Debbie scored a total of 504 marks in x tests. After another 3 tests, her total score for all the
tests was 756 marks. If the average score for the first x tests is the same as the average score for
all the tests, find the number of tests that Debbie sat for.

Answer:b

Step-by-step explanation:

Answer:

72

so the second one

Step-by-step explanation:

Triangles area= Base x Height ÷ 2

12x12= 144

144÷ 2 = 72

Answer:

41

Step-by-step explanation:

You have to use Pitagoras.

a^2 + b^2 = c^2

12^2 + 12^2 = c^2

144 + 144 = c^2

288 = c^2

c = √288 = 16.9

P triangle = 16.9 + 12 + 12 = 40.9

Rounded is 41

Answer:

-4/10

Step-by-step explanation:

3/10 + (−7/20)

= 3/10 - 7/10

= -4/10

Answer:

-4/10

Step-by-step explanation:

Subtract the numerators 3 and 7 since we already have the same denominator, 10.

3 - 7 = -4

So, we get -4/10

Answer:

4 cups of sugar

Step-by-step explanation:

2 x 2 = 4

Toya will use 4 cups of sugar.

Answer:

Step-by-step explanation:

Answer:b)true a)true

Step-by-step explanation:

Answer:

For the tickets sold collum, your going to do 1,2,3,4,5,6,7 and for the total revenue, your going to do 34.00 68.00 102.00 136.00 170.00 204.00 238.00

Step-by-step explanation:

Then for ordered pairs, you´re going to do 1, 34.00 2, 68.00 3, 102.00 and so on. Then you graph it, oh and K= 34.00

Answer:

2*16n = 21 -7n

Step-by-step explanation:

hope this helps :)

The statement is True. The average of the draws, which is 71.3, is likely to estimate the average of the box.

However, it is also likely to be off by approximately 0.1 or so.

This is because the sample mean, in this case, serves as an estimate of the population mean.

Due to the sampling variability, the sample mean may not perfectly reflect the true average of the box.

The standard deviation (SD) of the draws, which is about 2.3, gives us an indication of the variability in the sample mean.

Therefore, while the 71.3 is a reasonable estimate, it is expected to have some degree of error or uncertainty around it.

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Answer:

Its Function, but not One-to-one

Answer:

A.) CPCTC (Please mark Brainliest)

Step-by-step explanation:

First triangle is proven congruent then parts are said to be congruent

Answer:

vance got the better deal

Step-by-step explanation:

Answer: Stop and Save

Step-by-step explanation:

Cost of 1 apple at Quick market=1.17/3

                                                      =$0.39

Cost of 1 apple at Stop and Save=1.25/5

                                                        =$0.25

answer: Stop and Save is the better buy.

Answer:

Below.

Step-by-step explanation:

1 / secA+tanA =  1 / [1/cosA+sinA/cosA))]

= 1/ [(1 + sinA)/cosA]

= cosA/(1+sinA)

Now check if this is identical to 1-sinA/cosA:

1-sinA/cosA = cosA/(1+sinA)

Cross multiply:

(1-sinA)(1+sinA) = cos^2A

1 - sin^2A = cos^2A

sin^2A + cos^2A = 1  

This is a known idenity.

So the original identity is true.

Answer:

(2b-1) (b-16)

Step-by-step explanation:

(2b^2-32b)(-b+16)

2b(b-16)  -1(b-16)

Based on the survey data, we can conclude that a higher proportion of teenagers own an iPod or MP3 player compared to young adults.

To determine if the difference is significant, we need to conduct a hypothesis test. We can begin by stating the null hypothesis as "there is no significant difference in the proportion of all teens and young adults who would say they own an iPod or MP3 player."

We can also state the alternative hypothesis as "there is a significant difference in the proportion of all teens and young adults who would say they own an iPod or MP3 player."

Next, we need to determine the test statistic and calculate the p-value to determine if the difference in the proportions is statistically significant. Assuming that the data follows a normal distribution, we can use a two-sample z-test to test our hypothesis.

Using a significance level of 0.05, we find that the test statistic is 3.07, and the p-value is 0.002. Since the p-value is less than the significance level, we can reject the null hypothesis and conclude that there is convincing evidence of a difference in the proportions of all teens and young adults who would say they own an iPod or MP3 player.

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Answer:

Hello! answer: y = 122

Step-by-step explanation:

360 - 116 = 244 244 ÷ 2 = 122 therefore y = 122

Hope that helps!

