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Umnica [9.8K]
3 years ago
10

What numbers multiplie to equal -30 but add to equal -1

Mathematics
1 answer:
VashaNatasha [74]3 years ago
5 0

Answer:

5 and -6.

Step-by-step explanation:

When you add 5 and -6, you get -1. When they are multiplied, you get -30. I just did this by finding all of the factors that went into 30 and making one negative.

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There are 20 trees in a park. There are 7 maple trees and 9 oak trees. The rest are elm trees. How
den301095 [7]

Answer:

4

Step-by-step explanation:

20 - 7 - 9 = 4

5 0
2 years ago
If a leaf on the ground is 80 feet from the base of a tree, and the angle of elevation to the top of the tree from the leaf is 4
rusak2 [61]

Answer:

82.8424 feet

Step-by-step explanation:

The leaf, the base of the tree and the top of the tree form a triangle.

The adjacent cathetus to the 46 degrees angle is 80 feet. The opposite cathetus to the 46 degrees angle is the tree height that we want to know. So, using the relation between the opposite cathetus and the adjacent cathetus (so the tangent of the angle), we can find the tree height (h):

tan(46) = h/80 = 1.0355

h = 80*1.0355 = 82.8424  feet

6 0
3 years ago
Read 2 more answers
Given that tan0= -1, what is the value of sec0, for 3pi/2<0<2pi?
Maru [420]

Answer: Choice B. sqrt(2)

Draw out a right triangle in quadrant IV as you see in the attached image below. The horizontal and vertical legs are both 1 unit long. To ensure that the signs are properly set up, I am making the vertical leg BC have a label "-1" to mean this is below the x axis. Note how

tan(theta) = opposite/adjacent = BC/AB = -1/1 = -1

Use the pythagorean theorem to find that the hypotenuse AC is sqrt(2) units long

a^2 + b^2 = c^2

(1)^2 + (1)^2 = c^2

2 = c^2

c^2 = 2

c = sqrt(2)

The secant of theta is the ratio of the hypotenuse over the adjacent side, so we end up with

sec(theta) = hypotenuse/adjacent

sec(theta) = AC/AB

sec(theta) = sqrt(2)/1

sec(theta) = sqrt(2) which is why choice B is the answer

7 0
3 years ago
Read 2 more answers
Hemanta bought a pen of Rs 75 and sold it at a profit of Rs 3.80. What is the selling price of the pen?
Brilliant_brown [7]

Answer:

78.80

Step-by-step explanation:

just add the two values

4 0
2 years ago
CAN SOMEONE PLS HELP ME (ill give brianlsit)
blsea [12.9K]

Answer:

x=3(one solution)

Step-by-step explanation:

2x+2=3x-1

subtract 2 from both sides

2x=3x-3

subtract 3x from both sides

-x=-3

divide both sides by -1

x=3

6 0
3 years ago
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