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3 years ago

HELP this is an end of year exam and i got a 64 the first time

Mathematics

2 answers:

aksik [14]3 years ago

5 0

Answer:

81 feet

Step-by-step explanation:

i got it right on edge

Zinaida [17]3 years ago

3 0

Answer:

(D) 81 feet

Step-by-step explanation:

From the figure drawn, it is given that AB is parallel to DE, in ΔABC and ΔCDE, we have

∠BAC=∠DEC(Alternate angles)

∠ACB=∠DCE(Vertically opposite angles)

Thus, by AA rule, ΔABC is similar to ΔCDE.

Since the line connecting from the whales to the sharks is parallel to the line connecting from the penguins to the fish tanks, the triangles shown in the figure are similar. Using the property of similar triangles.

Hope this helped!!!

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Shen received a $45.00 gift card for a photo center. He used it to buy prints that cost 25 cents each. The remaining balance, B

vovangra [49]

Answer:

$41.25

Step-by-step explanation:

with the given equation, we can use the numbers given and plug it in.

x = the 15 prints

45.00 - 0.25(15) =

45.00 - 3.75 = 41.75

hope this helps!!:)

3 0

3 years ago

Two student are reading a book. Keith reads 6 pages a day.tameka read 5 pages a day but he start sooner and has already read 15

NemiM [27]

Answer: Whoever read the 15 pages before read the most.

Step-by-step explanation:

6 0

4 years ago

The expression cosine of pi over 2 times cosine of pi over 5 plus sine of pi over 2 times sine of pi over 5 can be rewritten as

Kisachek [45]

Answer:

(b) cos(3π/10)

Step-by-step explanation:

The given expression matches the trig identity form for the cosine of the difference of two angles:

cos(α-β) = cos(α)cos(β) +sin(α)sin(β)

To match the given expression exactly, we can choose ...

α = π/2

β = π/5

Then the difference is ...

α -β = π/2 -π/5 = (5/10)π -(2/10)π = 3π/10

The given expression can be shortened to ...

cos(3π/10)

<em>Additional comment</em>

Sometimes it can be difficult to remember when the signs in trig identities match, and when they differ. The fact that cosines of smaller angles have larger values can be a peg on which to hang that hat.

8 0

2 years ago

Item 4 Find the perimeter of the window. Round your answer to the nearest tenth. 90 cm

jeyben [28]

Answer:

Step-by-step explanation:

item 4 Find the perimeter of the window. Round your answer to the nearest tenth. 90 cm

You did not state the diameter or radius of the window

so, i will use 90cm as the diameter of the window

First, I'd calculate the half circumference of the window.

The formula for circumference is $c = 2\pi r$ ,