3 years ago

ABC ∆ where Angle A =90° , AB = 12 m, AC = 9 m . Find BC ?

Mathematics

1 answer:

Setler [38]3 years ago

6 0

Answer:

15m

Step-by-step explanation:

Use Pythagoras

Folow the steps in the image

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Solve the following equation <br><br>6x-1=3 (2x+4)-1

DIA [1.3K]

$6x - 1 = 3(2x + 4) - 1$
Distribute
$6x - 1 = 6x + 12 - 1$
Combine like terms
$6x - 1 = 6x + 11$
Add 1 and subtract 6x from each side
0 = 12
The equation has no real solution

4 0

3 years ago

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Sandy is upgrading her Internet service. Fast Internet charges $45 for installation and $49.45 per month.

butalik [34]

Answer:

x = 6 months.

The equation is given by $45 + ($49.45 × x) = ($56.95 × x).

Step-by-step explanation:

i) Let x be the number of months of Internet Service purchased till the Fast

Internet charges and Quick Internet charges become the same.

ii) Charges for Fast Internet for x months is given by $45 + ($49.45 × x)

iii) Charges for Quick Internet for x months is given by ($56.95 × x)

iv) According to the first statement we will now equate the equations in ii)

and iii) and solve for x.

Therefore, $45 + ($49.45 × x) = ($56.95 × x)

45 + 49.45 x = 56.95 x

Therefore (56.95 - 49.45) x = 45

7.50 × x = 45

Therefore x = 45 ÷ 7.5 = 6

6 0

4 years ago

For an angle θ with the point (−5, −12) on its terminating side, what is the value of cosine?

viva [34]

Answer:

option C. $-\frac{5}{13}$

Step-by-step explanation:

we have that

The point (-5,-12) belong to the III quadrant

The value of the cosine is negative

Applying the Pythagoras Theorem

Find the value of the hypotenuse

$h^{2}=5^{2}+12^{2}\\ h^{2} =25+144\\ h^{2}=169\\h=13\ units$

The value of cosine of angle θ is the ratio between the side adjacent to angle θ and the hypotenuse

$cos(\theta)=-\frac{5}{13}$

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3 years ago

3. How many turning points does the graph P(x) = (x-7)(x + 4)(x-2)

mixer [17]

Answer:

The y intercept in P(x) =4

1.C

3.B

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3 years ago

Need help with this stuck on another problem

Cerrena [4.2K]

just remove perenthesis

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3 years ago