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stich3 [128]
3 years ago
7

John mows 40% in 20 minutes, How much more time does he need?

Mathematics
2 answers:
Travka [436]3 years ago
7 0
30 more mins.because 40 percent in 20 mins=80 percent in 40 mins
and the 20 percent left is the same thing as 40/2 so then you also have to do 20mins/2=10
Aleksandr-060686 [28]3 years ago
7 0
8 mins because 40 percent of 20 equals 8
So the answer is 8 minutes


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Two six-sided dice are rolled (one red and one green). Some possibilities are (Red=1,Green=5) or (Red=2,Green=2) etc.
klasskru [66]
A.) There are going to be 72 total possibilities. 
Because if you have 6 times 6 is 36 times 2 is 72. 
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C.) The probability that the sum on the two dice comes out to be 7 is 6:72 
Because you have (6,1) (1,6) (5,2) (2,5) (4,3) (3,4) 
D.) The probability that the numbers on the two dice are equal is 6:72 
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6 0
4 years ago
Please please help me with this question please now and show your steps
sattari [20]

Answer:

y =  {x}^{2}  - 8x + 7 \\ a = 1 \: and \: b = -  8 \\ the \: line \: of \: symmetry \:  \\ x =  \frac{ - b}{2a}  =  \frac{8}{2}   \\ x = 4(line \: of \: symmetry) \\ y =  {4}^{2}  - 8(4) + 7  \\ = 16 + 32 + 7 = y = 55 \\ vertix \: is \: (4  ,55) \\ y =  {0}^{2}  - 8(0) + 7 \\ y = 7 \\ 0 =  {x}^{2}  - 8x + 7 \\ (x - 7)(x - 1) = 0

6 0
3 years ago
Which graph shows the solution to the system of linear inequalities?<br> y&lt; 2x-5<br> y&gt;-3x + 1
trapecia [35]

Answer:

See explanation

Step-by-step explanation:

Plot the solution sets to both inequalities.

1. For the inequality y First, plot the dotted line y=2x+5 (dotted because sign is without notion "or equal to"), then choose correct part by substitution coordinates of the origin.

2\cdot 0-5=-5

so the origin does not belong to the needed part. Shade the part, which does not include origin.

2. For the inequality y>-3x+1. First, plot the dotted line y=-3x+1 (dotted because sign is without notion "or equal to"), then choose correct part by substitution coordinates of the origin.

-3\cdot 0+1=1>0

so the origin does not belong to the needed part. Shade the part, which does not include origin.

3. Find the common region of these two shaded parts - this is the solution to the system of two inequalities.

5 0
4 years ago
Delaney has $28.00 and buys a shirt for 14.00. Delaney used the equation 14x = 28 to model her scenario, where x represents the
maksim [4K]
She is incorrect because 14 multiplied by 2 equals 28, which means she wouldn’t have any money left over.
5 0
3 years ago
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elena55 [62]

If the ratio is 14 childen to every 5 teachers, and there are thirty teachers... there are 84 children. hope I could help!

6 0
3 years ago
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