MATHEMATICS HIGH SCHOOL

Evaluate x-(-11) for x = 14.

Answers

Answer 1

Answer:

Step-by-step explanation:

x-(-11)

= x+11

= 14+11

= 25

Answer 2

Answer: The answer for this question is 25

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How do you substitute x+7y=0 into 2x-8y=22

Answers

First solve for x in the first equation

x + 7y = 0
x = -7y

since x = -7y we can substitute -7y into the other equation wherever there is an x

2x - 8y = 22
2(-7y) - 8y = 22
-14y - 8y = 22
-22y = 22
y = -1

Now let's substitute -1 back into either of the original equations so we can solve for x

x + 7y = 0
x + 7(-1) = 0
x - 7 = 0
x = 7

So your solution set is

(7, -1)

A rectangular field has an area of 1,764 m2. The width of the field is 13 m more than the length. What is the perimeter of the field?

Answers

Answer:

170.

Step-by-step explanation:

We have that A = W*L where A= Area, W= width, L=length and that W = 13+L. So,

A = (13+L)*L

1764 = 13L + L^2

L^2 + 13L - 1764 = 0.

We use the general formula in the image where a=1, b=13 and c= -1764.

$L1= \frac{-13+\sqrt[2]{169-4*(-1764)} }{2}$

$L1= \frac{-13+\sqrt[2]{7225} }{2}$

$L1= (-13+85)/(2)$

$L1= 36.$

$L2= \frac{-13-\sqrt[2]{169-4*(-1764)} }{2}$

$L2= (-13-85)/(2)$ , this result will be negative and the problem is about length so it doesn't apply for this problem. We use L1= 36.

Then, L=36, W = 13 + 36 = 49. Therefore, the perimeter is 2L+2W = 72+98=170.

Hello,
Here in France we call length the greater side of a rectangle.
So:
Let a the greater side
b the shortest

a=b+13
a*b=1764
==>b*(b+13)=1764
==>b²+13b-1764=0
==>b=(-13-85)/2 to exclude
or (b=(-13+85)/2=36 and a=36+13=49)

P=2(a+b)=2(36+49)=170 (m)
Proof:
49-36=13
36*49=1764

What is 2/4 + 6/8 + 2/4 + 15/24 + 7/8

Answers

Answer:

13/4

Step-by-step explanation:

n a right triangle, the tangent of angle A is 912 and the cosine of angle A is 1215. Based on these values, what is the sine of angle A? A 915 B 1516 C 1115 D 11120

Answers

Answer:

Option A $sin(A)=(9)/(15)$

Step-by-step explanation:

we know that

$tan(A)=sin(A)/cos(A)$

Solve for sin(A)

$sin(A)=tan(A)cos(A)$

we have

$tan(A)=(9)/(12)$

$cos(A)=(12)/(15)$

substitute

$sin(A)=(9)/(12)((12)/(15))$

$sin(A)=(9)/(15)$

Final answer:

The sine of angle A can be found using the relationship between the tangent and cosine of angle A. By substituting the given values into the sine identity, we can determine that the sine of angle A is 915.

Explanation:

To find the sine of angle A, we can use the trigonometric identity: sin A = opposite/hypotenuse. Given that the tangent of angle A is 912 and the cosine of angle A is 1215, we can use the relationship between these trigonometric functions. Since tan A = opposite/adjacent and cos A = adjacent/hypotenuse, we can substitute these values into the identity to solve for the sine of angle A.

From tan A = 912, we can rearrange the equation to get opposite/adjacent = 912.

From cos A = 1215, we can rearrange the equation to get adjacent/hypotenuse = 1215.

Substituting these values into the sine identity, we get sin A = opposite/hypotenuse = (912)(1215).

Therefore, the sine of angle A is 915.

Learn more about Trigonometry here:

brainly.com/question/11016599

#SPJ3

Point G is the center of the small circle. Point X is thecenter of the large circle. Points G, H, and X are on line
segment GX
What would be the area of a new circle that has line
segment GX as its diameter?
160 cm?
367 cm?
Oo oo
491 cm?
98
cm

Answers

Answer: 49 pi cm^3

Step-by-step explanation: took the test

Joe has 18 mortals all the marbles are either black or gold there are four more gold marbles and black how many black marbles are there

Answers

Ok so divide 18 and 2.

Subtract 4 from the black marbles then add the 4 marbles to the gold and you will get your answer.

Answer: 5 black Marbles.

Hope this helped!

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