En un programa de televisión se hacen 30 preguntas. Por cada respuesta correcta se suman 8 puntos, por cada respuesta errónea se restan 5 puntos y por aquellas preguntas que no se contesten no se suman ni se restan puntos. Si un participantes obtuvo 13 puntos, ¿Cuantas respuestas erróneas pudo tener?

Answer:

identity property of addition-

a+0=a

identity property of multiplication-

a*1=a

Step-by-step explanation:

i cant give u an exact answer as u didnt give Micheals answers so i just gave some examples about what addition and multiplication identity property should look like. Identity property's concept is to keep the same identity. Basically, "a" shouldnt change. In addition, to keep a the same all u hv to do is add 0 as anything plus 0 is the same. for multiplication, just multiply by 1. Hope this helps!!

Answer:

He should have added 0 to 8 and multiplied 1 by 8

Step-by-step explanation:

Answer:

x=2

Step-by-step explanation:

2.5(6x-4)=10+4(1.5+0.5x)

Distribute

15x -10 = 10 + 6 +2x

Combine like terms

15x -10 =16+2x

Subtract 2x

13x -10 = 16

Add 10

13x= 16+10

13x = 26

Divide by 13

13x/13 = 26/13

x =2

Answer:

x=2

Step-by-step explanation:

2.5(6x-4)=10+4(1.5+0.5x)

Distribute.

2.5*6x-2.5*4=10+4*1.5+4*0.5x

15x-10=10+6+2x

Combine like terms.

15x-10=16+2x

Add 10 to both sides

15x-10+10=16+10+2x

15x=26+2x

Subtract 2x from both sides.

15x-2x=26+2x-2x

13x=26

Divide both sides by 13

x=2

Answer:

117.00

Step-by-step explanation:

I = prt  where i is the interest , p is the principal r is the rate and t is the time in years

2 years 6 months is 2.5 years

I = 1200 * .039* 2.5

I =117

Answer:

77 in ^2 is the best estimate

Step-by-step explanation:

We can get the total area from the sum of the triangle and the semi circle

semicircle

1/2 the area of the semicircle

A = 1/2  pi r^2

   1/2 (3.14) ( 4^2)

    25.12

Now find the area of the triangle

The base is 16 -r = 16-4 = 12

The height is 8

A = 1/2 bh

   = 1/2 (8) (12)

   = 48

The total area is 25.12+48 =73.12      

Answer:

Congruent angles have the same angle and side measure. Thus angle Q is 47 degrees and PR is 9 cm.

Step-by-step explanation:

Answer:

The answer is A. 2/3 =5/8

Step-by-step explanation:

The proportion that could be used to determine if the figures represent a dilation is 2/3= 5/8. Option A

Dilation is the process of increasing the size of the object without changing its shape and this is with a defined scale factor.

To determine if the figures represent a dilation, we need to compare the ratios of corresponding sides.

The correct proportion to use is the ratio of corresponding side lengths.

Then, we have that the figure;

2/3=5/8

This means that the ratio of corresponding side lengths in the figures is the same, indicating a dilation.

Learn more about dilation at: https://brainly.com/question/10253650

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Answer:

Let's begin by looking at the standard form for the equation of a parabola. The standard form is (x - h)2 = 4p (y - k), where the focus is (h, k + p) and the directrix is y = k - p.

Step-by-step explanation:

hope this helps you :)

Answer:

1/9

Step-by-step explanation:

I'm assuming the equation you mean is y = (x/9)  -- if so, parentheses aren't really required.

The equation for the constant of proportionality is y=kx. So, we will want to find the value of k, which is the constant. The y and x variables are in both equations already, and there is only the 1/9, which is k.

Therefore, the constant of proportionality is 1/9. We can check this answer by putting 1/9 back into the equation. y = 1/9 (x)    or    y=  x/9.

Answer:

1/9

Step-by-step explanation:

None. Just trust me.

Answer:

hi

Step-by-step explanation:

srry

Answer:

The correct answer is a) (6, 3).

Step-by-step explanation:

The midpoint is determined in straight lines by subtracting the larger x-coordinate value and the smaller x-coordinate value. In this case, it is 10 - 2. You earn 8. Then, divide this answer by 2. So, you get 4. Finally, either subtract this from the larger x or the smaller x. You will earn 6. Since you are solving for a straight line, your y-coordinate will be the same as the others. Therefore, A is your answer.

The answer is (6,3)

please see attached picture for full solution

Hope it helps

Good luck on your assignment

Stay safe..

Answer:

X=83°

Step-by-step explanation:

we use cosine law

(8²+16²-17²)÷(2×16×8)=cosC

0.121=cosC

we use cosine inverse to find an angle

cosine^-1 0.121= 83°

The required coordinate of the point N is (-5, -1). Option b is correct.

Given that,
Segment MN is drawn in the coordinate plane. Point M has coordinates (13,9) and the midpoint of MN is the point (4.4). What are the coordinates of point N to be determined.

Coordinate, is represented as the values on the x - axis and y - axis of the graph

Let the coordinate of point N is (x, y).
Here, point M has coordinates (13,9) and the midpoint of MN is the point (4.4).

