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4 years ago

7k-8k=-15 true false open?

Mathematics

1 answer:

zloy xaker [14]4 years ago

7 0

Answer: False

Hope it's helful

Step-by-step explanation:

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Dee Dee bought an Apple for $0. 85, a sandwich for $4. 50, and a bottle of water for $1. 50. How much did Dee Dee spend?

OLga [1]

To figure out how much she spent all we have to do is add up $0.85, $4.50 and $1.50

$0.85 + $4.50 + $1.50 = $6.85

Therefore she spent $6.85

Hope this helps

8 0

3 years ago

Read 2 more answers

Write cot(0) in terms of sin(0) if 0 is in quadrant 2

yuradex [85]

Cot (θ) in term of sin (θ) is cot (θ) = ± √ [ 1 - sin² (θ) ] / sin (θ)

A trignometric function, sometimes known as a circular function, is a function of an arc or angle that is most easily described in terms of the ratios of pairs of sides of a right-angled triangle. Examples of such functions are the sine, cosine, tangent, cotangent, secant, or cosecant.

The trigonometric function cot (θ) can be written as:

cot (θ) = cos (θ) / sin (θ)

Now by using the Pythagorean identity,

sin² (θ) + cos² (θ) = 1

cos² (θ) = 1 - sin² (θ)

cos (θ) = ± √ [ 1 - sin² (θ) ]

Therefore, substituting the value of cos (θ) in the expression of cot (θ).

cot (θ) = cos (θ) / sin (θ)

cot (θ) = ± √ [ 1 - sin² (θ) ] / sin (θ)

Now, cos (θ) < 0 because the angle θ is in the second quadrant,

Therefore,

cos (θ) = - √ [ 1 - sin² (θ) ]

Hence,

cot (θ) = - √ [ 1 - sin² (θ) ] / sin (θ)

Learn more about quadrants here:

brainly.com/question/25038683

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3 0

2 years ago

Why is it important to use the order of operations to evaluate algebraic expressions?

lord [1]

To see your work and be able to check if you have messed up on anything

5 0

3 years ago

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by: P(c)= -12c^2

sveta [45]

Answer:

5 amperes will produce the maximum power

Step-by-step explanation:

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by: P(c)= -12c^2 + 120c.

To find out the maximum power we need to find the vertex

formula to find x -coordinate of vertex is $\frac{-b}{2a}$

P(c)= -12c^2 + 120c is given in the form of y=ax^2+bx+c

a= -12, b = 120

$c=\frac{-b}{2a}=\frac{-120}{2(-12)}=5$

c= 5 amperes will produce the maximum power

3 0

3 years ago

Read 2 more answers

Given log4(3) =0.7925 and log4(5) =1.1610, use log properties to find log4(300).

Ede4ka [16]

Answer:

4.1145

Step-by-step explanation:

You can use the following formula to solve this kind of problems,

$log_{a}(b) + log_{a}(c) = log_{a}(bc)$

So, let's start of with log4_(300). Since the question have already gave log4_(3) =0.7925 and log4_(5) =1.1610. It means that you have to split the 300 into the simplest form where almost all of the numbers are 3 and 5.

$log_{4}(300) = log_{4}(4 \times 5 \times 3 \times 5) \\ = log_{4}(4) + log_{4}(5) + log_{4}(3) + log_{4}(5) \\ = 1 + 1.1610 + 0.7925 + 1.1610 \\ = 4.1145$

5 0

3 years ago