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Helga [31]
3 years ago
6

4. Solve by factoring: x2 + 5x - 14 = 0

Mathematics
2 answers:
Ludmilka [50]3 years ago
8 0

Answer:

(x+7) (x-2) = 0

so your answer is, -7,2

Step-by-step explanation:

scoundrel [369]3 years ago
4 0

Answer:

x=2, -7

Step-by-step explanation:

x^2+5x-14

=(x-2)(x+7)

x+7=0    x=-7

x-2=0    x=2

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A tree grows 20 percent taller every year after it is planted. The tree was 12 feet tall when planted. How tall will it be after
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Answer:

Option A; 74.3 feet

Step-by-step explanation:

~ Here we can see that this problem is set to be so that compound interest is applied ~

1. If compound interest is to be applied, it would be that the "20 percent" is the interest, the principle number ( start value ) ⇒ 12 feet in height, and the time is 10 years.

2. Let us approach this problem step by step. Instead of substiting values into a compound interest formula, let us simply attempt a variation of that process...

3. 20 percent is, in a decimal form, ⇒ 0.2

4. Now add 1 to this value 0.2, to get ⇒ 1.2

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6. Now let us multiply this infinite value 6.19...... by the principle quantity 12 feet ⇒ 6.191736422.......... * 12 = <em>(About) 74.30083707.......</em>

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6 0
2 years ago
The gas mileage for a certain vehicle can be approximated by m=−0.05x2+3.5x−49, where x is the speed of the vehicle in mph. Dete
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Answer:

<h2>14mph</h2>

Step-by-step explanation:

Given the gas mileage for a certain vehicle modeled by the equation m=−0.05x²+3.5x−49 where x is the speed of the vehicle in mph. In order to determine the speed(s) at which the car gets 9 mpg, we will substitute the value of m = 9 into the modeled equation and calculate x as shown;

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Dividing through by 5;

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Using the general formula to get x;

a = 1, b = 70, c = -1160

x = -70±√70²-4(1)(-1160)/2

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x = -70±(√4900+4640)/2

x = -70±√9540/2

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x = -70+97.7/2

x = 27.7/2

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Hence, the speed(s) at which the car gets 9 mpg to the nearest mph is 14mph

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