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Sergeu [11.5K]
3 years ago
10

HELP PLEASEEEEEEEEEE!

Mathematics
1 answer:
Setler [38]3 years ago
6 0
15%/100 = 3.51/23.40, 3.51 is your answer because multiple 100*.234 you get 23.40 and then multiply 15*.234 and get 3.51
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What does the number 3.1968e+22 mean?
sattari [20]
You add them and then it would be 30.6898033492
8 0
3 years ago
The cost of a baguette and a cup is 1.45 the cost of 2 baguettes and a cup is 2.10 what is the cost of the cup
olga2289 [7]

Answer:

0.80

Step-by-step explanation:

2.10-1.45=0.65

0.65=1 baugette

1.45-0.65=0.8

0.8=1 cup

5 0
3 years ago
The vertices of a square CDEF are C(1,1), D(3,1), E(3,-1) and F(1,-1). What formulas prove that the diagonals are congruent perp
Oxana [17]

To prove that the diagonals are congruent, you need to formula to compute the distance between two points:

d(A,B) = \sqrt{(A_x-B_x)^2 + (A_y-B_y)^2}

Using that formula, you may prove that d(C,E) = d(D,F), which means that the two diagonals have the same length.

To prove that they are perpendicular, you need the formula to compute the slope of a segment. The slope, knowing the enpoints, is given by

m = \cfrac{\Delta y}{\Delta x} = \cfrac{A_y-B_y}{A_x-B_x}

You can use this formula to prove that

m_{CE} = -\cfrac{1}{m_{DF}}

In fact, if one slope is the opposite of the reciprocal of the other, the two segments are perpendicular.

Finally, to prove that they bisect each other, you first need to find the point where they meet. First of all, you need to find the line the segments lie on: the formula is

y-y_0 = m(x-x_0)

where (x_0,y_0) is one of the points belonging to the line, and you already know how to find the slope. Then, you find the point of intersection, say A, by solving the system involving the two lines:

\begin{cases} y= m_{CE}x+q_{CE}\\ y = m_{DF}x+q_{DF} \end{cases}

And use again the formula for the distance between two points to prove that

d(A,C) = d(A,D) = d(A,E) = d(A,F)

4 0
3 years ago
Serrians triangle has a height of 3x-4 and the base length is 8x+4 what is the area of the triangle
kirill115 [55]
Area of a triangle is base × height ÷2
base=8x+4 x=-4/8 x=-1/2
height=3x-4 x=4/3

A=b×h÷2
A=(-1/2×4/3)÷2
A=(-4/6)÷2
A=(-4/6)÷2/1 to divide by fractions flip the second and multiply
A=-4/6×1/2
A=-4/12
A=-1/3
3 0
3 years ago
49 divided by ? makes the 49 a lower number?
ad-work [718]

Answer:

im not sure what you mean can you elaborate

Step-by-step explanation:

8 0
3 years ago
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