Can anybody answer these questions. By the way the questions are seperated in different screenshots that i put.

Answer:

The height of trapezoid is 7km.

Step-by-step explanation:

Given that the area of trapezoid formula is A = 1/2×(a+b)×h where a and b represents the length and h is the height. By substituing the values, you are able to find the height :

[tex]area = \frac{1}{2} \times (a + b) \times h[/tex]

Let a = 4km,

Let b = 8km,

Let area = 42km²,

[tex]42 = \frac{1}{2} \times (4 + 8) \times h[/tex]

[tex]42 = \frac{1}{2} \times 12 \times h[/tex]

[tex]42 = 6 \times h[/tex]

[tex]6h = 42[/tex]

[tex]h = 7 \: km[/tex]

Answer: 7km

Step-by-step explanation:

Answer: $2.75

Step-by-step explanation:

Zeke's helmet cost 3/5 x 28.75 = 17.25

Change = 20 - 17.25 = 2.75

Answer:

2.75

Step-by-step explanation:

Answer:

-3y+8z

Step-by-step explanation:

Here we want to combine all the like terms together to simplify the expression:

2x-2y+5z-2x-y+3z=\\ 2x-2x-2y-y+5z+3z=\\ -3y+8z

Answer:

a

Step-by-step explanation:

Answer: D

Step-by-step explanation:

A and C are linear equations therefore we can eliminate them.

We are left betwen C and D.

C.

x²=25

x=5, x=-5

For C, we can eliminate because when you solve for x, you get 2 linear equations. You may see the x² and think it's linear, but when you solve it, you get 2 linear equations.

We are left with D. Even if you graph it and it doesn't look like a parabola or quadratic, it is still a quadratic equaiton. The 1/ makes it split both ways.

Answer:

0.03

Step-by-step explanation:

0.03>0.0033 (There are more zeroes in 0.0033)

Step-by-step explanation:

0.03 is larger

0.0033

0.03

the 0.03 one is the answer becuase 0.03 is larger than 0.003 since there is one less zero...

Answer:

Slope is 1/2

Step-by-step explanation:

Slope Formula: [tex]\frac{y_{1}-y_{2}}{x_{1}-x_{2}} \\[/tex]

Plug in points: [tex]\frac{4-1}{8-2} =\frac{3}{6}=\frac{1}{2}[/tex]

Answer:

(a) Sample range appears to be a biased estimator since it consistently underestimated the population range.

Step-by-step explanation:

The sample ranges appear to be centered below 32

I got this right on Khan

In this exercise we have to use, in addition to the knowledge of statistics, the graph informed in the exercise in this way, we can say that:

Letter A

When we look at the graph, the maximum points are at 21 and 31, while the samples ranges appear to be centered below 32, that is we can say that the letter A is more appropietate.

See more about statistics at brainly.com/question/10951564

Answer:

30p^3−36p

Step-by-step explanation:

6(5p^3−6p)

=(6)(5p^3+−6p)

=(6)(5p^3)+(6)(−6p)

=30p3−36p

Answer:

Step-by-step explanation:

6(5p^3−6p)

(6)(5p^3+−6p)

(6)(5p^3)+(6)(−6p)

=30p^3−36p

This is not copied i did the work!

Answer:

2m-n / 3mn

Step-by-step explanation:

Answer:

(x (8 x^2 - 20 x + -33))/(2 (x - 3))

Step-by-step explanation:

Simplify the following:

4 x^2 + 2 x - (42 x)/(4 (x - 3))

The gcd of 42 and 4 is 2, so 42/4 = (2×21)/(2×2) = 2/2×21/2 = 21/2:

4 x^2 + 2 x - x/(x - 3) 21/2

Put each term in 4 x^2 + 2 x - (21 x)/(2 (x - 3)) over the common denominator 2 (x - 3): 4 x^2 + 2 x - (21 x)/(2 (x - 3)) = (8 (x - 3) x^2)/(2 (x - 3)) + (4 (x - 3) x)/(2 (x - 3)) - (21 x)/(2 (x - 3)):

(8 x^2 (x - 3))/(2 (x - 3)) + (4 x (x - 3))/(2 (x - 3)) - (21 x)/(2 (x - 3))

(8 (x - 3) x^2)/(2 (x - 3)) + (4 (x - 3) x)/(2 (x - 3)) - (21 x)/(2 (x - 3)) = (8 (x - 3) x^2 + 4 (x - 3) x - 21 x)/(2 (x - 3)):

(8 x^2 (x - 3) + 4 x (x - 3) - 21 x)/(2 (x - 3))

Factor x out of 8 (x - 3) x^2 + 4 (x - 3) x - 21 x, resulting in x (8 (x - 3) x^(2 - 1) + 4 (x - 3) - 21):

(x (8 x^(2 - 1) (x - 3) + 4 (x - 3) - 21))/(2 (x - 3))

2 - 1 = 1:

(x (8 x (x - 3) + 4 (x - 3) - 21))/(2 (x - 3))

8 x (x - 3) = 8 x^2 - 24 x:

