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Sedbober [7]
3 years ago
13

I need help with at least one with an explanation the one with best explanation earns brainliest keep in mind i'm 12 so can you

like write it in a way i'll understand? plz and ty!

Mathematics
2 answers:
scoray [572]3 years ago
5 0
Area of a triangle is base x height so for the first one you would have to do:
A= 6x14
So area equals
84
Igoryamba3 years ago
5 0

Answer:

Triangle:

In order for you to solve all of them you need to multiply the base times the height then divide that in half.

example answer;

3 is 68 because you multiply 17 by 8 then divide in half.

Decomposition of the trapezoid to find the area. You first need to separate the parts of the trapezoid that make a triangles. Ex: separate the outer parts so that you're left with triangle/s and a rectangle/square shape in the middle. Find the area of the triangles and the area of the middle square/rectangle and then add that together.

8. 171 I used this formula A=(a+b)h/2  Which is top length+bottom length times height divided by two.

Trapezoid area:

You need to add the top base and the bottom base together then multiply that by the height.

9. 396. I  used the same formula as the last one. which is A=(a+b)h/2.

I hope I could help you :)

Step-by-step explanation:

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Pls help or i will fail
spayn [35]

Answer:

difficulty frozen. Felix

8 0
3 years ago
Given f(x)=3x2−5x−2 .<br><br> What is the value of f(−23) ?
Sonja [21]

f(x) =  {3x}^{2}  - 5x - 2 \\ f( - 23) = ... \\ f( - 23) \: means \: x =  - 23 \\ so \: f( - 23) =  {3( - 23)}^{2}  - 5( - 23) - 2 \\  = 3(529)  + 115 - 2 \\  = 1700
3 0
3 years ago
When 1,250 Superscript three-fourths is written in simplest radical form, which value remains under the radical?
Dvinal [7]

The value remains under the radical is 8 ⇒ last answer

Step-by-step explanation:

Let us revise how to write the exponent as a radical

  • a^{\frac{m}{n}} can be written as \sqrt[n]{a^{m}}
  • To simplify the radical factorize the base "a" to its prime factors

Example:

  • (54)^{\frac{2}{3}}=\sqrt[3]{(54)^{2}} ,
  • Factorize 54 into prime factors ⇒ 54 = 2 × 3 × 3 × 3 = 2(3)^{3}
  • \sqrt[3]{(54)^{2}}=\sqrt[3]{[2(3^{3}]^{2}}=\sqrt[3]{2^{2}*3^{6}}
  • 2² can not go out the radical because 2 is less than 3 not divisible by 3
  • 3^{6} can go out the radical because 6 is divisible by 3, then divide 6 by 3, so it will be 3² out the radical
  • \sqrt[3]{(54)^{2}}=3^{2}\sqrt[3]{2^{2}}=9\sqrt[3]{4}

Now let us solve your problem

∵ 1250^{\frac{3}{4}}=\sqrt[4]{1250^{3}}

- Factorize 1250 to its prime factors

∵ 1250 = 2 × 5 × 5 × 5 × 5

∴ 1250=2*5^{4}

∴ \sqrt[4]{(2*5^{4})^{3}}=\sqrt[4]{2^{3}*5^{12}}

∵ 2³ can not go out the radical because 3 < 4 and not divisible by it

- 5^{12} can go out the radical because 12 can divided by 4

∵ 12 ÷ 4 = 3

∴ 5^{12} can go out the radical as 5³

∴ \sqrt[4]{1250}=5^{3}\sqrt[4]{2^{3}}

∴ \sqrt[4]{1250}=125\sqrt[4]{8}

∴ The value remains under the radical = 8

The value remains under the radical is 8

Learn more:

You can learn more about the radicals in brainly.com/question/7153188

#LearnwithBrainly

8 0
3 years ago
Find the slope of the line y= -4x - 2/3
IrinaVladis [17]

Hi there!

The general equation of a slope-intercept line is :

y = mx + b

Where "m" is the slope and "b" is the y-intercept.

Since your equation is already in the right form, you can easily see that your "m" is equal to -4, which is the slope of the line.

Your answer is: The slope of the line is -4.


There you go! I really hope this helped, if there's anything just let me know! :)

6 0
3 years ago
There are 999 students in a class: 555 boys and 444 girls. If the teacher picks a group of 444 at random, what is the probabilit
PolarNik [594]

Answer:

0.00397

Step-by-step explanation:

I am taking a guess. Like I saw this example (5/9)(4/8)(3/7)(2/6)=120/3024=0.0397

Or (5C4)/(9C4)=0.0397 - from chisnau

Follow those steps, but add your numbers . I added one zero bassed on the problem: There are 9 students in a class: 5 boys and 4 girls. If the teacher picks a group of 4 at random, what is the probability that everyone in the group is a boy?

Hope I helped in some way!

6 0
3 years ago
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