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SashulF [63]
3 years ago
11

WHY is the work they give us online harder than the work we get at school? SOMEBODY PLEASE HELP :(

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
8 0

Answer:

First question

Circle A:

Radius:2.5 Diameter: 5 Circumference:15.71

Circle B:

Radius:12 Diameter:24 Circumference:75.4

Circle C:

Radius:32 Diameter:64 Circumference:201.06

Circle D:

Radius:42 Diameter:84 Circumference:263.89

Second one:

without Pi

1:81.68

2:37.7

3:263.89

with pi

1:26π

2:12π

3:84π

sorry, i have to keep looking back at the photo

for the last question i will be solving ok

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Pls only do this if yk it because i’m giving correct answer brainliest! :))
Leno4ka [110]

Answer:

x=2+\frac{1}{2}\sqrt[]{21}

or

x=2-\frac{1}{2}\sqrt{{21}

Step-by-step explanation:

4x^2-16x-26=-21

Add 21 on both sides.

4x^2-16x-26+21=-21+21

4x^2-16x-5=0

a=4

b=-16

c=-5

x=\frac{-b\frac{+}{}\sqrt[]{b^2-4ac}  }{2a}

x=\frac{-(-16)\frac{+}{}\sqrt[]{(-16)^2-4(4)(-5)}  }{2(4)}

x=\frac{16\frac{+}{}\sqrt[]{256+80}  }{8}

x=\frac{16\frac{+}{}\sqrt[]{336}  }{8}

x=\frac{16\frac{+}{}\sqrt[]{2^2*2^2*21}  }{8}

x=\frac{16\frac{+}{}2*2\sqrt[]{21}  }{8}

x=\frac{16\frac{+}{}4\sqrt[]{21}  }{8}

---------------------------------------------------------------------------

x=\frac{16}{8}+\frac{4\sqrt[]{21}}{8}

x=2+\frac{1}{2}\sqrt[]{21}

---------------------------------------------------------------------------

x=\frac{16}{8}-\frac{4\sqrt[]{21}}{8}\\x=2-\frac{1}{2}\sqrt{{21}

6 0
2 years ago
Read 2 more answers
155 divided by 17. .......
monitta
155 divided by 17 =
9.1176
7 0
3 years ago
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kaleb was playing a video game it took him eight lives to beat the first world it took eight times as many to beat the second wo
KengaRu [80]
Bet its 64,no problem

4 0
3 years ago
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please help!! Drag each pair of equations to show whether the system has no solution, one solution, or infinitely many solutions
Vanyuwa [196]

For the given system of equations, considering different systems are split by ;, we have that:

  • No solutions: 3y = x + 2, 9y = 3x + 7; y = 2x + 3, y = 2x + 5
  • One solution: 2y = 3x, -5y = -10x,; x = 6, y = 9.
  • Infinitely many solutions: y = 5x + 2, 3y = 15x + 6.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

It's equations can be written in the format:

Ax = b

Using the above format, we have that:

  • If A is different from zero, the system has one solution.
  • If A is zero and B is different of zero, the system has no solutions.
  • If both are zero, the system has infinite solutions.

At the first system, multiplying the first equation by -3 and adding with the second, we end up with:

0y = 0x + 2

0 = -2

Which is a false statement, hence it has no solutions.

At the second system, the equations are multiples, hence it has infinite solutions.

At the third system, the coefficients are not zero and are not multiples, and it has one solution.

In the fourth system, the one solution is already given.

At the fifth system, we have that:

2x + 3 = 2x + 5

0x = 2

Hence no solutions.

To learn more about system of equations, you can take a look at brainly.com/question/24342899

5 0
2 years ago
Jacob's favorite movie is 1 5/6 hours long. He says he has watch the movie 5 and a half times. If that is true. How many hours h
34kurt
1\frac{5}{6}=\frac{11}{6}, and when you multiply it by 5 it turns into \frac{55}{6}, which is 9\frac{1}{6}

So in conclusion he watched 9 & 10 minutes watching the movie
3 0
3 years ago
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