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3 years ago

4. Becca was on the 12 floor of

Mathematics

1 answer:

Nataliya [291]3 years ago

6 0

Answer:

she is on the 4th floor

Step-by-step explanation:

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The ratio of boys to girls in a class is 4:5 what fraction of teh class are boys

GalinKa [24]

Answer:

4/9

Step-by-step explanation:

If you add the ratios, it gives you the total, so 4 + 5 = 9. 9 total students. Since boys is represented by 4, then 4/9 is the fraction for boys and 5/9 is the fraction for girls.

5 0

4 years ago

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Please help help help help !!!!! ASAP<br><br>Factorise <br><br>3у^2 - 54y + 243

fiasKO [112]

Answer:

3(y-9)^2

Step-by-step explanation:

8 0

3 years ago

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A factory makes 300 sheets of construction paper per hour. How many sheets of construction paper will the factory make in 9 hour

Semmy [17]

Answer:

2700

Step-by-step explanation:

One hour is 300 sheets. We need to find 9 hours,

so 300*9= 2700

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3 years ago

Which one doesn’t belong??

Iteru [2.4K]

Answer:

40% OR -1/4

Step-by-step explanation:

It could be 40% as all the other numbers are in fraction form while this one is written as a percent.

It could also be -1/4 because that is the only negative number.

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3 years ago

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Find the length of midsegment YZ in trapezoid ABCD when A(-5,-6) B(-6,-2) C(-4,0) and D(3,2)

Luda [366]

Answer:

Option C

Step-by-step explanation:

Since, Y and Z are the midpoints of sides AB and CD of the given trapezoid.

Segment YZ will the midsegment of trapezoid ABCD.

By the theorem of midsegment,

m(YZ) = $\frac{1}{2}(AD+BC)$

By using expression for the length of a segment between two points,

Length of a segment = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Distance between two points A(-5, -6) and D(3, 2),

AD = $\sqrt{(3+5)^2+(2+6)^2}$

AD = $\sqrt{64+64}$

AD = $\sqrt{128}$

AD = $8\sqrt{2}$

Distance between B(-6, -2) and C(-4, 0)

BC = $\sqrt{(-6+4)^2+(-2-0)^2}$

BC = $\sqrt{8}$

BC = $2\sqrt{2}$

Therefore, m(YZ) = $\frac{1}{2}(8\sqrt{2}+2\sqrt{2})$

= $\frac{1}{2} (10\sqrt{2})$

= $5\sqrt{2}$

Option C will be the answer.

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3 years ago