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Zarrin [17]
2 years ago
7

PLEASE HELP ITS DUE TODAY!

Mathematics
1 answer:
Anton [14]2 years ago
3 0

Answer:

1. 11(2r+1

2.16(2+1)

3.9(c+4)

4.14(3k+2)

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If two angles of a triangle are 10 degrees and 20 degrees, then the triangle is ????​
Wewaii [24]

Answer:

Scalene

Step-by-step explanation:

Because all triangular angles add up to 180 degrees.

10+20=30

180-30=150

None of those angles are the same.

5 0
2 years ago
Read 2 more answers
Find the vertex of the graph of f(x) = x2 + 4x - 5.
Fofino [41]
You can solve this in two ways.

1. Graphical. Plot the graph for x between -5 and 1 (see attachement).
The vertex of the graph is the peak of the curve, which has the coordinates x=-2, y=-9.

2. Analytical. Calculate the derivative of the function f(x)
\frac{df}{dx}=2x+4
Solve the equation:
2x+4=0
will give the solution x=-2.
Replace x=-2 in the f(x) function and you'll get the value of y:
(-2)^2+4 \cdot (-2)-5=4-8-5=-9

You get the same answer: x=-2, y=-9

So the answer is
<span>B. (-2, -9)</span>

7 0
3 years ago
The sale price of a used car is $4,160 after a 35% discount. What is the original price of the car?
erik [133]

Answer: The original price was $6,400

Step-by-step explanation: To find the original price, divide the sale price by 1 minus the discount rate:  4160 / (1- 0.35) =  4160 / 0.65 = 6400

mark brainliest?? plz :)

3 0
3 years ago
The Student Recreation Center wanted to determine what sort of physical activity was preferred by students. In a survey of 68 st
KengaRu [80]

Answer:

3) We are 95% confident that the proportion of all students at the university who prefer outdoor exercise is between 0.6139 and 0.8272.

5 0
3 years ago
What is the lowest term for 10/12
Studentka2010 [4]

Answer:

5/6

Step-by-step explanation:

Find the lowest common denominator between the 10 and 12.

10 and 12 have the lowest common denominator of 2

10/2=5

12/2=6

So 5/6 is the lowest term of 10/12

3 0
3 years ago
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