A pound of beans costs $4.70. Mrs. Patel buys 6.5 pounds of beans. How much dose she pay for the beans ?
Answers
$30.55 ----------------------------------------- 4.70 x 6.5 _____ 2350 28200 _______ 30.550
4.70 x 6 ( lbs) 28.20
4.70 divided by 2 is 2.35
28.20 +2.35 = 30.55
Last month, Margo bought a tree that grows 2.5cm each day. It was 5cm tall when she bought it and now it is 65cm tall.
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Margo bought that tree when it was 5cm, If you are calculating how long she had had that tree than the answer is 24 days (2.5*(65-5)) However if you are calculating what is the age of that tree then it’s 26 days. I am pretty sure this is right answer
Do you want to know how many days it took to reach that point? If so the answer is 24 days that it got from 5cm to 65cm.
The coordinates below represent two linear equations. How many solutions does this system of equations have?
Line 1 x y –2 7 0 6
Line 2 x y 3 0 0 –3
A.
0
B.
exactly 1
C.
exactly 2
D.
infinitely many
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find the equations of the lines in slope-intercept form which is y=mx+b where m=slope b=y intercept the choices: 0 solutions: means the lines don't intercect at all, meaning same slope but different y intercept or they ar paralell 1 solution: lines intercect in 1 point 2 solutions: curvy line with a straight line thorugh middle infinetly solutions: same line
to find slope you do slope=(y1-y2)/(x1-x2) first line is (2,-7) (0,6) (x,y) x1=2 y1=-7 x2=0 y2=6 subsitute (-7-6)/(2-0)=-13/2 slope=-13/2 subsitute y=-13/2x+b subsitute one of the points (0,6) x=0 y=6 6=-13/2(0)+b 6=0+b 6=b y=-13/2+6
we have the lines y=-13/2x-6 and y=x-3 solve for a common solution y=x-3 and y=-13/2x-6 therefor x-3=-13/2x-6 add 6 to both sides x+3=-13/2x multiply both sides by -2 -2x-6=13x add 2x to both sides -6=15x divide both sides by 15 -2/5=x subsitute y=x-3 y=-2/5-3 y=-3 and 2/5 or -17/5 the solution is (-2/5, -17/5) there is only one solution the answer is B
A certain colony of bacteria triples in length every 10min. Its length is now 1 millimeter. how long will it be in 40min?(show work please! and in a 6th grader form)
Answers
Bacteria length = 1mm
It will triple four times by 40 min.
This can be shown as 3 to the power of 4; 3⁴ = 81
Original length * growth factor = final length
1 mm * 81 = final length
81 = final length
After 40 mins, the bacteria colony will be 81 mm in length.
Think of it this way. Every ten minutes, its length is multiplied by 3.
After 10 minutes, it will be 3 ml long. After 20 minutes, it will be 9 ml long. After 30 minutes, it will be 27 ml long. After 40 minutes, it will be 81ml long.
In other words, 1x3x3x3x3=81
What is the sum of two intergers with different sighs is 8. Give two possible intergers
Answers
You can use positive 10 and -2 and you'll get a positive 8
What does -4/5 = 1 = - 13 equal
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There are two equations there.
-4/5 = 1 and 1 = -13 .
Both of them are false statements.
The question, in total, has no mathematical significance.