The Coordinate of the midpoint is given as,
(4 = (x + 13)/2, 4 = (y + 9 )/2)
(x = 8 - 13, y = 8 - 9)
(x = -5 , y = -1 )
Coordinate of point N is (x, y) = (-5, -1)

Thus, the required coordinate of the point N is (-5, -1).

Learn more about coordinate here:

brainly.com/question/13498438

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Answer:

2/7

Step-by-step explanation:

Fraction of children under 10 = 5000 / 17500 (without being simplified).

we can then simplify it to:

50 / 175 = 10/35 = 2/7

Hope this helps.

Please mark brainiest

Answer:

[tex]\frac{2}{7}[/tex]

Step-by-step explanation:

So we know there is a population of 17,500 and 5000 are children under the age of 10. We  want to find the the fraction of the children under 10 over the total population in it's simplest form so,

[tex]\frac{5000}{17500} =\frac{500}{1750} =\frac{50}{175}=\frac{2}{7}[/tex]

Answer:

x = -3

y = 7

Step-by-step explanation:

x + 3y = 18

-3x - 12y = -75

multiply first equation by 4

4 × (x + 3y) = 18 ➡ 4x + 12y = 72

now add the two equations up

4x + 12y - 3x -12y = 72 - 75 (-12y will eliminate 12y)

x = -3

Answer:

Step-by-step explanation:

Attached is the sample space for rolling two dice

Answer:

4 or 5

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

If they have no solutions, the lines must not intersect.

If they don't intersect, they must be parallel

Answer:

A: X=1

Step-by-step explanation:

If DE=2, and E to C is of the same line but is less than half of DE, it has to be the smallest number possible. 6(1)-8=-2

Answer:

Width: 2x+1

Step-by-step explanation:

Answer:

46800

Step-by-step explanation:

46821 nearest 100s

look for the tens it is less than 5 so its 800 and the numbers written before the 100s would remain the same

Answer:

the inverse is f^-1(x)=3x+6

Step-by-step explanation:

Answer:

a) y = 4x^2

Step-by-step explanation:

Because in a) y = 4x^2 the degree of equation is 2.

Answer:

The last one

Step-by-step explanation:

Answer:

4 is the correct answer, I believe.

Reasoning:

The first line must be graphed with a constant y of 3, and stop before -2. Which it does on all 4 graphs.

The third line must, when extended, pass through point (0, -3). Only graph 1 and 4 follow that criteria, so it is not 2 or 3.

The second line's y-intercept must be 2, as well as begin at -2 and end before 2. Only graph 4 correctly plots this equation.

I hope this helps! :)

Answer:

z=-7

Step-by-step explanation:

-9+8*14z+8*2=7*17z+7*8

-9+112z+16=119z+56

112z+7=119z+56

-112z       -112z

7=7z+56

-56    -56

-49=7z

:7     :7

z=-7

Answer:

[tex] \boxed{z = -7} [/tex]

Step-by-step explanation:

[tex] = > - 9 + 8(14z + 2) = 7(17z + 8) \\ \\ = > - 9 + (8 \times 14z + 8 \times 2) = (7 \times 17z) + (7 \times 8) \\ \\ = > - 9 + 112z + 16 = 119z + 56 \\ \\ = > 7 + 112z = 119z + 56\\ \\ = > 7 + 112z - 119z = 56 \\ \\ = > 7 - 7z = 56 \\ \\ = > - 7z = 56 - 7 \\ \\ = > - 7z = 49 \\ \\ = > 7z = - 49 \\ \\ = > z = - \frac{49}{7} \\ \\ = > z = - 7[/tex]

Answer:

300 euros

Step-by-step explanation:

1200 x 5 x 5=30000/100=300

Answer:

£1531.53

Step-by-step explanation:

Times 1200 by 1.05 then times the new answer by 1.05 until done 5 times

Answer:

Step-by-step explanation:

let K be ken's number of marbles

K<10

Ken's number of marbles are fewer than Joe's number of marbles

Answer:

x <10

Step-by-step explanation:

Ken = x

Joe = 10

because  Ken has fewer marbles than Joe and Joe has 10

x <10

Answer:

The answer is 6x^2+9x-15

Answer:

6x^2 + 9x -15x

Step-by-step explanation:

This may seem hard, but it is actually very simple.

When you think of area, you think of multiplying.

The equation for this rectangle is: 3(2x^2+3x-5)

Why is 3(2x^2+3x-5) the equation?

You are basically multiplying the height (3) and all the widths (2x^2, 3x, and -5)

3 x 2x^2 is 6x^2.

3 x 3x is 9x (3 x 3 = 9)

-5 x 3x is -15x (5 x 3 = 15, plus the negative sign)

Now, you will combine the answers and get 6x^2 + 9x -15x

Answer:

-102 i think. sorry if i am wrong

Step-by-step explanation:

Answer:

Step-by-step explanation:

3+5+2=10

3/10 x 300=£90

3/10 x300=£150

2/10 x300=£60

Mary receives £150