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3 years ago

Q3. Kylie sits two maths test. She scores 19/25 in the first one, and 16/20 in the second one.

Mathematics

2 answers:

Rina8888 [55]3 years ago

7 0

She done better at the 2nd test because she only got 4 wrong but on the first test she got 6 wrong.

prohojiy [21]3 years ago

3 0

Answer: Kylie did better in the second one than she did in the first one

Step-by-step explanation:

If you do 19 divided by 25 you will get 0.76 so she got a 76% on the first test. Then if you do 16 divided by 20 you will get 0.8 so she got a 80% on the second test.

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Find the equation of a circle with a center at (7,2) and a point on the circle at (2,5)?

monitta

Answer:

$(x-7)^2+(y-2)^2=34$

Step-by-step explanation:

We want to find the equation of a circle with a center at (7, 2) and a point on the circle at (2, 5).

First, recall that the equation of a circle is given by:

$(x-h)^2+(y-k)^2=r^2$

Where (h, k) is the center and r is the radius.

Since our center is at (7, 2), h = 7 and k = 2. Substitute:

$(x-7)^2+(y-2)^2=r^2$

Next, the since a point on the circle is (2, 5), y = 5 when x = 2. Substitute:

$(2-7)^2+(5-2)^2=r^2$

Solve for r:

$(-5)^2+(3)^2=r^2$

Simplify. Thus:

$25+9=r^2$

Finally, add:

$r^2=34$

We don't need to take the square root of both sides, as we will have the square it again anyways.

Therefore, our equation is:

$(x-7)^2+(y-2)^2=34$

4 0

2 years ago

Simplify fully WITHOUT using a calculator (3√2 -12)(2√2+1)

natita [175]

Answer:

$33\sqrt{2} +12$

Step-by-step explanation:

$(3\sqrt{2} - 12)(2\sqrt{2} + 1)$

$6\sqrt{2} + 3\sqrt{2} -12(2\sqrt{2})+12$

$9\sqrt{2}+24\sqrt{2}+12$

$33\sqrt{2} +12$

6 0

2 years ago

Read 2 more answers

At an amusement park, a group of 154 people wants to ride the roller coaster. If each car on the roller coaster holds 9 people,

Vsevolod [243]

Answer:

Step-by-step explanation:

you simply divide 154 by 9, get around 17.1. 17 is the closest whole number answer, so 17*9 is 153.

do 154-153, you get 1.

not the best explaination but i hope it helps.

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3 years ago

Make a conjecture about the next item in the sequence 1, -4, 9, -16

Snezhnost [94]

To get -4 from 1, we must either subtract 5 from 1 or mult. 1 by -4. Unfortunately subtracting 5 from -4 does not result in 9, and mult -4 by -4 does not result in -16. So neither "works" in predicting the next term.

Can you think of any other experiments to do that would help you discover the pattern 1, -4, 9, -16?

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3 years ago

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Two submarines are underwater. The number -4,845 represents Submarine A's position (in feet) relative to the surface. The number

kolbaska11 [484]

Answer

Step-by-step explanation:

because submarine b has a bigger negative number so its more further down

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3 years ago