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Kryger [21]
3 years ago
15

I need help plz !!!!!!!!! ​

Mathematics
1 answer:
katen-ka-za [31]3 years ago
4 0

Answer:

it x=-2(y-7)

            3

Step-by-step explanation:

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Nancy drove 400 miles in three days. She drove 113 on each of the first two days How many miles did she drive on the third day?
Gemiola [76]
113 what on each of the two day. Please clarify
4 0
3 years ago
Find, corrrect to the nearest degree, the three angles of the triangle with the given vertices. D(0,1,1), E(-2,4,3), C(1,2,-1)
Sholpan [36]

Answer:

The three angles of the triangle given above are 23, 73 and 84 correct to the nearest degree. The concept of dot product under vectors was applied in solving this problem. The three positions forming the triangle were taken as positions vectors. The Dot product also known as scalar product is a very good way of finding the angle between two vectors. ( in this case the sides of the triangle given above). Below is a picture of the step by step procedure of the solution.

Step-by-step explanation:

The first thing to do is to treat the given positions in space as position vectors which gives us room to perform vector manipulations on them. Next we calculate the magnitude of the position vector which is the square root of the sun of the square of the positions of the vectors along the three respective axes). Then we calculate the dot product. After this is calculated the angle can then be found easily using formula for the dot product.

Thank you for reading this and I hope it is helpful to you.

4 0
3 years ago
Janice receives $.40 per pound for 1 to 99 pounds of aluminum cans he recycles. he receives $.50 per pound if you are cycles mor
Ilya [14]

Answer:

M=\left\{\begin{matrix}0.4x &x\leq99 \\ 0.5x &x>100 \\ \end{matrix}\right.

Step-by-step explanation:

<u>Function modeling</u>

Real-life situations often require the help of mathematics to model numerically what happens when the variables involved can change. It could even be used to predict some expected outcomes from those models.

The problem states Janice receives $.40 per pound when he recycles less or equal than 99 pounds of aluminum. If x is the number of recycled pounds, then the amount of money he receives is

M=0.4x

We also know that if he recycles more than 100 pounds of aluminum, the pay increases to $0.5 per pound. In that case, the amount of money is

M=0.5x

This is a case where the function is defined differently depending on the conditions of the input variable x. It's called a piecewise function. The function can be written as

M=\left\{\begin{matrix}0.4x &x\leq99 \\ 0.5x &x>100 \\ \end{matrix}\right.

Note the function is not well constructed because there is a gap for x=100 where M is not defined. If we establish that for 100 pounds the payment is $0.5, then the second piece would include x=100

5 0
3 years ago
if it is friday then letica family will have pizza for dinner. if letica family has pizza for dinner, letica will song at the di
stiv31 [10]

Answer:

the first statement

Step-by-step explanation:

it's the first one because on the second one the family members name is letica and the family is letica so it cant be both

5 0
2 years ago
What is the length of line segment PQ?<br><br> 4 units<br> 5 units<br> 6 units<br> 9 units
makkiz [27]
Hello! 

I was looking for this answer as well, but I took the quiz and got it correct. The answer is 5 units. 

good luck! 
3 0
3 years ago
Read 2 more answers
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