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Nady [450]
2 years ago
11

Martin has a combination of 33 quarters and dimes worth a total of $6. Which system of linear equations can be used to find the

number of quarters, q, and the number of dimes, d, Martin has?
q + d = 6 25q + 10d = 33
q + d = 6 0.25q + 0.1d = 33
q + d = 33 25q + 10d = 6
q + d = 33 0.25q + 0.1d = 6
Mathematics
2 answers:
Arte-miy333 [17]2 years ago
5 0
C because I know that’s the answer
mr_godi [17]2 years ago
3 0

Answer:

q + d = 33  0.25q + 0.1d = 6 Option D

Step-by-step explanation:

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Solve the compound inequality 5 5 x + 2 < 11. ​
kvv77 [185]

Answer:

x < 9/55

Step-by-step explanation:

55x+2 is less than 11

we subtract 2 from both sides, then we divide both sides by 55.

x is less than 9/55

8 0
2 years ago
What is the 9th term of 45,40,35,30,25
Vesnalui [34]

Answer:

5

Step-by-step explanation:

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7 0
3 years ago
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Shaunda answered 86% of the questions on her test correctly. If there were 50 questions on the test, how many did she NOT answer
Arada [10]

Answer: 7 Answers Incorrect

Step-by-step explanation:

86% may be written as (86/100) or as 0.86.

Since "it's a ratio (sic.) problem," then:

                 86/100 = correct/50

                correct = (86/100)*50       (multiply both sides by 50)

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8 0
3 years ago
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Math question #1 please show steps
-Dominant- [34]

Answer:

C

Step-by-step explanation:

An approximation of an integral is given by:

\displaystyle \int_a^bf(x)\, dx\approx \sum_{k=1}^nf(x_k)\Delta x\text{ where } \Delta x=\frac{b-a}{n}

First, find Δx. Our a = 2 and b = 8:

\displaystyle \Delta x=\frac{8-2}{n}=\frac{6}{n}

The left endpoint is modeled with:

x_k=a+\Delta x(k-1)

And the right endpoint is modeled with:

x_k=a+\Delta xk

Since we are using a Left Riemann Sum, we will use the first equation.

Our function is:

f(x)=\cos(x^2)

Therefore:

f(x_k)=\cos((a+\Delta x(k-1))^2)

By substitution:

\displaystyle f(x_k)=\cos((2+\frac{6}{n}(k-1))^2)

Putting it all together:

\displaystyle \int_2^8\cos(x^2)\, dx\approx \sum_{k=1}^{n}\Big(\cos((2+\frac{6}{n}(k-1))^2)\Big)\frac{6}{n}

Thus, our answer is C.

*Note: Not sure why they placed the exponent outside the cosine. Perhaps it was a typo. But C will most likely be the correct answer regardless.

5 0
3 years ago
Perform the indicated computation. Write the answer in scientific notation. 12x10^4\3x10^−2
Paul [167]

Let us consider the given expression:

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= \frac{12 \times 10^{6}}{3}

On dividing, we get

= 4 \times 10^{6}

Hence, it is the required scientific notation of the given expression.

6 0
3 years ago
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