 2(2)

So
First we’ll do whatever is under the square root

4x4= 12
-4(2)(-3) = 24

so 12+24= 36

36 square root is 6

So 4+/- 6
Divided by 4


So

4+(-6)= -2
4-(-6)= -10

-2 divided by 4 = -0.5
-10 divided by 4 = -5

An easy way to remember this is label your numbers Ax^2+Bx+C

Or it’s much easier to use completing the perfect square.
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What is x? 3x+43=100​
jenyasd209 [6]

Answer:

x = 19

Step-by-step explanation:

Solve for x:

3 x + 43 = 100

Subtract 43 from both sides:

3 x + (43 - 43) = 100 - 43

43 - 43 = 0:

3 x = 100 - 43

100 - 43 = 57:

3 x = 57

Divide both sides of 3 x = 57 by 3:

(3 x)/3 = 57/3

3/3 = 1:

x = 57/3

The gcd of 57 and 3 is 3, so 57/3 = (3×19)/(3×1) = 3/3×19 = 19:

Answer:  x = 19

8 0
3 years ago
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A cruise ship traveled 432 miles in 24 hours. What was its average rate of speed?
Arturiano [62]

Answer:

18 miles an hour

Step-by-step explanation:

Divide 432 by 24 to get 18.

4 0
2 years ago
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there were a total of 125 cars at a car dealership. A salesperson sold 68 of the cars in one month. Write and solve an inequalit
Angelina_Jolie [31]
Let c represent the number of cars that the salesman has left to sell.

      68 + c ≤ 125
68-68 + c ≤ 125 -68
               c≤57
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Answer:
68 + c ≤ 125; c ≤ 57 cars or less left to sell.
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4 years ago
Which equations could be used to solve for the unknown lengths of △ABC? Check all that apply.
GuDViN [60]

Applying the trigonometric ratios, the equations that can be used are:

sin 45 = BC/9

cos 45 = BC/9

<h3>How to Apply the Trigonometric Ratio?</h3>

In the given image below, to find the unknown lengths of the triangle, we would apply the following trigonometric ratios:

To find AC, use the cosine ratio, CAH.

To find BC, use the sine ratio, SOH.

sin 45 = opp/hyp = BC/9

sin 45 = BC/9

cos 45 = adj/hyp = BC/9

cos 45 = BC/9

Learn more about the trigonometric ratios on:

brainly.com/question/10417664

#SPJ1

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2 years ago
A cubic centimeter can be expressed as<br> a.cm3 or cc<br> b. ccm<br> c. ccm3<br> or d.ct
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When multipled

cm^1 x cm^1 x cm^1 = cm^3 or cc for cubic centimeters the answer is A.
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