MATHEMATICS HIGH SCHOOL

Which shows one way to determine the factors of x3 5x2 – 6x – 30 by grouping? x(x2 – 5) 6(x2 – 5) x(x2 5) – 6(x2 5) x2(x – 5) 6(x – 5) x2(x 5) – 6(x 5)

Answers

Answer 1

Answer:

Answer:

x(x2 + 5) - 6(x2 + 5)

Step-by-step explanation:

hope it help! :D

Answer 2

Answer:

Answer:

Step-by-step explanation:

took test on edg

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Six blood pressure readings are 115, 120, 123, 121, 121, and 112 mm Hg. What is the average (mean) value?

Answers

Answer:

118.666666667 mmHg

Step-by-step explanation:

To find the average/mean of a set of values, you add all the values together, then divide them by the amount of values in the set.

115+120+123+121+121+112 = 712

Since there is 6 values, you divide this by 6.

712÷6 = 118.666666667 mmHg

Hope this helps!

To clean a tank, 3/4 cup of disinfectant is needed for every 2 gallons of water. How many cups of disinfectant are needed for 20 gallons of water?A. 7 1/2
B. 15
C. 22 1/2
D. 30

Answers

Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of gallons of water.”How many cups of disinfectant are needed for 20 gallons of water so c is

I use ratio and proportionchanges 3/4= .75.75 cups/2 gallons= x cups/2o gallonscross multiply2x= 15x= 7 1/2 cupsalso there are 10 gallons for every 3/4 cup10 x 3/4= 30/4= 7 1/2I like ratio and proportion it's more consistent in solving lots of problemshope this helps

Question 3! How to do it?

Answers

Hello,

x/6=tan 60°==>x/6=√3==>x=6√3

Answer B

Evaluate: 20 - {3 × 8 - 5 - (3 - 25 ÷ 5)}

Answers

Answer:

Step-by-step explanation:

To evaluate the expression 20 - {3 × 8 - 5 - (3 - 25 ÷ 5)}, follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders (i.e., powers and square roots, etc.), Multiplication and Division (left-to-right), and Addition and Subtraction (left-to-right):

Inside the innermost parentheses, we have:

3 - 25 ÷ 5

= 3 - 5

= -2

Now, the expression becomes:

20 - {3 × 8 - 5 - (-2)}

Next, perform the multiplication and subtraction inside the innermost braces:

3 × 8 = 24

5 - (-2) = 5 + 2 = 7

The expression becomes:

20 - {24 - 7}

Continue inside the braces:

24 - 7 = 17

Now, the expression becomes:

20 - 17

Finally, subtract:

20 - 17 = 3

So, the value of the expression is 3.

Following the steps of the BODMAS rule, the expression simplifies to -1.

The question involves arithmetic operations such as subtraction, multiplication, and division. The correct order of these operations is dictated by the BODMAS rule, which stands for Brackets, Orders (powers and square roots, etc.), Division and Multiplication (left-to-right), Addition and Subtraction (left-to-right).

According to this rule, begin by calculating within the deepest set of brackets: 25 ÷ 5 = 5. Your expression now becomes: 20 - {3 × 8 - 5 - (3 - 5)}, which simplifies to 20 - {3 × 8 - 5 - -2}. The next step is to calculate the multiplication: 24 - 5 - -2, which further simplifies to 20 - {24 - 5 + 2}, which becomes 20 - {21}, leading to a final result of -1.

Learn more about BODMAS rule here:

brainly.com/question/2898753

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What is the point that lies on a graph for 10y=3x-11. Is it A (2,-.5) B (4,1) C (6,16.3). Or D (8,23)?

Answers

case A : x=2, y=-5
so putting the values of x and y in the equation, we get 10y -3x should be -11
so, 10* (-5) - 3 *2 = -50-6 = -56
case B , value of equation = 10*4 - 3*1 = 37
case C, value of equation = 10*6 -3*16.3 = -11.1
Case D, value of equation = 10*8-3*23 = 11
Ans will be C

Why is the sum of a rational number and its opposite always equal to 0

Answers

because its like saying what's 4-4=0. -4 and 4 are the same distance away from zero, so if you subtract them (or add them), it'll always end up to be zero

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