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3 years ago

7

Ibrahim has some building blocks that are all cubes of the same size. He uses three of the blocks to make a pile with a height o

f 43.5 cm. Then he makes a row with five of the blocks with no gaps. Work out the length of the row of five blocks

1 answer:

MArishka [77]3 years ago

4 0

Answer:

72.5

Step-by-step explanation:

one block = 43.5 / 3 = 14.5

five blocks = 5 * 14.5 = 72.5 (ans)

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Bingel [31]

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Which of the following expressions is equivalent to 3p^4

olganol [36]

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3 years ago

Question 15 of 43

Andrews [41]

Answer:

Option A

Step-by-step explanation:

$\frac{12}{25} \times \frac{11}{24} \times \frac{10}{23} \times \frac{9}{22}$

we start with 12 red marbles out of 25 marbles, that's the probability for the first.

in the second step we have one red marble less, wich also means one marble less overall

and so on

$\frac{12 \times 11 \times 10 \times 9}{25 \times 24 \times 23 \times 22}$

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can be reduced by 1320 (step by step) to

$\frac{9}{230}$

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3 years ago

I got the first part but cant figure out the second, help would be appreciated

azamat

Answer:

see explanation

Step-by-step explanation:

look at the explanation& answer photo

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3 years ago

What number must you add to complete the square <br> x^2-20x=17

crimeas [40]

$(*)\ (a-b)^2=a^2-2ab+b^2$

$x^2-20x=17\\\\x^2-2\cdot x\cdot10=17\ \ \ |+10^2\\\\\underbrace{x^2-2\cdot x\cdot10+10^2}_{(*)}=17+10^2\\\\(x-10)^2=117$

Answer: 10² = 100

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