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ozzi
3 years ago
13

Use parentheses to make each number sentence true 1+2×3+4=21​

Mathematics
1 answer:
Nastasia [14]3 years ago
6 0
(1+2)(3+4)
1+2=3
3+4=7
7•3=21
There is an invisible multiplication sign between the two parentheses :).
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If x is a number that satisfies 4x+3=18, can x be equal to 3? explain.
Akimi4 [234]
The answer is no. because is you substitute the value 3 in for x into the equation and solve you get,

4(3)+3=18 which says 12+3=18 15=18 and that is an untrue statement. 
Hope this helps explain the concept so you understand! Any questions feel free to ask! Please rate if I helped you! thank you so much!!
4 0
3 years ago
Read 2 more answers
henry has 68 miles to destination after 45 minutes and 51.5 miles to destination after 71 minutes of driving. How many miles to
Airida [17]
Let d represent the distance of the destination from the starting point.

After 45 min, Henry has already driven d-68 miles.  After 71 min., he has already driven d-51.5 miles.

So we have 2 points on a straight line:

(45,d-68) and (71,d-51.5).  Let's find the slope of the line thru these 2 points:

                                 d-51.5 - (d-68)         16.5 miles
slope of line = m = ----------------------- = ------------------
                                     71 - 45                   26 min

Thus, the slope, m, is   m = 0.635 miles/min

The distance to his destination would be d - (0.635 miles/min)(79 min), or 

d - 50.135 miles.  We don't know how far his destination is from his starting point, so represent that by "d."

After 45 minutes:  Henry has d - 68 miles to go;

After 71 minutes, he has        d - 51.5 miles to go; and

After 79 minutes, he has         d -  x miles to go.  We need to find x.

Actually, much of this is unnecessary.  Assuming that Henry's speed is 0.635 miles/ min, and knowing that there are 8 minutes between 71 and 79 minutes, we can figure that the distance traveled during those 8 minutes is

(0.635 miles/min)(8 min) = 5.08 miles.  Subtracting thix from 51.5 miles, we conclude that after 79 minutes, Henry has (51.5-5.08), or 46.42, miles left before he reaches his destination.




7 0
3 years ago
PLS HELP ME! I DONT KNOW WHAT TO DO FOR THIS
kotykmax [81]

Answer:

Step-by-step explanation:

subtract llol

first 1

x .   y

1 .    2

3 .   4   rewrite =y/x

2-4/1-3

-2/2=-1

do for the rest bye

8 0
3 years ago
Read 2 more answers
a rectangular photograph has an area of 104 square inches. if the width of the photograph is 5 inches less than its hight, find
Umnica [9.8K]
Height is 13 inches. width is 8 inches. dimensions is 42 inches
5 0
3 years ago
The number z and -1.9 are additive inverse’s. Drag and drop -1.9 and z to their correct positions on number line . Drag and drop
juin [17]
Additive inverses add to zero. the additive inverse of any number is just that number multiplied by -1. the additive inverse -1.9 is+1.9 because when you add them the result is zero
5 0
4 years ago
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