Alex scored 20% in his maths test
if the test was out of 40 what was his score?

Answer:

282

Step-by-step explanation:

282

Answer:

The conclusion is not correct

Step-by-step explanation:

At first it might seem as though the conclusion is correct, seeing as the table has the correct input and is done correctly, but it is the wording of the second sentence next to the table. The question says "you ask 100 randomly chosen high school students..." , Yet the second sentence says "You conclude that 15% of Residents in your town..." Therefore, they aren't relevant to the graph which means the conclusion is wrong

Answer:

y = 3x + 3

Step-by-step explanation:

Slope = (y2 - y1) ÷ (x2 - x1)

y-intercept = (0,y)

Answer:

a= 40, b= 50, c= 115

Step-by-step explanation:

a-

There is a theorem for a that gives you the answer:

Vertical angles are congruent

If the vertical angle of a is 40°, then a is also 40°.

That is what the theorem says.

b-

This one is kind of difficult, but let me break down the steps.

Now you already know that a is 40°, and the other angle besides b is a right angle because it shows a square, or 90°.

And now you need to know another law:

Every single triangle's angle adds up to 180°.

Now, this is basically a subtraction problem.

If two of the angles are there, and you know that all of the angles of a triangle add up to 180°, then you just need to know what 90 + 40 + x = 180 is

90 + 40 = 130

130 + x = 180

Subtract 130 from both sides

130 + x = 180

-130        -130

x=50, which means that all of the angles add up to 180°, or following the law.

c-

This one is different as well.

You can very clearly see that it is a straight line that crosses 65° and c.

There is one more law as well:

A straight line is 180°.

If that line that 65 degrees and c sits on is straight, that means that-

65 + x = 180, or

180 - 65 = x

180-65 = 115, and c=115.

It also follows that law; 115 + 65 = 180, which means that it is correct.

Hope this helps :)

-jp524

Answer:

15

Step-by-step explanation:

Equation to remember:

Length · Width · Height = Volume

LWH = V

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

In this word problem, you can find that we're missing the height aspect of the equation. Your equation would look something like this:

[tex]12 * 10 * h = 1800[/tex]

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

Work:

[tex]12 * 10 * h = 1800\\\\120h = 1800\\\\\frac{120h}{120} = \frac{1800}{120}\\\\h = 15[/tex]

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

As you can see, the height of our rock is 15cm.

I hope this helped!

Sincerely,

Your Friendly Neighborhood

Middle School Math Teacher!

Answer:

C

Step-by-step explanation:

Its because it goes + 4, 8, 12, 16, etc. And 4 x the length of its sides 4x1, 4x2, 4x3, 4x4.

Hope this helps!

Answer:

I would start at ( -2, -0) and make a line

Step-by-step explanation:

Answer:

1). y = -3 - 7
2). 1/4
3). 1. 117° 2. 63°
4). There are 42 students in the yearbook club and 61 in the drama club
5). 1). both are 45 ° 2). both are 3 units

Step-by-step explanation:

Answer:

It is 19.7, Simplified

Step-by-step explanation:

For more, add the "Boxes" because, I don't know what you mean by "the boxes"

Answer:

neon: 0 percent change    oxide: -2 percent change   copper: 2 percent change   tin: 0 percent change

Step-by-step explanation:

Neon: -10+10=0

Oxide: -10+8=-2

Copper: -27+29=2

Tin: -50+50=0

Hope this helps

Answer:

d = -1000

Step-by-step explanation:

-88,000/88 = -1000

-1000 ⋅ 88= −88,000

Answer:

d = −1,000

Step-by-step explanation:

d*88= −88,000

88d = −88,000

/88         /88

d = −1,000

Hope this helps!

Answer:

30.99 inHg.

Step-by-step explanation:

First, subtract how much the pressure dropped on Tuesday from Monday's reading. 30.01 inHg - 0.34 inHg = 29.67 inHg

Then, add how much the pressure climbed on Wednesday to Tuesday's reading. 29.67 inHg + 1.32 inHg = 30.99 inHg

Answer:

The barometric pressure reading for Wednesday was 31.01inHg. This can be calculated by subtracting 0.34inHg from the pressure reading on Monday (30.01inHg) and then adding 1.32inHg, which results in 31.01inHg.

Answer:

The mean number of cups of coffer per person was 3.2 cups.

There is nothing in the problem that leads me to believe that the surveys were biased (Was there more to this problem?).

Therefore, we will use all of the values to find the mean. Add up all the values and we have a total sum of 48. Now, divide by 15 to get a mean on 3.2.

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

The person above is wrong

Answer:

its very easy dude like come on this is like 4rth grade stuff

Answer:

Part A = 20 Students

Part B = 6 Students

Part C = 2/9x I believe

Part D = 4 and 2/3 or 4 Students because you can't have 2/3 of a student.

Step-by-step explanation:

Answer:

60% of 20 is 12

Step-by-step explanation:

60 / 100 * 20 = 12

Answer:

53

Step-by-step explanation:

right cone equation: [tex]V=\pi r^{2} \frac{h}{3}[/tex] where V is volume, r is radius, and h is height.

Answer: The first question is the first option and the second one is is explained below:

Step-by-step explanation:#2

When you are doing Dilation, You have to rotate the paper or whatever

about 3 times so and then make your mark as needed.

