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Darina [25.2K]
3 years ago
13

Fifty decreased by twice a numebr

Mathematics
1 answer:
svp [43]3 years ago
6 0
Fifty decreased by twice a number is
2x-50
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Choose the equation below that represents the line passes to the point (7,-2) an the slope of -3
katrin [286]
Hello there!
 The answer is c because the equation that is being used is point-slope, which is:
y-y1=m(x-x1)
hope this helps
8 0
3 years ago
Simplify (-7b2)(-2b3)
Ivanshal [37]

Answer: 145

Step-by-step explanation:

(−72)(−23)

−72(−23)

1423

6 0
3 years ago
melissa and brian are at the base of a moutain. melissa hikes to a location 27 meters above sea.level brian hikes to a location
sweet [91]

Answer:

The difference is 48 meters

Step-by-step explanation:

<u><em>The question is</em></u>

What is the difference of the hikers' altitudes?

Let

x -----> the Melissa's altitude in meters

y ----> Brian's altitude in meters

we have that

x=+27\ ft ---> is positive because is above sea level

y=-21\ ft ---> is negative because is below sea level

Remember that the sea level is the altitude equal to zero

<em>Find the difference</em>

To find out the difference of the hikers' altitudes, subtract Brian's altitude from Melissa's altitude

so

27-(-21)

Remember that (-1)(-1)=+1

27+21=48\ m

7 0
4 years ago
X-2y+z=5 <br>3x+3y-2z=-6 <br>2x-y+3z=11 <br>find x+y+z
BartSMP [9]
      x - 2y + z = 5   | *2
 ⇒ 2x - 4y+ 2z=10
     3x + 3y - 2z = - 6     } I sum up these relations
--------------------------------
    2x+3x - 4y+3y+2z-2z=10-6
     5x - y = 4       (1)

    3x + 3y - 2z = - 6   | *3         ⇒ 9x + 9y - 6z = - 18
    2x - y + 3z = 11     | *2         ⇒ 4x - 2y + 6z= 22       I sum up these
                                              ----------------------------------
                                                ⇒ 9x+4x+9y-2y-6z+6z= 4
                                                     13x+ 7y= 4     (2)
I write (1) and (2)
5x - y = 4   | *7
35x - 7y= 28
13x+7y=4
48x = 32
x= 32/48=4/6 ( 32:8=4, 48:8=6)
x= 2/3
5x-y=4, 
5*2/3-y=4
y=10/3 -4=10/3-12/3=-2/3
⇒ y= - 2/3
x - 2y + z = 5
2/3 - 2*(-2/3)+z=5
2/3+4/3+z=5
6/3+z=5
2+z=5
z=3
x+y+z=2/3-2/3+3=3

x+y+z=3







3 0
3 years ago
Miss boone has 3 bowls of fruit 1st bowl has 75 apples 2nd has 75 more than 1st 3rd has 36 less than 2nd how much fruit in all
nekit [7.7K]

Answer:

So she will have a total of 339 apples

Step-by-step explanation:

Given:

Total bowls = 3

First bowl have = 75 apples

Second has 75 more then that

Third 36 less then second

To Find:

Total fruits = ?

Solution:

AS given First bowl have = 75 apples

Now according to conditions

Second bowl have = 75 + First bowl have

                                = 75 + 75

                                 = 150 apples

Now

Third bowl have = Second bowl - 36

                            = 150 -36

                            = 114

Total Apples = First bowl apples + second bowl apple + third bowl apples

Putting in the values

Total apples = 150 + 75 + 114

                      = 339

So she will have a total of 339 apples

6 0
4 years ago
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