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Oduvanchick [21]
3 years ago
12

) If the pattern shown continues, how many black keys appear on a portable keyboard with 49 white keys? Suggestion: use equivale

nt ratios or a rate table to confirm your answer.

Mathematics
2 answers:
Lorico [155]3 years ago
7 0

In pattern there are 5 black keys and 7 white keys

Given- 49 white keys

49 = 7×7

number of black keys will be equal to = 7×5 = 35 black keys.

andriy [413]3 years ago
5 0

Answer:

35

Step-by-step explanation:

Here we see 5 black keys for every 7 white keys.

So the ratio is 5:7

If we need 49 white keys, find the amount we scale the original ratio by:

    49/7 = 7

So we are scaling by a factor of 7.

The number of black keys would be 5 * the scale of 7. = 35

So there should be 35 black keys.

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mariarad [96]

Answer:

The correct option is;

DE = 2·(BC), AD = 2·(AB), and AE = 2·(AC)

Step-by-step explanation:

Given that we have;

1) The side AD of the angle m∠ADE corresponds to the side AB of the angle m∠ABC

2) The side DE of the angle m∠ADE corresponds to the side BC of the angle m∠ABC

3) The side AE of the angle m∠ADE corresponds to the side AC of the angle m∠ABC

Then when we have DE = 2·(BC), AD = 2·(AB), and AE = 2·(AC), we have by sin rule;

AE/(sin(m∠ADE)) = 2·(AC)/(sin(m∠ABC)) = AE/(sin(m∠ABC))

∴ (sin(m∠ADE)) = (sin(m∠ABC))

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3 0
3 years ago
Jireh flew his crop duster from the ground to an altitude of 3,500 feet. He continued to fly at that height for 20 minutes until
exis [7]

Answer: Jireh flew his crop duster from the ground to an altitude of 3,500 feet.

Step-by-step explanation:

That is an example of an increasing interval.

7 0
3 years ago
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satela [25.4K]

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6 0
3 years ago
Use the information below to solve the problem Purchase price of article = $495 Down payment = $50 Number of payments = 36 True
Diano4ka-milaya [45]
Hi :)

Amount financed
495−50
=445
Total interest
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Total paid
445+123.49
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