(x (8 x^2 - 24 x + 4 (x - 3) - 21))/(2 (x - 3))

4 (x - 3) = 4 x - 12:

(x (4 x - 12 + 8 x^2 - 24 x - 21))/(2 (x - 3))

Grouping like terms, 8 x^2 + 4 x - 24 x - 21 - 12 = 8 x^2 + (-24 x + 4 x) + (-12 - 21):

(x (8 x^2 + (-24 x + 4 x) + (-12 - 21)))/(2 (x - 3))

4 x - 24 x = -20 x:

(x (8 x^2 + -20 x + (-12 - 21)))/(2 (x - 3))

-12 - 21 = -33:

Answer: (x (8 x^2 - 20 x + -33))/(2 (x - 3))

Answer:

Give us a actual equation mate

Step-by-step explanation:

Answer: 5 miles

Step-by-step explanation:

Answer:

91.7

Step-by-step explanation:

V = π x r² x h

V = π x 2² x (8-0.7)

V = π x 4 x 7.3

V = 91.73

Answer:

[tex] \boxed{2 {x}^{2} - 11x + 11} [/tex]

Step-by-step explanation:

[tex] = > ( {x}^{2} - 11x + 6) + ( {x}^{2} + 5) \\ \\ = > {x}^{2} - 11x + 6 + {x}^{2} + 5 \\ \\ = > {x}^{2} + {x}^{2} - 11x + 6 + 5 \\ \\ = > 2 {x}^{2} - 11x + 11[/tex]

Answer:

2x^2 - 11x +11

Step-by-step explanation:

combine like terms

Answer:

60 miles

Step-by-step explanation:

f(x) = 2 + 0,5 * m + 6

38 = 2 + 0,5 * m + 6

38 = 8 + 0,5 * m

30 = 0,5 * m

m = 60 miles

Answer:

The answer is 3.

Step-by-step explanation:

You have to substitute h = 5 into the fraction :

[tex] \frac{ {h}^{2} - 1}{h + 3} [/tex]

Let h = 5,

[tex] = \frac{ {5}^{2} - 1}{5 + 3} [/tex]

[tex] = \frac{25 - 1}{8} [/tex]

[tex] = \frac{24}{8} [/tex]

[tex] = 3[/tex]

Answer:

Step-by-step explanation:

[tex]\frac{h^2-1}{h+3 } \\when~h=5\\\frac{5^2-1}{5-1} =\frac{24}{4} =6[/tex]

Answer:

I think the answer is 8

Step-by-step explanation:

TRUE

FALSE

FALSE

FALSE

FALSE

Answer:

ummm i dont know but try 16 35/21

Step-by-step explanation:

Answer: x^4 /7^3x-6

Step-by-step explanation:

7x^4 * 7^5 / 7^3x

7x^4 * 1 / 7^3x-5

Reduce expression with 7

x^4 * 1 / 7^3x-6

= x^4 / 7^3x-6

Answer:

How many days do you exercise in a week?

Step-by-step explanation:

The topic is students' weekly exercise so the question has to be about that. also, there are up to 7 days worth of data and there a 7 days in a week. so she most likely asked the question, "How many days do you exercise in a week?".

Answer:

B

Step-by-step explanation:

(12g²h⁷)(3g⁻²h⁻⁴) = 12 * 3 * g²⁺⁽⁻²⁾ * h⁷⁺⁽⁻⁴⁾

                            = 36 * g⁰ * h³

                            = 36 * 1 * h³

                            = 36h³

Any variable or constant to the power of zero is 1

a⁰ = 1 ;    12⁰ = 1  ;   (-5)⁰ = 1

51

Step-by-step explanation:

57 + (-6)=51

since 6 is negative you subtract 6 from 57

Answer:

More juice.

Step-by-step explanation:

The difference between the greatest and least amount of juice is that there is more juice in one cup. If this is not the answer you were looking for, please let me know, and I am sorry for the inconvienience.

Answer:

x=236

Step-by-step explanation:

44+80+x=360

x=solve it

Answer:

s = 11.

Step-by-step explanation:

To find the value of 's', we can first use the Supplementary Angles theorem. If '12s' is the measure of the angle outside of the triangle, the angle inside the triangle must be equivalent to '180-12s'.

Since the sum of all of the angles of the triangle must be 180°, we can set up an equation to solve for 's':

180 = 45 + 10s - 23 + 180 - 12s (Subtract both sides by 180)

Simplify:

0= 45 + 10s - 23 - 12s (Subtract both sides by 45, and add 23 to both)

-22 = 10s - 12s

-22 = -2s (Divide both sides by -2)

s = 11.

Answer:

10/3

Step-by-step explanation:

6 length is 2 height.

So 10(6+4) length is 10/3 height

Answer:

x = 10/3

Step-by-step explanation:

These two triangles are similar by AA similarity, as they share angle A, and both have right angles.

Not we can set up a ratio:

6/(6+4) = 2/x

6/10 = 2/x

3/5 = 2/x

Multiply both sides by 5x,

3x = 10

Divide both sides by 3:

x = 10/3