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3 years ago

Tim drives at an average of 80km

Mathematics

1 answer:

guapka [62]3 years ago

7 0

Answer:

80km --- 49.7097mi

Step-by-step explanation:

thats quite slow... but please provide context then i can solve it for you

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A rectangular area adjacent to a river is fenced in; no fence is needed on the river side. The enclosed area is 1500 square fee

ZanzabumX [31]

Answer:

a) C(x) = 15000/x + 6x +80

b) Domain of C(x) { R x>0 }

Step-by-step explanation:

We have:

Enclosed area = 1500 ft² = x*y from which y = 1500 / x (a) where x is perpendicular to the river

Cost = cost of sides of fenced area perpendicular to the river + cost of side parallel to river + cost of 4 post then

Cost = 10*y + 2*3*x + 4*20 and accoding to (a) y = 1500/x

Then

C(x) = 10* ( 1500/x ) + 6*x + 80

C(x) = 15000/x + 6x +80

Domain of C(x) { R x>0 }

5 0

3 years ago

A grocery store recieves a 180-pound crate containing six 10-pound bags of potatos and an unknown number of 5-pound bags of pota

Diano4ka-milaya [45]

Answer:

$60+5x = 180$

Step-by-step explanation:

Let the number of bags of potatoes be x.

We have been given that a grocery store receives a 180-pound crate containing six 10-pound bags of potatoes and an unknown number of 5-pound bags of potatoes.

The weight of 6 potato bags of 10 pound each will be $6\times 10=60$ pounds.

We can write an equation for the number of bags of potatoes by equating the weight of six 10-pound bags of potatoes and x 5-pound bags of potatoes with 180 pounds.

$6*10+5x = 180$

$60+5x = 180$

Therefore, the equation that represents the number of bags of potatoes in the crate is $60+5x = 180$ .

5 0

3 years ago

Evaluate the imaginary number i^3

Pavlova-9 [17]

The answer to the problem i^3 is -i

6 0

3 years ago

Point A has coordinates (6,4) and point B has coordinates (2,7) write AB as column vector. Plz plz plz

Olenka [21]

Answer:

$\overrightarrow{AB }=\begin{bmatrix}-4\\3 \end{bmatrix}$

Step-by-step explanation:

<u>Column Vector</u>

Vectors are matrices having only one column or one row. A vector having only one column is called a column vector, and a vector having only one row is called a row vector.

It's required to find the vector AB as a column vector, and we are given the coordinates of A=(6,4) and B=(2,7).

The vector directed from A to B is found by subtracting its corresponding coordinates:

$\overrightarrow{AB }=$

Now we express the vector as a one-column matrix as follows:

$\overrightarrow{AB }=\begin{bmatrix}-4\\3 \end{bmatrix}$

7 0

3 years ago

Two interior angles of a triangle each measure 34 degrees what is the third interior angle

inessss [21]

Answer:

x =112

Step-by-step explanation:

The sum of the angles of a triangle add to 180

Two angles are 34 and 34. Let the third angle be x

34+34+x = 180

Combine like terms

68+x = 180

Subtract 68 from each side

68-68 +x = 180-68

x =112

8 0

3 years ago

Read 2 more answers