4 years ago

I need help. Theses questions are hard

Mathematics

1 answer:

pochemuha4 years ago

8 0

Here's 9 - 13. If you need any further help, I'd gladly assist.

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In the figure, and bisect each other. The length of is 12 centimeters and the length of is 11 centimeters. The length of is cent

Andreyy89

Answer:

11 and 12

Step-by-step explanation:

AD is opposite BC so they're equal, and DC is opposite AB so they're the same.

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3 years ago

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Solve for m: E=mc²<br> please help

aleksandr82 [10.1K]

Step-by-step explanation:

we have,

E = mc2

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3 years ago

Annie estimates that the height of a bookcase is 78.25 in. The actual height is 75.50 in.

tankabanditka [31]

Answer:

The percentage error is 3.6 % .

Step-by-step explanation:

Formula

$Error\ percentage = \frac{Error\times 100}{Exact\ value}$

$Error = \left |Approx - Exact \right |$

As given

Annie estimates that the height of a bookcase is 78.25 in. The actual height is 75.50 in.

Here

Approx value = 78.25 in

Exact value = 75.50 in

$Error = \left |78.25 - 75.50\right |$

Error = 2.75

Put in the formula

$Error\ percentage = \frac{2.75\times 100}{75.50}$

$Error\ percentage = \frac{275}{75.50}$

Error percentage = 3.6 %

Therefore the percentage error is 3.6 % .

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3 years ago

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The ratio of keepers to animals in the city zoo is 2 : 7. The table shows the current numbers of animals and keepers in the zoo.

agasfer [191]

2:7 ( $\frac{12}{42} = \frac{2}{7}$ )
12:42

42 + 21 = 63 animals
63/7 = 9
9 x 2 = 18

The answer is 18 keepers

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kirza4 [7]

Answer:

80 units

Step-by-step explanation:

When a figure is dilated by 2, its side measurements are halved. The figure you're seeing shows the quadrilateral <em>after </em>dilation (we can tell by the apostrophes); if U'R' is 40, UR will have to be 80.

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