3 years ago

Simplify 4(x + 5) - 10x + 4/5

Mathematics

1 answer:

Bumek [7]3 years ago

4 0

Answer:

-6x+104/5

Step-by-step explanation:

Distribute: (4)(x)+(4)(5)+-10x+4/5 = 4x+20+ -10x + 4/5 combine like terms: (4x+-10x) + (20+4/5) simplify: -6x 104/5 answer: -6x+104/5

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3 years ago

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Does anybody know how to do question 2 please show working out

Natalija [7]

2a.
Since BC = 10m and M is the midpoint, we can find CM by : 10÷2 = 5m
So, CM = 5m

2b. Now, you have the base ( 5m) & hypotenuse (13m). Pythagoras' Theorem:

$c {}^{2} = {a}^{2} + {b}^{2}$
Where c is the hypotenuse, a & b are sides.

${13}^{2} = {5}^{2} + b {}^{2} \\ {5}^{2} + {b}^{2} = 13 {}^{2} \\ {b}^{2} = 13 {}^{2} - {5}^{2} \\ b = \sqrt{144} \\ b = 12$
b here refers to the height.

2c.
Area of a right-angled triangle =
$\frac{base \times height}{2}$
So,
$\frac{10 \times 12}{2} \\ = 60 {m}^{2}$

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3 years ago

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Is 2/3 greater than 7/8

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No 7/8 is greater because the percentage is higher 85.5% is = to 7/8 and 2/3 is equal to 80%

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4 years ago

8 times 8 times 7<br> please help

Kobotan [32]

Answer:

8x8x7=448 it that how you do it?