Answer:

x= z (vertically opposite angles)

x+z= 116

x+x = 116

2x= 116

x=116/2

x= 58

x+y= 180°(straight angle)

58°+y= 180°

y= 180°-58°

y = 122°

Answer:

24

Step-by-step explanation:

give me brainliest pls

Answer:

it represents the following

read in my explanation

Step-by-step explanation:

A bar chart is a graph with rectangular bars. The graph usually compares different categories. Although the graphs can be plotted vertically (bars standing up) or horizontally (bars laying flat from left to right), the most usual type of bar graph is vertical.

The horizontal (x) axis represents the categories; The vertical (y) axis represents a value for those categories. In the graph below, the values are percentages.

Answer:

The unit price in this situation is the approximate cost per pound of clementines. So, the x-axis should represent the number of pounds. The y-axis should represent the cost.

Step-by-step explanation:

Plato correct answer word for word

As per the mentioned informations, there are 4 slip planes associated with each of the 3 unique <111> directions, giving a total of 12 unique {110} slip planes in a body-centered cubic (BCC) crystal

In a body-centered cubic (BCC) crystal, there are 12 slip systems of the {110} type. Each of these slip systems is associated with a unique slip plane.

To understand why there are 12 slip systems, consider that the {110} plane has two perpendicular <111> directions, which are the directions of maximum atomic density in a BCC crystal. Each of these <111> directions can be associated with four equivalent {110} slip planes, which intersect at a line that lies along the <111> direction.

Therefore, there are 4 slip planes associated with each of the 3 unique <111> directions, giving a total of 12 unique {110} slip planes in a BCC metal.

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Answer:

Step-by-step explanation:

59.89

Answer:

Step-by-step explanation:

The answer is 15.

1/5 is 10

1/2 is 25

25+10=35

50-35 is 15, your answer. Hope this helped :)

Answer:

i THINK its 18.75% per year

Step-by-step explanation:

r = (1/8)((3,000/1200) - 1 ) = 0.1875

r = 0.1875 * 100 = 18.75

(dont take my word tho, u should double check yourself)

Answer:

B

Step-by-step explanation:

there are 7 blocks in the whole

the green portion is 3/7

1/2 times 6/7 is equal to 3/7

the answer is B

The algebraic expression is h - 21 = 62

If we let "h" be Holly's original height,

The phrase "Holly's height decreased by 21 is 62" can be translated into an algebraic expression as:

h - 21 = 62

This equation represents the relationship between Holly's original height and her current height, after a decrease of 21 units.

We can solve for h by adding 21 to both sides of the equation:

h - 21 + 21 = 62 + 21

h = 83

Hence, Holly's original height was 83 units.

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Answer:

C

Step-by-step explanation:

4.5 x .60 = 2.7

meaning 4.5 pounds of bananas at .60 a pound would cost 2.7

The area of the triangle is mathematically given as

A=20.8cm

This is further explained below.

The region that is surrounded by the perimeter of the triangle, also known as the three sides of the triangle, is referred to as the area of the triangle.

The space that is encompassed by all three of a triangle's sides is referred to as the triangle's area.

It is computed with the assistance of a variety of formulae that differ according to the kind of triangle, and the results are represented in square units such as centimeters squared, inches squared, and so on.

Generally, the equation for Area the is mathematically given as

A = 1/2 * base * height

Therefore

A= 1/2 * 8 * 5.2

A=20.8cm

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Answer:

Option C

Step-by-step explanation:

Area of the composite figure = Sum of the areas of three rectangles given

                                                = (3x)(x) + 4x + 3(3x)

                                                = 3x² + 4x + 9x

                                                = 3x² + 13x

Since, area of the figure = 82

Therefore, expression representing area of the figure is,

3x² + 13x = 82

Option (C) will be the answer.

Here, x is a variable.

And we can get the value of x by using quadratic formula.

The true statement about b is b = p + q, and about c is c = p*q.

A polynomial function with one or more variables, where the largest exponent of the variable is two, is referred to as a quadratic function. It is also known as the polynomial of degree 2 since the greatest degree term in a quadratic function is of the second degree.

Given a quadratic function, x² + bx + c

and factors of equation is (x + p)(x + q)

for any quadratic equation, the product of factors is equal to the product of a and c,

here a = 1 and c = c

c = p*q,

and the sum of factors is equal to b,

b = p + q.

Hence options A and C are correct.

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To find the solutions by substitution:

1. Clear a variable (x or y) in one of the equations:

As in the first equation the variable y is clear you don't need to clear a variable.

2. Substitute the value of the clear variable in the other equation:

3. Make operations:

4. Clear the variable x:

5. Subtitute the value of the x in the first equation to find the value of y:

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

Answer:

27

Step-by-step explanation:

36*(3/4)

I just put that in a calculator so