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nadya68 [22]
3 years ago
5

Jay can paint a car in six hours. mike can paint the same car in three hours. if they work together, how long will it take them

to paint the car?
Mathematics
1 answer:
pentagon [3]3 years ago
7 0
Let x be number of hours taken working together, then:-

1/6 + 1/3  = 1 / x

* thru by the LCD 6x:-

x + 2x = 6
3x = 6
x = 2

Answer:-   they will take 2 hours.
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Sue has 100 dimes and quarters. If the total value of the coins is $21.40, how many of each kind of coins does she have?
Nookie1986 [14]

Answer:

There would be 24 dimes and 76 quarters.

Step-by-step explanation:

In order to find this, start by defining the number of dimes by x and the number of quarters as y. Now we can create a system of equations. Make the first about the total number of coins.

x + y = 100

Make the second about the amount of money.

.10x + .25y = 21.40

Now we can solve using elimination by multiplying the second equation by -4 and adding through.

x + y = 100

-.40x - y = -85.60

-----------------------

.60x = 14.4

x = 24

Now we can use the amount of dimes we have to find the number of quarters.

x + y = 100

24 + y = 100

y = 76

3 0
3 years ago
What is the square root of 756 to the nearest tenth?​
Mama L [17]

Answer:

760

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Find each x-value at which f is discontinuous and for each x-value, determine whether f is continuous from the right, or from th
Alexus [3.1K]

Answer:

the function is continuous from the left at x=1 and continuous from the right at x=0

Step-by-step explanation:

a function is continuous from the right , when

when x→a⁺ lim f(x)=f(a)

and from the left when

when x→a⁻ lim f(x)=f(a)

then since the functions presented are continuous , we have to look for discontinuities only when the functions change

for x=0

when x→0⁺ lim f(x)=lim  e^x = e^0 = 1

when x→0⁻ lim f(x)=lim  (x+4) = (0+4) = 4

then since f(0) = e^0=1 , the function is continuous from the right at x=0

for x=1

when x→1⁺ lim f(x)=lim  (8-x) = (8-0) = 8

when x→1⁻ lim f(x)=lim e^x = e^1 = e

then since f(1) = e^1=e , the function is continuous from the left at x=1

6 0
3 years ago
X+6/x+3 X x-6/x-3<br><br> A. 2x-12/x-3<br> B. x-12/x-6<br> C. x^2-12/x^2-6<br> D. x^2-36/x^2-9
tatyana61 [14]

d

Step-by-step explanation:

8 0
1 year ago
ANSWER PLEASSSSSSSSSSSE
kolezko [41]

Answer:

The answer is A hope this helps

Step-by-step explanation:

3x^2+14x+16=0

(3x+8)(x+2)=0

x=-8/3 or -2

7 0
3 years ago
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