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Mashcka [7]
3 years ago
11

The quotient of 52 and the sum of - 4 and -9

Mathematics
1 answer:
vampirchik [111]3 years ago
7 0

Answer:

89

Step-by-step explanation:

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50 POINTS! :D
Alexxandr [17]

Answer:

The speed of the first car is 60 mph

Step-by-step explanation:

speed = distance/time

Solve the above equation for distance to get

distance = speed * time

or simply

d = st

Now we use this formula for distance to write an equation for each car.

Let s = speed of second car

Then since the speed of the first car is 10 mph faster, the first car's speed is s + 10.

The time the two cars traveled is equal but unknown, so let the time = t.

First car: speed = s + 10; time = t; distance = 120 miles

d = st

120 = (s + 10)t    

(s + 10)t = 120      Equation 1

Second car: speed = s; time = t; 100 miles

d = st

100 = st

st = 100       Equation 2

Equations 1 and 2 form a system of 2 equations in 2 unknowns.

(s + 10)t = 120

st = 100

Distribute t in the first equation.

st + 10t = 120

From the second equation we know st = 100, so substitute 100 for st.

100 + 10t = 120

10t = 120

t = 2

The time traveled was 2 hours.

Equation 2:

st = 100

Substitute t with 2.

s * 2 = 100

s = 50

The speed of the second car was 50 mph.

The speed of the first car is s + 10.

s + 10 = 50 + 10 = 60

Answer: The speed of the first car is 60 mph

8 0
3 years ago
Please help I'm stuck on this question! worth 15+ points!!
zvonat [6]

Answer:

152

Step-by-step explanation:

360-(118+54)

3 0
2 years ago
Read 2 more answers
Richard has a rectangular plot of land that is 525 feet long and y feet wide. He decides to build a fence around the plot. If th
mart [117]

Answer:

Step-by-step explanation:

P= 2(L) + 2(w)

1504= 2(525) + 2(w)

1540= 1050 + 2(w)

1540 - 1050= 2(w)

490 = 2(w)

490/2 = w

245 = w

w is y

L is 525

5 0
3 years ago
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It is given that trapezoid EFGH is an isosceles trapezoid. We know that FE ≅ GH by the definition of
jeyben [28]

Answer:

1. isosceles trapezoid

2.  FEH

3.  GHE

4. Reflexive

5. SAS

Step-by-step explanation:

Edg2020!!

3 0
3 years ago
Which algebraic expression is equivalent to the expression below?
inessss [21]
Using the formula a(b+c) = ab + ac, then 7(2x-6) = 14x - 42. The answer is D.
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