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3 years ago

7

On a cross country trip the Anderson family plan to average 500 miles in 10 hours of driving each day on average how many miles

per hour do the Andersons plan to drive

1 answer:

PolarNik [594]3 years ago

7 0

Answer:

50 miles per hour

Step-by-step explanation:

500 miles in 10 hours

= 500/10

= 50 miles per hour

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a city is building bike racks for people who ride their bikes to work and around town. the city will have 47 bike racks with roo

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The city's racks can hold 752 bikes.

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3 years ago

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Please help: linear algebra problem. (Linear combinations)

DochEvi [55]

Answer:

$\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right] \left[\begin{array}{ccc}c\\d\end{array}\right] =\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

This tells us that:

$A=\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right]$

$b=\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

Step-by-step explanation:

So we are saying we have scalars, c and d, such that:

$c\left[\begin{array}{ccc}5\\5\\ 3\end{array}\right]+d\left[\begin{array}{ccc}7\\-8\\-9\end{array}\right]=\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$ .

So we want to find a way to express this as:

Ax=b where x is the scalar vector, $\left[\begin{array}{ccc}c\\d\end{array}\right]$ .

So we can write this as:

$\left[\begin{array}{ccc}5&7\\5&-8\\3&-9\end{array}\right] \left[\begin{array}{ccc}c\\d\end{array}\right] =\left[\begin{array}{ccc}-16\\3\\-15\end{array}\right]$

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3 years ago

Porfa ayudenme con este ejercicio.

Daniel [21]

D) La camisa roja y el pantalon negro

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3 years ago

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Water has a specific heat of 4.184 J/g°C and requires 23,000 J of heat to raise the

nasty-shy [4]

Answer:

$m=80.840 kg$

Step-by-step explanation:

Given Data,

Q=23000 J

c=4.184 J/g °c

Δt= 68 °c

m=?

By using this equation,

Q=mcΔt

$23000=m\times 4.184\times 68\\\\m=\frac{23000}{4.184\times68} \\\\\\m=80.840 kg$

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2 years ago

Multiple choice!! There's only one correct answer.

GalinKa [24]

The solution is where the red line crosses the blue line, which on the X axis is between the 1 and the 2, so about 1.5.

Convert the fractions to decimal and see which one is close to 1.5:

13/8 = 1.625

25/16 = 1.5625

7/4 = 1.75

27/16 = 1.6875

The closest one to 1.5 is 25/16

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3 years ago