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Inessa05 [86]
4 years ago
5

A construction crew needs to build a road that will be 20 miles long. The crew already completed a stretch that is 6.44 miles lo

ng and another that is 8.62 miles long. How much more road does the construction crew need to build? 2.18 miles 4.94 miles 11.38 miles 13.56 miles
Mathematics
2 answers:
Mademuasel [1]4 years ago
8 0

Answer:

Your answer would be (B) 4.94. Hope this helped!

6.44 + 8.62 = 15.06

20 - 15.06 = 4.94

Step-by-step explanation:

Hope this helps : )

Elden [556K]4 years ago
7 0

Answer:

4.94 miles

Step-by-step explanation:

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What are the zeros of f(x) = x2 - 12x + 36?
topjm [15]

Answer:

c. x = 6 only

Step-by-step explanation:

In order to calculate the zeros of f(x), we need to set it equal to zero and find the corresponding values of x.

x^{2}-12x+36=0

Using the midterm breaking, we can split -12x into two such terms whose sum will be -12x and product will be 36x². These two terms are -6x and -6x

So, the above expression can be written as:

x^2-6x-6x+36=0\\\\ x(x-6)-6(x-6)=0\\\\ (x-6)(x-6)=0\\\\ (x-6)^{2}=0\\\\ x-6=0\\\\ x=6

This means, the zero of f(x) occurs at x = 6 only.

8 0
3 years ago
A box has a width of 10 cm and a length of 17 cm. The volume of the box is decreasing at a rate of 527 cubic cm per minute, with
Ber [7]

Answer:

-3.1 cm per minute.

Step-by-step explanation:

We have been given that a box has a width of 10 cm and a length of 17 cm. The volume of the box is decreasing at a rate of 527 cubic cm per minute, with the width and length being held constant.

We know that volume of a cuboid is length times width times height.

V=lwh

Upon substituting our given width and length, we will get:

V=17\cdot 10\cdot h

V=170\cdot h

Now, we will find derivative of volume with respect to time as:

\frac{dV}{dt}=170\cdot \frac{dh}{dt}

Since the volume of the box is decreasing at a rate of 527 cubic cm per minute, so we will substitute \frac{dV}{dt}=-527  as:

-527=170\cdot \frac{dh}{dt}

\frac{-527}{170}=\frac{170\cdot \frac{dh}{dt}}{170}

\frac{dh}{dt}=-3.1

Therefore, the rate of change in height is -3.1 cm per minute.

6 0
4 years ago
The sum of 86, 68, and 38 is 192. What do you also know about the sum of 68, 38, and 86? Explain
trasher [3.6K]
It's the same because it's used the commutative property where:

a+b = b+a

So, 86+68+38=192 it's the same sum as 68+38+86=192
4 0
3 years ago
Read 2 more answers
A scale drawing has a scale of 1/4 centimeters equal to 10 meters. What is the unit rate of centimeters to meters
lozanna [386]

Answer:

  • 1 cm to 40 m
  • 1/40 cm to 1 m

Step-by-step explanation:

The problem statement isn't clear as to which unit is 1 in your unit rate. If it is 1 cm, you can find the unit rate by multiplying the reationship by 4:

... 4 × (1/4 cm to 10 m) = 1 cm to 40 m

If it is 1 m, you can find the unit rate by multiplying the relationship by 1/10:

... 1/10 × (1/4 cm to 10 m) = 1/40 cm to 1 m

_____

<em>Additional comment on the problem</em>

Ordinarily, drawing scales are expressed as a fraction. Here, that would be ...

(1/4×1/100 m)/(10 m) = 1/4000 . . . or . . . 1 : 4000

3 0
3 years ago
Help please me with this ....
Nonamiya [84]
Ext. 13/44 hope it helpa
5 0
3 years ago
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