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Advocard [28]
3 years ago
15

8. Jack has twice as many dimes as quarters. If the total

Mathematics
1 answer:
kati45 [8]3 years ago
8 0

Answer:

Step-by-step explanation:

d=2q, q=d/2

10d+25q=630, using q=d/2

10d+25d/2=630

20d+25d=1260

45d=1260

d=28

So he has 28 dimes.

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What is the equation of a line that passes through the points (3, 6) and (8, 4) in slope intercept form?
MrMuchimi

Answer:

y=-\frac{2}{5}x +8.4

Step-by-step explanation:

Gradient

m =\frac{y-y1}{x-x1}

m = \frac{6-4}{3-8}

m=-\frac{2}{5}

Equation of a line

(y-y1)=m(x-x1)\\

- Sub one set of points into equation

(y-6)= -\frac{2}{5} (x-6)

y=-\frac{2}{5}x +8.4  

6 0
3 years ago
Divide. Reduce the answer to lowest terms. 3/4 ÷ 1/3
Slav-nsk [51]

Answer:

9/4

Step-by-step explanation:

When you divide by a number, whole number or fraction, it's exactly like multiplying by its inverse.

Like if you divide 4 by 2,  you can easily express that has 4 * 1/2.

In the same manner, when you divide 3/4 by 1/3, you can say that you're multiplying 3/4 by 3/1

The result of 3/4 * 3/1 = 9 / 4

Which you cannot simplify because 9 and 4 don't have any common factors (other than 1).  The only other way to express it would be 3²/2² or (3/2)²

6 0
3 years ago
4) An arithmetic sequence has a 7th term of 54 and a 13th term of 94. Find the common difference
san4es73 [151]

Answer:

20/3

Step-by-step explanation:

Every nth term takes the form of  a + n*d, where a is the first  term.

So 7th term = (54 = a + 7d), 13th term = (94 = a + 13d).

equate them both:

94 - 13d = 54 - 7d

40 = 6d

d = 40/6

6 0
2 years ago
Please I need an example of this to help me out…<br> (3.76 x 10^5)+(7.44 x 10^5)
Alika [10]

Answer:

1.12 x 10^6 or 1,120,000

Step-by-step explanation:

You work out the first part which would be (3.76 x 10^5) or 376,000.

Then you work out the second part which would be (7.44 x 10^5) or 744,000.

Then you add them together and move the decimal over to where the number is less than ten but greater than 0 so it would be like this:

1.120000

But just cut all the zeros so it would be like this:

1.12

And how ever many times you move the decimal over is the number you put beside the ten by the way. it should look a little like this by the time you are done:

1.12 x 10^6

3 0
3 years ago
What is the slope of the line x= -5
olganol [36]

Answer:

the slope is the five

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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