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kogti [31]
3 years ago
11

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2.4 h, and Car B traveled the dis

tance in 4 h. Car A traveled 22 mph faster than Car B. How fast did Car A travel? (The formula R⋅T=D , where R is the rate of speed, T is the time, and D is the distance can be used.) Enter your answer in the box.
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
4 0

We let x the distance traveled by Car A and y the distance traveled by car B. The speed of car A can be represented as x/2.4 and for Car B is y/4. From the statement given, we can write an equation relating the speed of both cars.


x/2.4 = 22 + y/4


Since y = x, then:



x/2.4 = 22 + x/4


Solving for x, we obtain:


x= 132 meters traveled by both cars


Therefore, Car A has a speed of 55 mph.



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on a piece of paper graph f(x) = 20*0.6^X.Then determine which answer choice matches the graph you drew.
ehidna [41]

Answer:

A

Step-by-step explanation:

1. For each a>0, a^0=1, thus 0.6 ^0=1 and

f(0)=20\cdot 0.6^0=20\cdot 1=20.

Hence, the graph of the function passes through the point (0,20). This gives us that option B and C are extra.

2. At x=1

f(1)=20\cdot 0.6^1=20\cdot 0.6=12.

The graph of the function passes through the point (1,12).

3. We have to choose option A or option D. In option D graph of the function passes through the point (1,16), in option A graph passes through the point (1,12), so option A is correct.

4 0
3 years ago
On average, a person’s heart beats about 4.2×107 times per year. There are about 7,600,000,000 people in the world. Use this dat
gayaneshka [121]

Answer:

a=3.192  b=17

Step-by-step explanation:

I just used a graphing calculator to multiply the req. numbers

5 0
2 years ago
Un entrepreneur en construction vient d'embaucher deux équipes d'ouvriers. Nommons-les l'équipe A et l'équipe B.
Irina18 [472]

Answer:

Le nombre de jours qu'il faudra à l'équipe A pour terminer le projet si elle travaillait seule est de 10 jours

Le nombre de jours qu'il faudra à l'équipe B pour terminer le projet si elle travaillait seule est de 15 jours

Step-by-step explanation:

Ici nous avons;

Temps pour l'équipe A et B pour terminer la tâche = 6 jours

L'équipe A + l'équipe B pour les deux premiers jours, il faudra 10 jours à l'équipe B pour terminer le travail

Que le projet soit P

Taux de travail de l'équipe A = W₁

Taux de travail de l'équipe B = W₂

∴ W₁ × 6 + W₂ × 6 = P ..................... (1)

W₁ × 2 + W₂ × 12 = P ....................... (2)

Par conséquent, W₁ = (P - 6 · W₂) / 6

En substituant la valeur de W₁ dans (2) nous avons

 Qui donne;

15 · W₂ = P

Par conséquent, il faudra 15 jours à l'équipe B pour terminer le projet si elle travaille seule et branche la valeur de l'équation (1), nous avons;

10 · W₁ = P

Par conséquent, il faudra 10 jours à l'équipe A pour terminer le projet si elle travaille seule.

6 0
4 years ago
7(b-3)(2b-7)=0 show your work
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Answer:

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Step-by-step explanation:

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4 0
3 years ago
78 correct answers out of 100 test questions and 39 correct answers out of 50 question are these equivalent
storchak [24]
78/100
= 39/50

39/50
= 39/50

yes these is equivalent
3 0
3 years ago
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