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sweet [91]
3 years ago
9

Solve x2 - x - 30 = 0 by factoring.

Mathematics
1 answer:
likoan [24]3 years ago
4 0

Answer:

x=6, x=-5

Step-by-step explanation:

Factoring this quadratic gets you (x-6)(x+5)=0, for this to be possible, either x-6 or x+5 has to be zero, so therefor x is 6, or x is -5

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A 15-foot ladder leans against a house. The bottom of the ladder is 7 feet from the house. To the nearest degree, what angle doe
max2010maxim [7]
The ladder is forming a right triangle with the house. In this right triangle the hypotenuse is the measure of the ladder, and the distance between the house and he ladder is one of the sides of the triangle. To find the angle, \alpha, that the ladder is making with the ground, we are going to use a trig function that relates the adjacent side of our angle with the hypotenuse. That trig function is Cosine. 
Cos \alpha = \frac{adjacent.side}{hypotenuse}
Cos \alpha = \frac{7}{15}
\alpha =arcCos( \frac{7}{15} )
\alpha =62.2

We can conclude that the ladder make with the ground a 62° angle.
7 0
2 years ago
I need help on iready
kicyunya [14]

Answer:

the answer is 3

Step-by-step explanation:

because if you do the methoes method you know that it rules out 1 and 2 after you do that its just between 3 and 4, for the caunususicon there has to be one, that is why i think its 3. hope this helps!

7 0
3 years ago
Joe borrowed $8,000 from the bank at a rate of 7% simple interest per year. How much interest did he pay in 5 years?
belka [17]
Joe would be paying $700 in 5 years time.

Explanation:

($2,000)(0.07/year)(5 years)
= ($2,000)(0.07)(5)
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8 0
3 years ago
Read 2 more answers
Elliott took a survey for Turkey Filet. 18 students prefer turkey tenders and 12 students prefer fried turkey sandwiches with pi
Natalka [10]

Answer: 60%

Step-by-step explanation: multiply 18 by 100 than divide by 30

6 0
3 years ago
Solve the following equation y= 3/2x-50 when y=7.
gavmur [86]

Answer:

3/2x - 50 = 7

3/2x = 57

x = 38

Step-by-step explanation:

sorry if its wrong

6 0
3 years ago
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