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Fudgin [204]
2 years ago
6

A truck drive drove 48 miles in 45 minutes. At this rate, how many miles can the truck driver drive in one hour?

Mathematics
2 answers:
-Dominant- [34]2 years ago
8 0

Answer:

the truck driver can drive 64 miles in one hour.

Step-by-step explanation:

Number of miles driven in 45 minutes = 48 miles

48/45x60=64

Annette [7]2 years ago
7 0

Answer:

45 minutes =3/4 hour

Step-by-step explanation:

The speed of the car is:

    v=S:t

      =48:3/4=64(miles/minute)

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A science teacher gives a test with 15 questions. This teacher is a hard grader. The teacher assigns points in the following man
ASHA 777 [7]

Answer:  The standard deviation was calculated incorrectly.

Step-by-step explanation:

  • The standard deviation measures the dispersion of the data values from the mean value.

It cannot be negative , because it is the square root of the variance .

We add all squared deviations from the data points away from the mean and (then divide it by the number of data values) to evaluate variance.

Since , any squared number cannot give a negative result.

⇒ Standard deviation cannot be negative.

⇒The standard deviation was calculated incorrectly.

Rest other things (given in options) can not be interpreted on the basis of given information.

6 0
3 years ago
- 7h + 2(-4h +5) > -4h +1 +10. Solve for h​
navik [9.2K]

Hello.

-7h + 2(-4h + 5) > -4h + 1 + 10 ; solve for h

Our first step is to get rid of all the parenthesis. We can do this by simplifying everything out.

-7h - 8h + 10 > -4h + 11

Add like terms.

-15h + 10 > -4h + 11

Now, we must isolate our variables. We do this by moving all variables to one side and moving our other numbers to the other.

Subtract 10 from both sides. Then, add 4h to both sides.

-15h + 4h > 11 - 10

Simplify.

-h > 1

Divide both sides by -1.

However, keep in mind that when dividing with a negative, you must change the sign. Therefore, > turns into <

-h ÷ -1 < 1 ÷ -1

h < -1

6 0
3 years ago
The sum of 28+29+42=99. So what addition property was used Commutative, associative, identity, or distributive ?
IrinaVladis [17]

28 + 29 + 42 = 28 + 42 + 29 = 99

Commutative property: a + b = b + a

3 0
3 years ago
Simplify 7x²-x²<br> how to simplify this maths question
kondaur [170]

Hi student, let me help you out! :)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . .

We are asked to simplify the expression \large\pmb{7x^2-x^2}.

\triangle~\fbox{\bf{KEY:}}

  • Combine like terms! :)

That's exactly what we need to do - combine like terms.

So, we subtract:

\star~\large\pmb{7x^2-x^2}

Which gives us:

\star~\large\pmb{6x^2}

Hope it helps you out! :D

Ask in comments if any queries arise.

#StudyWithBrainly

~Just a smiley person helping fellow students :)

6 0
2 years ago
Completely factor 1-100x^2​
stiv31 [10]

Answer:

Since both terms are perfect squares, factor using the difference of squares formula,  a 2 − b2 = ( a + b ) (a − b )  where  a= 1  and  b = 10 x . ( 1 + 10 x ( 1 − 10 x )

Step-by-step explanation:

4 0
3 years ago
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