MATHEMATICS HIGH SCHOOL

Evaluate the expression when a = –1.4 and b = –2.7. |a| + b A.–1.3 B.–4.1 C.4.1 D.1.3

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

|-1.4| + (-2.7) = 1.4 - 2.7 = -1.3 is the solution

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A swimming pool is being drained for maintenance. The volume of water in the pool changes by −12 gallons every minute. What is the change in volume over 90 minutes? Enter the your answer in the box.

Answers

Answer:

Step-by-step explanation:

Answer:

-1080

Step-by-step explanation:

1 min = -12

90 min = 90 * (-12) = - 1080

Katrina drinks 0.5 gallons of water per day which expression shows how to find the number of cups of water she drinks in a week or 16 cups in a gallon

Answers

Answer:

its B for Ed

Step-by-step explanation:
well we know that 1/2 a gallon (or 0.5 gallons) is equal to 8 cups. So one gallon is 16 cups. (keep this in the back of your mind)

Now to find how many cups she drinks in a day, find out how many gallons she drinks in a week.

So 0.5 (7) = 3.5

Now compute to see how many cups are in 3.5 gallons. 

Answer: 56.0001

Understand?

Find the complex number to solve the equation: 9(2-4i) - 6(x+yi) = 14-3iPlease solve and explain in detail.

Answers

9(2-4i)-6(x+yi)=14-3i\n18-36i-6x-6yi=14-3i\n-6x-6yi=-4+33i\n-6x=-4 \wedge -6y=33\nx=(4)/(6) \wedge y=-(33)/(6)\nx=(2)/(3) \wedge y=-(11)/(2)\n\n\boxed{x+yi=(2)/(3)-(11)/(2)i}

Find the value of x.

Answers

X=35 degrees

The angle should measure 90 degrees. We already know if 20 degrees, so we still need 70 degrees more. 2x=70 70/2=35

I don’t understand what to do

Answers

To use a unit circle, you must know where the coordinates are.

For this problem it is asking you where the sin(11pi/6) is.

You look at the unit circle for 11pi/6.

From here you look at the coordinates.

The x value is the cosine and the y value is the sine.

This means that the sin of 11pi/6 is -1/2.

To find the csc or the cosecant you just find 1/sin.

To find the the sec or secant you find 1/cos.

To find the tangent or tan you find the sin/cos.

And to find the cot or cotangent you find 1/tan.

Which of these is a simplified form of the equation 7y + 8 = 9 + 3y + 2y?7y = 6
2y = 1
12y = 17
5y = 17

Answers

put same forms to each sides
7y -5y = 9 - 8
2y = 1

Answer:

2y=1

Step-by-step explanation:

7y + 8 = 9 + 3y + 2y

WE need to simplify it, try to get variable on one side and constant on the other side

7y + 8 = 9 + 3y + 2y

first we combine like terms

3y+2y is 5y

7y + 8 = 9 + 5y

Now to get y terms on one side we subtract 5y from both sides

7y -5y + 8 = 9 + 5y-5y

2y +8 = 9

Now we subtract 8 from both sides

2y +8 -8 = 9-8

2y= 1
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