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never [62]
3 years ago
13

Simplify by adding like terms -7x-9x+4-6y-3x+5-3y

Mathematics
1 answer:
Snezhnost [94]3 years ago
5 0
-1x+9-3y

hope this helps : )
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A cyclist travels 17 km from home to the park.
kupik [55]

Answer:

34 km/h

Step-by-step explanation:

speed = distance/time

Distance = 17km

Time = 0.5 or 1/2 hours because it's 30 minutes between 17:15 to 17:45, and 30 minutes is a half of an hour and you want km over hours

So

speed = 17/0.5

speed = 34 km/h

7 0
3 years ago
X2 + 4x - 21 = 0 quadratic formula
Elena-2011 [213]

Answer:

0

Step-by-step explanation:

x2 +4x-21=0. solve for x

x =  \frac{7}{2}

x = 3 \frac{1}{2}  \ x = 3.5

6 0
3 years ago
Jackie follow the steps to elevate the expression 15 - (37 + 8) divide 3 37 + 8 = 45 45-15= 30 30 divided by 3 = 10 Mark looks a
damaskus [11]

Answer:

So, we conclude that Mark is right.

Step-by-step explanation:

If we have the following expression: 15 - (37 + 8) : 3.

We will first divide the value we get in parentheses and then subtract it.

Because sharing is an older mathematical operation than subtraction. Therefore, we get:

15-(37+8):3=15-45:3=15-15=0

So, we conclude that Mark is right.

3 0
4 years ago
Can someone help on these two thanks
forsale [732]

Answer:

C & D

Step-by-step explanation:

For the first one, all you have to do is count how many numbers are behind the decimal point and add them together (1 + 3 = 4)  and then you count up the decimal 4 places which would be 0.7416.

For the second one, you divide the days by miles (18/3=6) then you divide the 6 by 72 which would be 12.

Hope this helps!

3 0
3 years ago
1) Your t-shirt provider sells you blank t-shirts for $5.00. What percent markup did you
Oksana_A [137]

Answer: 5%

Step-by-step explanation:

6 0
3 years ago
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