3 years ago

Para hacer la suma: - 7/(12 )+(-11/18+7/18)= Debo: primero sumar los números que están en el paréntesis y la respuesta es

Mathematics

1 answer:

madam [21]3 years ago

8 0

Answer:

no Spanish!

Step-by-step explanation:

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Can someone please help me solve this…

aleksklad [387]

Answer:

C = 4s + 6a

C = 4(3) + 6(2)

C = 12 + 12

C = 24

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2 years ago

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Hank buys a used car for $7,200 and plans to sell it on his used car lot. What is the price of the car after a markup of 15%?

AysviL [449]

Answer:

8280

Step-by-step explanation:

You would multiply 7200 by .15 and then add it back to 7200.

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3 years ago

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Steve had 7 more than twice as many quarters as dimes. if the total value of her coins was $10.15, how many of each kind of coin

NemiM [27]

X=quarters, y=dimes
7+2x=y
0.25x+0.1y=10.15
we substitute the first equation into the second equation
0.25x+0.1(7+2x)=10.15
0.25x+0.7+0.2x=10.15
0.45x+0.7-0.7=10.15-0.7
0.45x=9.45
0.45x/0.45=9.45/0.45
x=21 quarters
7+2x=y, x=21
7+2(21)=y
7+42=y
y=49 dimes
check: 0.25x+0.1y=10.15 when x=21, y=49
21(0.25)=5.25 in quarters
49(0.1)=4.90 in dimes
5.25+4.90=10.15

3 0

3 years ago

Dana has 4 hours to spend training for an upcoming race. She completes her training by running full speed the distance of the ra

Sedaia [141]

Answer:

2hrs 40 minutes

Step-by-step explanation:

The formula for distance is expressed as:

$d=st, s=speed, t=time$

#The time taken to run:

$d=st\\\\t=d/s\\\\t_r=d/8$

#The time taken to walk:

$d=st\\\\t=d/s\\\\t_w=d/2$

#Since the distances are the same:

$d_r=8t_r,d_w=2t_w\\\\8t_r=2t_w\\\\t_r+t_w=4->t_w=4-t_r\\\\\therefore8t_r=2(4-t_r)\\\\8t_r=8-2t_r\\\\t_r=1\frac{1}{3} \hrs\\\\t_w=4-1\frac{1}{3}=2\frac{2}{3}\ hrs$

Hence, Dana spends 2hrs 40 minutes walking back

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3 years ago

Option A<br>Option B<br>Option C<br>Option D

12345 [234]

Answer:(B) ASA

Step-by-step explanation:

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2 years ago