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drek231 [11]
3 years ago
9

Please let me know the correct answer.

Mathematics
1 answer:
NNADVOKAT [17]3 years ago
4 0

Set h to 640 and solve for t:

640 = -490t^2 + 1120t

Subtract 640 from both sides:

-490t^2 + 1120t - 640 = 0

The formula to solve a quadratic equation is:

x = -b -/+ sqrtroot (b^2-4ac)/(2a) where a = -490, b = 1120 and c = -640

Solve:

x = -1120 -/+ sqrtroot (1120^2-4(-490)(-640) )/ 2(-490)

x = 8/7 = 1.1428 = 1.14

Time was 1.14 seconds

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Justin is 2 years older than one third Marcella’s age. Aimee is 5 years younger than 2 times Justin’s age. Define a variable and
KIM [24]

Answer:

Step-by-step explanation:

J = (1/3)M + 2 <=== ur expression would be : (1/3)M + 2

A = 2J - 5

if marcella is 63....

J = (1/3 * 63) + 2                              A = 2J - 5

J = 63/3 + 2                                    A = 2(23) - 5

J = 21 + 2                                        A = 46 - 5

J = 23 <== justin's age                   A = 41 <=== Aimee's age

4 0
3 years ago
Apply the communitive property to 13x7x21 to rearrange the terms and still get the same solution
Snezhnost [94]
The commutative porperty states that numbers can be swapped over , they can change their place in the equation and the result will still be the same.
In our case 13 x 7 x 21, the commutative property means that the numbers can be rearranged
13x7x21=13x21x7=7x21x13=7x13x21
5 0
3 years ago
Help me solve those show work 3(2a-5)=12-7a, 27=3c-3(6-2c)and 6c-8-2c=-16
posledela
3(2a-5) = 12-7a
6a-15=12-7a
6a+7a=12+15
13a= 27

27=3c-3(6-2c)
27=3c-18+6c
27+18=3c+6c
45=9c
C=45/9
C=5

6c-8-2c=-16
6c-2c=-16+8
4c=-8
C=-8/4
C=-2
3 0
3 years ago
What will be the sum of an integer and its additive inverse​
klemol [59]

Answer:

0

Step-by-step explanation:

4 is an integer

-4is its additive inverse

4+-4=0

5 1
3 years ago
WILL GIVE BRAINLIEST!!!!!!!!!!!!! Which of the following shows the length of the third side, in inches, of the triangle below?
Dmitriy789 [7]
<span>By the Pythagorean theorem:

</span>third \  side = \sqrt{74^2-24^2} =  \sqrt{5476-576}= \sqrt{4900}=70 \ in<span>
</span>
4 0
3 years ago
Read 2 more answers
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