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natka813 [3]
3 years ago
13

Doug entered a canoe race. He rowed 31/2 miles in 1/2 hour. What is his average speed in miles per hour

Mathematics
1 answer:
Cloud [144]3 years ago
6 0
He rowed 31.5 miles in half of an hour, to get speed per hour, you  multiply by two.
31.5*2=63
Doug's average speed is 63 miles per hour~_~
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9. Why do some savanna plants flower for only part of the year?
Elena-2011 [213]

Answer:

D

Step-by-step explanation:

The Savannah has very limited resources because of its environment so plants need to conserve and save as much energy and water as they can

3 0
3 years ago
Select 2 points PLEASE ANSWER THANKS YOU SO MUCH
Xelga [282]

Answer:

1) The graph is as shown at the attached figure.

2) The line passes with (1,-3) and (2,-2)

Step-by-step explanation:

graph the line that passes with (3,-1) and has a y-intercept of -4

y-intercept is the value of y when x = 0

So, the line passes with (0 , -4)

The general form of the line  y = mx + c

Where m is the slope and c is y-intercept

given y-intercept = -4 ⇒ ∴ c = -4

using the other point to find m

So, when x = 3 , y = -1

So,  -1 = 3m - 4

Solve for m

3m = -1 + 4 = 3

m= 3/3 = 1

So, the equation of the line ⇒ <u>y = x - 4</u>

See the attached figure which represents the graph of the line

As shown at the graph the line passes through the points <u>(1,-3) and (2,-2)</u>

7 0
3 years ago
Evaluate each expression using the value w=4, a=2, and h=5<br> Equation is:<br> 6w+2a
Drupady [299]

Answer:

6w + 2a = 28

Step-by-step explanation:

the expression given, 6w + 2a, contains no variable h, so it's best to just ignore that h = 5.

first, plug in the values for w and a. you can do this in whatever order you want, but i'll start with w for this example.

plug in 4 for w.

6w + 2a

6(4) + 2a

now plug in 2 for a.

6(4) + 2a

6(4) + 2(2)

after plugging in the values, your expression is 6(4) + 2(2).

all that's left is to simplify. again, this can be done in whatever order you prefer, but i'm going to start with 6(4).

6(4) + 2(2)

24 + 2(2)

continue simplifying by multiplying 2(2).

24 + 2(2)

24 + 4

now add 24 + 4.

24 + 4 = 28

so, when w = 4 and a = 2, 6w + 2a = 28.

you can check the answer by plugging those values for a and w back into the completed equation.

6w + 2a = 28

6(4) + 2(2) = 28

24 + 4 = 28

28 = 28

since both sides of the equation are equal, that means that your answer of 28 is correct! :)

i hope this helps! have a great day <3

5 0
3 years ago
Which expression is equivalent to StartRoot 128 x Superscript 8 Baseline y cubed z Superscript 9 Baseline EndRoot? Assume y grea
Nataly [62]

Answer:

Option C.

Step-by-step explanation:

The given expression is  

\sqrt{128x^8y^3z^9}

It can be written as

\sqrt{(64\cdot 2)\cdot x^8\cdot y^{2+1}\cdot z^{8+1}}

=\sqrt{8^2\cdot 2\cdot (x^4)^2\cdot y^{2}\cdot y\cdot (z^{4})^2\cdot z}

=\sqrt{(8x^4yz^4)^2\cdot 2yz}

=8x^4yz^4\sqrt{2yz}

Therefore, the correct option is C.

6 0
3 years ago
A box contains 15 yellow, 5 orange, and 15 green tennis balls. If Izzy draws a tennis ball at random out of the box what is the
Eva8 [605]

Answer:

P(green or orange) = 4/7

Step-by-step explanation:

We need to know how many tennis balls there are

total = 15 yellow+ 5 orange+ 15 green

        = 35 balls

Probability of green or orange tennis ball is the sum of the green and orange tennis balls over the total balls

P(green or orange) = (green + orange)/total

                                = (15+5)/35

                                =20/35

                                =4/7


4 0
3 years ago
Read 2 more answers
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