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Alexeev081 [22]
3 years ago
6

During one term Rachel took 2 mathematics test her mean score was 75 she scored 12 points more on the first test then the second

test how many points did she score on the second test
Mathematics
1 answer:
MaRussiya [10]3 years ago
3 0

Answer: she scored 69 points on the second test.

Step-by-step explanation:

Let x represent the number of points that she scored in the first test.

Let y represent the number of points that she scored in the second test.

If her mean score was 75, it means that

(x + y)/2 = 75

x + y = 75 × 2

x + y = 150- - - - - - - - - 1

If she scored 12 points more on the first test than the second test, it means that

x = y + 12

Substituting x = y + 12 into equation 1, it becomes

y + 12 + y = 150

2y + 12 = 150

2y = 150 - 12

2y = 138

y = 138/2

y = 69

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I need the thing for the square pizza ill give brainlest to who gets its right
baherus [9]

Answer:

A) The square pizza gives you more delicious (XD) pizza. And 24 (225-201) more pizza.

B) There's more crust on the square pizza then on the circle one, according to 60>50!

Step-by-step explanation:

A)First, let's calculate the area of the round pizza.

We need to find out the radius, and radius=\frac{diameter}{2}

So radius=16/2, which is 8.

And a circle's area is \pi r^{2}, so the equation for this round pizza is:

\pi                (8)^{2}

=64\pi

≅201 inch^{2}

Second, we calculate the square pizza's area, which is pretty easy since the equation for a square is: (Side Length)^{2}.

So for this square pizza, the area would be:

(15)^{2}

=225 inch^{2}

Lastly, we compare the two, 225>201, so the square pizza gives you more delicious (XD) pizza. And 24 (225-201) more pizza.

B)So this problem is actually asking you to find the circumference of the circle and perimeter of the square.

Let's start off with the circle, the formula for circumference is:

\pi (d)

We already have the d, (diameter), which is 16, so the circumference of this circle pizza is:

16\pi

≅50 inch

Then we find the a square's, the equation for perimeter is:

4 (side length)

=4(15)

=60 inch

So happily, we found out there's more crust on the square pizza then on the circle one, according to 60>50!

<u><em>Hoped I helped! And hope you can get full credit with my will elongated answer XD.</em></u>

6 0
2 years ago
I need to know if the answer to number 9. Is correct
slava [35]
The answer to number 9 would be 43. 

Since it tells you that there is a straight angle that would equal 180. So I added up 61 30 and 46. I got 137. Then subtracted 137 from 180 and got 43.
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Antisocial personality disorder (ASPD) is characterized by deceitfulness, reckless disregard for the well-being of others, a dim
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3 years ago
Will mark u BRAINLIEST! Please help this is due ASAP
serious [3.7K]

Answer + Explanation:

let x be the measure of angle x

let y be the measure of angle y

\left \{ {{x + y = 180} \atop {x=24+y}} \right.

Now, solve:

plug x = 24 + y into x + y = 180

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y = 78

Now, plug this back into the equation x = 24 + 78

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8 0
3 years ago
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2 years ago
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