Answer:

a=2.8

Step-by-step explanation:

Answer:

(3/4 * 12a) + (3/4 * 8) = 31.2

                               a = 2.8

Step-by-step explanation:

[tex](\frac{3}{4}*-)+(-*8)=-[/tex]

[tex]\frac{3}{4} (12a + 8) = 31.2\\\\\frac{3}{4} (12a)+\frac{3}{4} (8)=31.2\\\\9a+6=31.2\\\\\ \ \ -6 \ \ \ \ \ \ \ \ -6\\\\9a = 25.2\\\\/9 \ \ \ \ \ /9\\\\a=2.8[/tex]

Answer:

(3/4 * 12a) + (3/4 * 8) = 31.2

                               a = 2.8

Hope this helps!

Answer:

A'' (-1,5)

B'' (0,1)

C'' (-3,-1)

Step-by-step explanation:

For A,

Step 1, (2,2) change to (-2,2), cuz if reflect in y-axis, positive value of x will change to negative value of x, negative value of x will change to positive value of x.

Step 2, (-2,2) change to (-1,5), cuz we add up the 1 to x-value, add up 3 to y value.

For B,

Step 1,

(1,-2) to (-1,-2)

Step 2,

(-1,-2) to (0,1)

For C,

Step 1,

(4,-4) to (-4,-4)

Step 2,

(-4,-4) to (-3,-1)

Answer:

no

Step-by-step explanation:

The reason is if you have to add 3/4 + 7/12 you would have to convert it to have the same denominator for both fractions.

Hope this Helps!

Answer:

Grocery store is the correct one ...

brainleaist please

Answer:

Yes it is grocery store.

Step-by-step explanation:

Answer:

x - 5 ≤ 0,  x  + 13 ≥ 0  

Step-by-step explanation:

All numbers such that x≤5.

x - 5 ≤ 0

All numbers such that x≥−1.3.

x  + 13 ≥ 0  

The absolute value equations in the form of  |x-b|= c(where b is a number and c can be either a number or an expression) that has the following solution set

all numbers such that x ≤ 5 and all numbers such that x ≥ -1.3 will be x -5 ≤ 0 and x + 1.3 ≥ 0.

Isolate the absolute number on one side of the equation to solve an equation containing the absolute value.

Then, resolve both equations by changing their respective contents to the positive and negative values of the variable on the other side of the equation.

In another word, the absolute value equation is the equation that has a real absolute value not imaginary and not binary.

In the mode function, it could be two values if the mode is going negative or positive.

Given that the equation |x-b| = c and constraint is

all numbers such that x ≤ 5

all numbers such that x ≥ -1.3

so by substituting we will get x -5 ≤ 0 and x + 1.3 ≥ 0.

For more information about the absolute value equation

https://brainly.com/question/2166748

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Answer:

D - 8

Step-by-step explanation:

V= 4/3 x pie x radius to the 3rd power

V = 4/3 x 3.14 x 1.25 to the 3rd power

V = 4/3 x 3.14 x 1.953125

V = 4.18666666667 x  1.953125

V = 8.17708333333

Rounded is 8

Answer:A TRUE B FALSE C FALSE

Step-by-step explanation:

Answer:

w = 7, and w = 8 is correct

Step-by-step explanation:

1. Why 5 does not work

a. Substitute 5 into the equation

5w-10>20 --> 5(5) - 10 > 20

b. Solve the equation

Remember Pemdas:

P- Parentheses First

E- Exponents Second

M- Multiplication Third

D- Division Fourth

A- Addition Fifth

S- Subtraction Sixth

We are not working with Exponents and Parentheses, but we are working with the rest.

Since there is no P and E, that means that multiplication is first

5(5)-10>20 - 5(5) = 5 x 5 = 25

Now all is left is to subtract:

25 - 10 = 15

15 > 20 Is not true.

2. Why 6 does not work

a. Substitute

5w-10>20 --> 5(6) - 10 > 20

b. Solve

5(6) = 5 x 6 = 30

30 - 10= 20

20 > 20 is not true

Just like you are not greater than yourself, 20 can not be greater than its own self.

3. Why 7 and 8 work (7a, 7b is 7; 8a, 8b is 8)

7a. Substitute

5w-10>20 --> 5(7) - 10 > 20

8a. Substitute

5w - 10 >20 --> 5(8) - 10 > 20

7b. Multiply and subtract

5(7) = 5 x 7 = 35

35 - 10 = 25

25 > 20

25 is greater than 20

8b. Multiply

5(8) = 5 x 8 = 40

40 - 10 = 30

30 > 20

30 is greater than 20

Hereby, w = 7, and w = 8

Hope this helps

-jp524

Answer:

it is c

Step-by-step explanation:

im is smart

To measure the center, median is the best method.

The value that divides the mathematical numbers or expressions in half is known as the median. The middle data point is known as the median value.

To find the median:

First, organize the data points in ascending order before calculating the median.

The middle number on the list is the median if the number of observations is odd.

Take the value of the (n+1)/2-th term, where n is the total number of observations, to determine this.

Otherwise, the median is the simple average of the middle two figures if the number of observations is even.

Therefore, the median is the best method to find the measure of the center.

To learn more about the median;

https://brainly.com/question/28060453

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Answer:

The symbol ∼ is used to indicate similarity.

Step-by-step explanation: