MATHEMATICS HIGH SCHOOL

If pqr = 1 , rst = 0 , and spr = 0, which of the following must be zero?A. P
B. Q
C. R
D. S
E. T

Answers

Answer 1
Answer: P,Q,R can't be 0, because their product is nonzero. Either of S and T could be 0, but the third one only works if S is 0.

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Solve for x. x² + 6x + 9 = 12 ​​ ​ x=−9±4 √3 ​ ​​ ​ x=−3±4 √3 ​ ​ ​ x=−9±2 √3 ​ x=−3±2 √3

Answers

Answer:

9

Step-by-step explanation:

x2+3x+3x+9=12

(x+3)(x+3)=12

x+3=12

x=9

If you know the area of a rectangle can you predict its perimeter? Explain

Answers


No.  The area doesn't tell you the dimensions, and you need
the dimensions if you want the perimeter.

If you know the area, you only know the product of the length and width,
but you don't know what either of them is.

In fact, you can draw an infinite number of different rectangles
that all have the same area but different perimeters.

Here.  Look at this.
I tell you that a rectangle's area is 256.  What is its perimeter ?

-- If the rectangle is 16 by 16, then its perimeter is 64 .
-- If the rectangle is 8 by 32, then its perimeter is 80 .
-- If the rectangle is 4 by 64, then its perimeter is 136 .
-- If the rectangle is 2 by 128, then its perimeter is 260 .
-- If the rectangle is 1 by 256, then its perimeter is 514 .
-- If the rectangle is 0.01 by 25,600 then its perimeter is 51,200.02
Because of the correlation of its width and length. In a rectangle length are equal, the same for the width.

Mark Pryor, who lives in the Eastern Time Zone, placed a phone call at 7:00 A.M. to his uncle, who lives in the Pacific Time Zone. What time was it in the Pacific Zone when he called? Include A.M. or P.M. in your answer.

Answers

In the Pacific Zone was 4: 00 A.M. when he placed the phone call.

Hope it is helpful :)

Solve each equation.Show your work.
Can someone help me please??​

Answers

Answer:

1/2a = -5

a = (-5 x 2) : 1

a = -10

8 - b = 9,5

b = 8 - 9,5

b = -1,25

0,1 = -10c

c = 0,1 : -10

c = -0,01

I hope it's helpful.

The graph of the equation ax+3y=48 passes through the point (-3, 14). what value of A accurately completes the equation

Answers

Answer:

The value of a = -2

Step-by-step explanation:

Given the equation: ax + 3y =48   .....[1] and it is passes through the point (-3, 14).

To find the value of a which completes the equation;

Substitute the point (-3 , 14) i.e, x = -3 and y = 14 in [1] to solve for a;

a(-3) + 3(14) = 48

or

-3a + 42 = 48

Subtract 42 from both sides we get;

-3a + 42 -42 =48 -42

Simplify:

-3a = 6

Divide both sides by -3 we get;

a = -2

Substitute this value in [1] to completes the equation:

-2x + 3y =48

therefore, the value of a = -2 accurately completes the equation -2x + 3y =48
try a=-2 (negative 2)

working attached

Simplify (7-5i)(-3+9i)-(5+6i)^2

Answers

(-21 + 63i + 15i - 45i^2) - (25 + 60i + 36i^2) =

(-21 + 78i + 45) - (-11 + 60i) =

24 + 78i - 60i + 11 =

35 + 18i
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