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Nimfa-mama [501]
2 years ago
7

1. Drew ran the first 2 3/4 miles of a 5-mile race in 1/2 hour. What was his average rate, in miles per hour, for this first par

t of the race? Describe how you solved the problem.
Mathematics
1 answer:
sveticcg [70]2 years ago
3 0

Answer:

5 1/2

Step-by-step explanation:

Rate x Time = Distance.  If you know 2 of the parts, you can figure out the 3rd part.  You know the time and the distance, so plug those in and solve.

Let R = rate

R(1/2) = 2 3/4  Let's change  2 3/4 into a improper fraction.  

R(1/2) = 11/4 Multiply 4x2 and then add 3 that gets you 11 and the bottom number stays the same.  Next, multiply both sides of the equation by 2.

R = 22/4 or 11/2 or 5 1/2 miles per hour.

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Answer to the equation -6+2c=3c-(6+5)
Phantasy [73]

Answer:

c = 5

Step-by-step explanation:

- 6 + 2c = 3c -(6+5)

-6 + 2c = 3c -11

-6 + 11 = 3c- 2c

5 = c

3 0
3 years ago
Please help!! I don’t get it
Marrrta [24]

Answer:

Each hotdog costs $1.65

Each juice drink costs $1.05

Step-by-step explanation:

Let's begin by letting x represent the number of hot dogs and y the number of juice drinks.

The Baxter family bought 6 hot dogs and 4 juices for $14.10.

6x + 4y = 14.10

The Farley family bought 3 hot dogs and 4 juices for $9.15.

3x + 4y = 9.15

Now, we subtract these equations.

6x + 4y = 14.10\\- (3x + 4y = 9.15)

Since y has reversed coefficients, it gets eliminated. Now solve for x.

6x+4y-3x-4y=14.1-9.15\\3x = 4.95\\\frac{3x}{3} = \frac{4.95}{3}

\frac{4.95}{3} = 1.65

x = 1.65

NOW, we find y by substituting x with 1.65 (in either equation).

We'll use the first equation.

6x + 4y = 14.10

6(1.65) + 4y = 14.10

9.9 + 4y = 14.10\\4y = 14.1 - 9.9\\4y = 4.2

\frac{4y}{4} = \frac{4.2}{4} \\y = 1.05

x = 1.65

y = 1.05

x represents hotdogs and y represents juice drinks.

Therefore, each hotdog costs $1.65 and each juice drink costs $1.05.

<em> I hope this helps! :)</em>

6 0
3 years ago
4) Solve for x.<br> y = 9x – XZ
kogti [31]

Answer:

the answer is x=y/9 + XZ/9

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

4 0
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PLEASE HELP ME!!! ILL GIVE BRAINLIESTS IF RIGHT!
AVprozaik [17]

Answer:

B

Step-by-step explanation:

When you look at the model, you see that the bottom of the shape is square. So looking at the flat model, which one is thhe one with a square as a base. B does.

5 0
3 years ago
Consider the line y = -7x+9.
STALIN [3.7K]

Answer:

The answer is a(7x+9)

Step-by-step explanation:

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