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2 years ago

Plss help get brainiest if right!!

Mathematics

1 answer:

Fantom [35]2 years ago

8 0

Answer:

18 quarters
7 dimes

Step-by-step explanation:

The given relations can be used to write two equations describing the coins. One equation can express the total number of coins; the other, their total value.

<h3>setup</h3>

Let d and q represent the numbers of dimes and quarters, respectively. The the total number of coins is ...

d + q = 25

and their total value is ...

0.10d +0.25q = 5.20

<h3>solution</h3>

Using the first equation to write an expression for d, we can substitute that into the second equation.

d = 25 -q

0.10(25 -q) +0.25q = 5.20

0.15q = 2.70 . . . . . . . . . collect terms, subtract 2.50

q = 18 . . . . . . . . . . . divide by 0.15

d = 25 -q = 7

You have 18 quarters and 7 dimes.

_____

<em>Additional comment</em>

It is generally convenient to solve for the number of the higher-value coin. That way, the numbers in the equations stay positive, tending to reduce errors.

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Help Please! Thanks so much if u do

Sati [7]

Answer:

$65

Step-by-step explanation:

Let's add up the flat rate and the cost of four tires:

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We are to solve for "flat rate." First, multiply out 4($122.57/tire), obtaining a tire cost of $490.28 total. Subtracting this tire cost from the $555.28 Janette paid the shop, we get "flat rate" = $555.28 - $490.28, or $65.

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3 years ago

Why are halves a good choice for benchmark fractions for 1 1/3

Natalka [10]

Answer and explanation:

Benchmark fractions are fractions that are used as references in measuring other fractions. They are easily estimated and so can be used in measuring more "specific" fractions such as 1/5, 7/9, 3/7, 1/3 etc. If I wanted to measure 1 1/3cm for instance using a calibrated ruler, having centimeter measurements, I would first find 1cm on the ruler and then find half of one centimeter. Seeing that half is bigger than 1/3 but close, I could then estimate 1/3 to be somewhere less than 1/2 but a bit close to it

3 0

3 years ago

Select the correct answer.

adoni [48]

The correct answer is b) 2

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4 years ago

Any help would be great

nadya68 [22]

Answer:

Step-by-step explanation:

38=10+13+c

c=38-10-13=15

Hope this helps!

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3 years ago

Quadrilateral STWR is inscribed inside a circle as shown below. Write a proof showing that angles T and R are supplementary.

AlladinOne [14]

Observe the given figure.

Here, angle T and R are the inscribed angles.

And sum of inscribed angles is half of measure of intercepted arcs.

Since, the measure of intercepted arcs is 360 degrees.

Therefore, $\angle T + \angle R = \frac{1}{2} \times 360 ^{\circ}$

$\angle T + \angle R = 180 ^{\circ}$

Hence, the sum of the two angles is 180 degrees.

Therefore, these are the supplementary angles.

Therefore, angle T and angle R are supplementary angles.

Hence, proved.

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3 years ago