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PilotLPTM [1.2K]
4 years ago
12

Solve the equation 4c2 + 7c – 5 = 0 using the quadratic formfoula

Mathematics
1 answer:
irakobra [83]4 years ago
3 0

Let's solve your equation step-by-step.

4c2+7c−5=0

Step 1: Use quadratic formula with a=4, b=7, c=-5.

c=

−b±√b2−4ac

2a

c=

−(7)±√(7)2−4(4)(−5)

2(4)

c=

−7±√129

8

c=

−7

8

+

1

8

√129 or c=

−7

8

+

−1

8

√129

Answer:

c=

−7

8

+

1

8

√129 or c=

−7

8

+

−1

8

√129Let's solve your equation step-by-step.

4c2+7c−5=0

Step 1: Use quadratic formula with a=4, b=7, c=-5.

c=

−b±√b2−4ac

2a

c=

−(7)±√(7)2−4(4)(−5)

2(4)

c=

−7±√129

8

c=

−7

8

+

1

8

√129 or c=

−7

8

+

−1

8

√129

Answer:

c=

−7

8

+

1

8

√129 or c=

−7

8

+

−1

8

√129Let's solve your equation step-by-step.

4c2+7c−5=0

Step 1: Use quadratic formula with a=4, b=7, c=-5.

c=

−b±√b2−4ac

2a

c=

−(7)±√(7)2−4(4)(−5)

2(4)

c=

−7±√129

8

c=

−7

8

+

1

8

√129 or c=

−7

8

+

−1

8

√129

Answer:

c=

−7

8

+

1

8

√129 or c=

−7

8

+

−1

8

  • √129
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If sales tax is 6% and you buy a shirt for $25 how much do you owe?
Leona [35]

Answer:

26.50

Step-by-step explanation:

First we need to calculate the sales tax

25 * 6%

Changing to decimal from

25 * .06

1.50

Then we add the tax to the cost of the shirt

25+1.50

26.50

We owe 26.50

7 0
3 years ago
Danielle constructs a scale model of a building with a rectangular base. Her model is 2 inches in length and 1 inch in width. Th
galben [10]

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Step-by-step explanation: If the width is 47 and the length is 94, the area of the rectangle would be 4,418 ft².

8 0
3 years ago
Simplify (x²-1)∧-2/3
SVEN [57.7K]
(x² - 1)^-2/3
∛(x² - 1)-²
∛(1/(x² - 1)(x² - 1))
∛(1/(x^4 - x² - x² + 1))
∛(1/(x^4 - 2x² + 1))
1/x^4/3 - 1.25992105x^2/3 + 1
8 0
4 years ago
Translated up 3 units and left 2 units
seraphim [82]
What are we trying to answer here lol
6 0
3 years ago
Print Version
san4es73 [151]

Answer:

$9450

Step-by-step explanation:

We will use compound interest formula:

F=P(1+r)^t

Where

F is future amount [what we want to figure out]

P is present amount [9000]

r is rate of interest [since we want for 6 months, the annual interest divided by 2 is r. So r = 10/2 = 5% or 0.05]

t is the time [ the time period is for 6 months so t = 1 since we already converted the interest rate to 6 month chunk]

Putting in formula, we get:

F=P(1+r)^t\\F=9000(1+0.05)^1\\F=9000(1.05)\\F=9450

6 0
4 years ago
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