3 years ago

Someone please help me ASAP

Mathematics

1 answer:

valentina_108 [34]3 years ago

6 0

Answer:

36.3 percent

Step-by-step explanation:

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Sarah bought pencils and markers for school. She bought 3 times as many pencils as markers.

Serhud [2]

Answer:

Sarah bought 30 pencils

Step-by-step explanation:

1. Let define p, as the number of pencils bought, and m, as the number of markers bought.

$0.15p+0.30m=7.50$

$p=3m$

3. Substitute p in the first equation to 3m since p=3m as defined.

$0.15(3m) + 0.30m=7.50\\0.45m+0.30m=7.50\\0.75m=7.50\\m=10$

plug m into equation p=3m to find the number of pencils bought

$p=3m=3(10)=30$

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3 years ago

How is this number read? 18.73

Nana76 [90]

Answer:

18 and 73 hundredths

the number is 18 plus .73 .73 is 73 hundredths

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4 years ago

What is the approximate distance between the points (-3, -4) and (-8, 1) on a coordinate grid? A. 11.40 units B. 7.07 units C. 3

Blizzard [7]

The formula of the distance between two points:

$A(x_A;\ y_A);\ B(x_B;\ y_B)\\\\|AB|=\sqrt{(x_B-x_A)^2+(y_B-y_A)^2}$

We have:

$A(-3;-4);\ B(-8;\ 1)$

substitute:

$|AB|=\sqrt{(-8-(-3))^2+(1-(-4))^2}=\sqrt{(-8+3)^2+(1+4)^2}\\\\=\sqrt{(-5)^2+5^2}=\sqrt{25+25}=\sqrt{25\cdot2}=\sqrt{25}\cdot\sqrt2\\\\=\boxed{5\sqrt2\approx7.07}$

Answer: B. 7.07

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3 years ago

Which of the following methods of timekeeping is the least precise?

katen-ka-za [31]

I think C would be your answer

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3 years ago

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Andy cycles a distance of 30 km at an average speed of 24 km/h. He then runs a distance of 12 km at an average speed of 8 km/h.

mote1985 [20]

Answer:

1 Hour and 20 minutes