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prohojiy [21]
4 years ago
9

What is the simplified value of 40+2⋅3−2 and 40+2⋅3−2 and 9+32−1⋅4

Mathematics
1 answer:
Alona [7]4 years ago
3 0
40+2*3-2= 44
9+32-1*4= 37
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Three pens cost $2.70.what is the cost for one?
Molodets [167]
<span>HELLO 

3 = 2.70

1 = x

2,70 ÷ 3 = 0,9

1 pen = 0,9 dolar</span>
3 0
4 years ago
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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Kitty [74]

Answer:   (-2, 5) and (2, -3)

<u>Step-by-step explanation:</u>

Graph the line y = -2x + 1 (which is in y = mx + b format) by plotting the y-intercept (b = 1) on the y-axis and then using the slope (m = -2) to plot the second point by going down 2 and right 1 unit from the first point:

        y - intercept = (0, 1)            2nd point = ( -1, 1).

Graph the parabola y = x² - 2x - 3 by first plotting the vertex and then plotting the y-intercept (or some other point):

y = x^2-2x-3\quad \rightarrow \quad a=1,\ b=-2,\ c=-3\\\\\text{axis of symmetry:}\ x = \dfrac{-b}{2a}\ \longrightarrow \ x=\dfrac{-(-2)}{2(1)}=\dfrac{2}{2}=1\\\\\text{y-value of vertex:}\ f(1) = (1)^2-2(1)-3\quad \longrightarrow \quad y = 1 - 2 - 3=-4\\\\\text{y-intercept:}\ f(0)= (0)^2-2(0)-3\ \longrightarrow \ y=0 - 0 - 3 = -3 \\

         vertex = (1, -4)                2nd point (y-intercept) = (0, -3)


<em>see attached</em> - the graphs intersect at two points:  (-2, 5) and (2, -3)


8 0
3 years ago
1. On her birthday, Shruti bought 2 kg sweets and distributed 1 kg 500 g among her classmates. How much sweets were left with he
uysha [10]

Answer:

500g

Step-by-step explanation:

since she brought 2 kg of sweets, and distributed to her classmates, that means we wil sustract 2 from 1,5 and that will be 0.5 or 500g

I hope I helped you! :)))

7 0
2 years ago
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What is the sum of x?
Korolek [52]

Answer:

the answer is 40

Step-by-step explanation:

x+60

x=60-20

x=20

3 0
3 years ago
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A student would like to find the height of a statue. The length of the​ statue's right arm is 54 feet. The​ student's right arm
Komok [63]

Answer:


a) Approximate height of the statue: 144 feet

b) The approximate height is 1.7% greater that the actual height of the statue.


Explanation


1) Assume that the measures of the statue are proportional to the dimensions of the student. That means:


        statue's height                                   student's height

________________________   =    ______________________

length of the​ statue's right arm          length of student's right arm


⇒ x / 54 feet = (5 + 1/3) feet / 2 feet


⇒ x = 54 × (16/3) / 2 feet = (54×16) / (3×2) feet = 144 feet


Answer: 144 feet


2) Compare the approximate heigth obtained with the actual height:


144 feet - (143 feet + 9 inches) = 144 feet - (143 feet + 9/12 feet) = 1 feet - 9/12 feet


1 feet - 9/12 feet = 1 feet - 3/4 feet = 1/4 feet.


Hence, the approximate feet obtained is 1/4 feet larger than the actual height.


In relative terms that is : (1/4) / (143 + 3/4) = 0.0017 = 1.7%.

4 0
3 years ago
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