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3 years ago

Can someone please help me with these 3 questions I’ll mark brainliest

Mathematics

1 answer:

pshichka [43]3 years ago

7 0

Answer:

2/ triple need video for the third answer

Step-by-step explanation:

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HELPP ASaPP I’ll mark you as brainlister

nika2105 [10]

Answer:

BC ≈ 8.9 units

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos36° = $\frac{adjacent}{hypotenuse}$ = $\frac{BC}{AB}$ = $\frac{BC}{11}$ ( multiply both sides by 11 )

11 × cos36° = BC , then

BC ≈ 8.9 ( to the nearest tenth )

5 0

3 years ago

Read 2 more answers

ASAP<br> What is the area of this triangle? <br> E.(5,1) F.(4,0) D. (8,0) <br> Units2

irakobra [83]

The answer is F.(4,0)

8 0

3 years ago

Lemma 2.3.2 (Multiplication is commutative). Let n,m be natural питbers. hen n x m = mхп.

Paraphin [41]

Answer:

Multiplication is commutative.

Step-by-step explanation:

Let n,m be two natural numbers.

We have to show that $n\times m=m\times n$

We will prove this by induction

For n = 1, we have $n\times 1 = 1\times n = n$ , which is true.

Let the given statement be true for n-1 natural numbers, that is,

$(n-1)\times m = m\times (n-1)$

Now, we have to show that it is true for n natural numbers.

$nm = (n-1)m + m = m(n-1) + m$

which is equal to

$(m-1)(n-1) + (n-1) + m$

$= (m-1)(n-1) + (m-1) + n$

$= n(m-1) + n$

$= (m-1)n + n$

$= mn$

Hence, by principal of mathematical induction, the given statement is true for all natural numbers.

6 0

3 years ago

The equation that represents this description is h = 20c + 60 because hours (h) is our dependent variable and cost (c) is our in

MrRissso [65]

Answer:

c= 20h + 60

Step-by-step explanation:

The correct dependent variable for this equation is "c" cost of Mr Z's tutoring. The independent variable is "h" hours of tutoring. This is because the independent variable h hours should determine the cost of tutoring c. Therefore the equation can be interpreted: if there are h hours of tutoring which cost 20 per hour, total cost is equal c. Also slope of the equation is 20, coefficient of h.

8 0

3 years ago

Find the perimeter of each figure

NikAS [45]

Answer:

18ft

Step-by-step explanation:

4 0

3 years ago