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Norma-Jean [14]
3 years ago
10

Which expression is equivalent to 18 1/5-(-22 2/5)-(-40 1/5)?

Mathematics
2 answers:
belka [17]3 years ago
5 0

The answer is D. Hope it helps!

Minchanka [31]3 years ago
4 0

Answer:

Step-by-step explanation:

D. 18 1/5 +22 2/5 +40 1/5

-(-22 2/5) and -(-40 1/5)    ----->  -*- will become +

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Water flows from the bottom of a storage tank at a rate of r(t) = 200 − 4t liters per minute, where 0 ≤ t ≤ 50. find the amount
Aleks [24]
The answer for your problem is shown on the picture.

5 0
3 years ago
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What value of x makes 1/2 (3x+4) =1/2
Sever21 [200]

Answer:

x = -1

Step-by-step explanation:

1/2 (3x +4 ) = 1/2

1/2 x 3x + 1/2 x 4 = 1/2

1.5 x + 2 = 1/2

1.5x = 1/2 -2

1.5x = -1.5

1.5x /1.5 = -1.5/1.5

x = -1

Check Back

1/2 ( 3 x -1 + 4) =1/2

1/2 ( 1) =1/2

1/2 =1/2

5 0
3 years ago
Can someone help me with number 4,5 and 6?
True [87]
4) You know slope-intercept form is y=mx+b. So using these two given points, you can find the slope! 

(-8,5)  (-3,10) [Use the y1-y2 over x1-x2 formula to solve for slope]

10 - 5         5
---------   = ----- = 1 
-3-(-8)         5

Hurray! You got a slope of one. Now substitute this back into your original equation:
y=mx+b --> y=1x+b 

Next, we find what our "b" is, or what our y-intercept is:
Using one of the previous points given, substitute them into the new equation:
[I used the point (-3, 10) ]

y=1x+b
10=1(-3)+b  SUBSTITUTE 
10=-3+b     MULTIPLY
10=-3+b
+3   +3    ADD
----------
13=b     SIMPLIFY 

So, now we have our y-intercept. Use this and plug it into the equation:
y=1x+b --> y=1x+13 

y=1x+13 is our final answer.



5) So for perpendicular lines, your slope will be the opposite reciprocal of the original slope. (Ex: Slope is 2, but perpendicular slope is -1/2) 

We have the equation y= 3x-1, so find the reciprocal slope! 
--> y=-1/3x-1 

Good! Now we take our given point, (9, -4) and plug it into the new equation:

y=-1/3x-1
-4=-1/3(9)+b   SUBSTITUTE and revert "-1" to "b", for we are trying to find the y-     -4=-3+b          intercept of our perpendicular equation. 
+3   +3            ADD
--------
-1=b    SIMPLIFY 

So, our final answer is y=-1/3x+(-1)

6) I don't know, sorry! :( 
4 0
3 years ago
I need help with this question I’ll give 15 points
weeeeeb [17]

Answer:

Calculating (5 x 2) violates the order of operations

Step-by-step explanation:

According to the order of operations, multiplies all have equal priority. Therefore, they must be evaluated left to right, not right to left. Evaluating (5 x 2) first is incorrect, and instead (9 x 5) should be calculated first.

3 0
2 years ago
Read 2 more answers
At these numbers functions: (1, 2), (2, 3), (3, 4), (4, 3)
Leona [35]

Answer:

(Add one then subtract one)

Step-by-step explanation:

8 0
3 years ago
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