MATHEMATICS HIGH SCHOOL

Simplify the expression using the variable replacements.
2a² – 4bifa= 2andb = 1

Answers

Answer 1

Answer:

Answer:

= 4

Step-by-step explanation:

2a^2-4b

=2(2)^2-4(1)

=2×4-4

= 8-4

Related Questions

Solve for D 6/34 = D/68
What is the area of a circle, rounded to the nearest tenth, with adiameter of 12 centimeters?
Estimate each percent 74% of 238
2^x+5 = 3^1-x use logarithms to solve the exponential equation. round answer to 3 decimal places.
Please help asap 20 pts

If A=x+1, B=x^+2x-1, C=2x what is AB+C in simplest form

Answers

(x + 1)(x^2 + 2x - 1) + 2x

x^3 + 2x^2 -x + x^2 + 2x -1 + 2x

x^3 + 3x^2 + 3x -1

Nobody Knows the Answer HELP !!!!! Pleaseeeeeeeeee CLICK & Help Me Solve !!!!!!!!!

Answers

There are 10 total marbles and three are pink. So you are to determine the probability of choosing a pink marble, placing it back in the bag and choosing another pink marble.
The probability of choosing a pink marble is # of pink marbles to # of all marbles which is 3/10. Since we place the marble back in the bag, the probability is the same for the second time.
To determine the probability of both occurrences, we need to multiply 3/10 x 3/10 which is 9/100. This can be written as 9:100 as a ratio.

One point on a line is given the coordinate 5.3. A second point on the line has a coordinate of 8.7.The distance between these points is __________ units.

Answers

Answer: The distance between these points is 5 units.

Step-by-step explanation:

We know that by Distance formula , the distance between two points (a,b) and (c,d) is given by :-

$D=√((d-b)^2+(c-a)^2)$

The given points = (5,3) and (8,7)

The distance between theses points will be :

$D=√((7-3)^2+(8-5)^2)\n\n\Rightarrow\ D=√((4)^2+(3)^2)\n\n\Rightarrow\ D=√(16+9)\n\n\Rightarrow\ D=√(25)=\pm5$

Since , Distance is always positive , it means the distance between the given points is 5 units.

Answer:

3.2

Step-by-step explanation:

The distance formula on a number line is

d= x2-x1

d= 8.7-5.3 =3.2

Angle ADB Is 3 Times Larger Than Angle BDC Mangle ADB= 。 _ Mangle BDC= 。 _ D

Answers

This is your answer. Thanks!

Final answer:

Angle ADB is 3 times larger than angle BDC. By assigning a variable to BDC, an equation can be formed to find the values of both angles. BDC is 45 degrees and ADB is 135 degrees.

Explanation:

The given problem states that angle ADB is 3 times larger than angle BDC. Let's assign a variable to angle BDC, such as x degrees. Since angle ADB is 3 times larger, it would be 3x degrees. The sum of angle ADB and angle BDC is equal to 180 degrees, as they form a straight line.

Therefore, we can write the equation 3x + x = 180 to represent the sum of the angles.

Simplifying the equation, we get 4x = 180. Dividing both sides by 4, we find that x = 45 degrees. Hence, angle BDC is 45 degrees and angle ADB is 3 times larger, resulting in 3 * 45 = 135 degrees.

Learn more about angle relationships here:

brainly.com/question/31825145

#SPJ11

What is the angle between the hour and minute hand when it is 4:20?

Answers

$Look\ at\ the\ picture.\n\n\beta=360^o:12=30^o\n\n(20min)/(1h)=(20min)/(60min)=(1)/(3)\n\n\alpha=(1)/(3)\cdot30^o=10^o\leftarrow answer$

The arc between the 4 and the 5 is (360/12) = 30 degrees.

The hour hand takes a full hour to creep from the 4 to the 5, so it moves
at the rate of ( 30 degrees / 60 minutes ) = 1/2 degree per minute.

In 20 minutes, the hour hand moves (20 x 1/2) = 10 degrees.

At 4:20 , the minute hand is right square on the 4, and the hour hand
is 10 degrees ahead, on its way to the 5 .

The angle between them is 10 degrees.

What is the cosine of 135 degrees?