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alexira [117]
2 years ago
8

Find two numbers . A and B , that have the product of 12 and the sum of 7

Mathematics
1 answer:
steposvetlana [31]2 years ago
3 0

Answer: XY = 12. X + Y = -7.

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Unit times for a job exhibit a learning effect. If the second unit took 30 hours, and the fourth unit took 21 hours, roughly how
malfutka [58]

Answer:

The answer is "24 Hours".

Step-by-step explanation:

The calculated time for 2^{nd}unit:

\to T_2 =T_1 \times (2)^{\frac{log(r)}{log(2)}}

        =30 ................(a)

Calculating the time for 4^{th}unit:

T_4=T_1\times (4)^{\frac{log(r)}{log(2)}}

     =21 ..............(b)

On dividing the value from equation (a) to (b):

 r= 0.7

Put the value of r into equation (a)  

T_1=42.8571

Calculating the value of time for 3^{rd} unit:

= 42.8571 \times (3)^{\frac{log(0.7)}{log(2)}} \\\\=24.35 \ Hours\\\\=24

6 0
2 years ago
There are 246 students going on a field trip to pan for gold if they are going in vans that hold 9 students each how many vans a
salantis [7]

You will need 28 vans. 3 students will ride in the van that isn't full.

4 0
3 years ago
Find the values of y which makes the expression (2y + 7) /(y2 - 2y - 15) undefined?
sammy [17]

The  given expression becomes undefined when y=5 or y = -3. The answer is option D.

Step-by-step explanation:

The value of the given expression becomes undefined when the denominator equals 0.

Hence to find the value of y which makes the expression undefined, we can equate the value of the denominator to zero and solve it .

Step 1

  Equate the denominator to 0.

  y^{2}  - 2y -15 = 0

Step 2

   Solve the above equation to get the value of y.

     y^{2}  - 2y -15 = 0

    => (y-5)(y+3) =0 [ Roots of the quadratic equation]

   => y = 5 or y = -3.

Hence when y = 5 or y = -3 the denominator becomes 0, which makes the expression (2y+7)/0  and hence it is undefined.

 

8 0
3 years ago
Divide and round to the nearest hundredths place.<br> 2.75 ÷ 6
-BARSIC- [3]
<span>2.75 ÷ 6
= 0.458333
= 0.46 ...r</span><span>ound to the nearest hundredths place

Answer
0.46</span>
3 0
3 years ago
Read 2 more answers
This test is literally the death of me but can anyone help?
Neporo4naja [7]

Answer:

answer is b

Step-by-step explanation:

i hope this helps you

7 0
2 years ago
Read 2 more answers
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