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4 years ago

If a = 3 and b = 5.what is the value of a2 + B2?

Mathematics

2 answers:

mariarad [96]4 years ago

3 0

Answer:

Step-by-step explanation:

If you replace the variables with what they equal and multiply then you should get 6+10 which equals 16.

Marysya12 [62]4 years ago

3 0

Answer:

The answer I received for your equation is 16

Step-by-step explanation:

Step 1) Replace your variables with the given number and rewrite your problem: 3 * 2 + 5 * 2 = __

Step 2) Solve from left to right: 3 * 2 = 6 , 5 * 2 = 10

Step 3) Add your two answers: 6 + 10 = 16

Your final answer should be 16.

Hope I helped, Good luck in your future studies :)

-A

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3x+2(4x-4)=3 help pls

Vlada [557]

Answer: 1

Step-by-step explanation:

3x + 8x-8= 3

11x-8=3

Then you move the 8 to the other side and change it to a positive.

11x= 11

11x/11 = 11/11

Answer is 1

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3 years ago

An angle cannot be the complement of one angle and the supplement of another angle at the same time. is this true or false?

soldi70 [24.7K]

An angle cannot be the complement of one angle and the supplement of another angle at the same time. Then the given statement is false.

<h3>What is an angle?</h3>

The angle is the distance between the intersecting lines or surfaces. The angle is also expressed in degrees. The angle is 360 degrees for one complete spin.

Supplementary angle - Two angles are said to be supplementary angles if their sum is 180 degrees.

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Then the given statement is false.

More about the angled link is given below.

brainly.com/question/15767203

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2 years ago

Which of these expressions is equivalent to (12/5) ?

Tom [10]

D is the answer for equivalent

5 0

3 years ago

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Rachel runs 2km to her bus stop, and then rides 4.5 km to school. On average, the bus is 45 km/h faster than Rachel's average ru

Mice21 [21]

Answer:6.042km/h 6km/h approximately

Step-by-step explanation:

First off we have to know the formula relating speed, distance and time which is

Speed = distance/time

Now we are looking for Rachel's running speed

We are to find Rachel's running speed, so let's label is x

We are given that the distance Rachel runs to her bus stop is 2km

We were not given the time she uses to run to the bus stop

So let's label the time Rachel uses to run to her bus stop as y

So from the formula speed = distance/time

We have x = 2/y

Now we are told that the speed the bus uses to get to school is 45km/h faster than her speed used to run

So speed of bus = 45 + x

And the overall time for the whole journey is 25mins, changing this to hours, because the speed details given is in km/h we divide 25 by 60 which will give 0.417

Now if the total time is 0.417 hours, and we labeled the time for Rachel to run to the bus as y, so the time for the time for the bus to get to school will be 0.417 - y

We are also told the bus rides for 4.5km to school

So adding this together to relate the speed, distance and time of the bus with the formula speed = distance/time

We get 45 + x = 4.5/(0.417 - y)

So we have two equations

x = 2/y (1)

45+x = 4.5/(0.417-y) (2)

So putting (1) in (2) we have

45 + (2/y) = 4.5/(0.417-y)

Expanding further

(45y + 2)/y = 4.5(0.417-y)

Cross multiplying

(45y + 2)(0.417 - y) = 4.5y

Opening the brackets

18.765y - 45y2 + 0.834 - 2y = 4.5y

Collecting like terms

-45y2 + 18.765y -2y - 4.5y + 0.834 = 0

-45y2 + 12.265 + 0.834 = 0

Dividing all sides by -45 to make the coefficient of y2 1

y2 - 0.273y - 0.019 = 0

Now we have gotten a quadratic equation, and since it's with decimal numbers we can use either completing the square method of almighty formula

I'm using almighty formula her

For solving

ax2 + bx + c = 0

x = (-b +-root(b2-4ac)/2a

For our own equation, we are finding y

From our our quadratic equation

a = 1, b=-0.273, c = -0.834

you = (-(-0.273)+-root(-0.273-4(1)(-0.019))/2(1)

y = (273+-root(0.151))/2

y = (0.273+0.389)/2 or (0.273-0.389)/2

y = 0.331 or -0.085

So we use the positive answer which is 0.331, because time can't be negative

Then we put y = 0.331 in (1)

x = 2/y

x = 2/0.331

x = 6.042km/h

x = 6km/h approximately

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3 years ago

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AleksAgata [21]

The first term a1 is given to be -4. The formula for the next terms: an = an-1 + 7 means to add 7 to the previous term to get the next.

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4 years ago

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