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liraira [26]
3 years ago
7

Find KJL (5x-2) (9x-62)

Mathematics
1 answer:
KiRa [710]3 years ago
5 0

Answer:

45x^2-328x+124

Step-by-step explanation:

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A boat goes 24 miles at a constant speed in 4 hours against a river current.
Ne4ueva [31]

Answer:

8 miles per hour.

Step-by-step explanation:

24miles in 4 hours = 24/4=6 miles per hour.

24 miles in 3 hours = 24/3=8 miles per hour. The boat going with the current of the river is traveling at 8 miles per hour.

7 0
2 years ago
The circumference of the equator of a sphere was measured to be 82 82 cm with a possible error of 0.5 0.5 cm. Use linear approxi
True [87]

Answer:

The maximum error in the calculated surface area is approximately 8.3083 square centimeters.

Step-by-step explanation:

The circumference (s), in centimeters, and the surface area (A_{s}), in square centimeters, of a sphere are represented by following formulas:

A_{s} = 4\pi\cdot r^{2} (1)

s = 2\pi\cdot r (2)

Where r is the radius of the sphere, in centimeters.

By applying (2) in (1), we derive this expression:

A_{s} = 4\pi\cdot \left(\frac{s}{2\pi} \right)^{2}

A_{s} = \frac{s^{2}}{\pi^{2}} (3)

By definition of Total Differential, which is equivalent to definition of Linear Approximation in this case, we determine an expression for the maximum error in the calculated surface area (\Delta A_{s}), in square centimeters:

\Delta A_{s} = \frac{\partial A_{s}}{\partial s} \cdot \Delta s

\Delta A_{s} = \frac{2\cdot s\cdot \Delta s}{\pi^{2}} (4)

Where:

s - Measure circumference, in centimeters.

\Delta s - Possible error in circumference, in centimeters.

If we know that s = 82\,cm and \Delta s = 0.5\,cm, then the maximum error is:

\Delta A_{s} \approx 8.3083\,cm^{2}

The maximum error in the calculated surface area is approximately 8.3083 square centimeters.

6 0
3 years ago
PLEASE HELP ASAP ILL MARK BRAINLIEST
Reptile [31]

Answer: 4\sqrt{3}-\sqrt{5}

Step by step:

2\sqrt{5}+4\sqrt{3}-3\sqrt{5}=4\sqrt{3}-\sqrt{5} This is the simplest form of this radical.

3 0
3 years ago
Which of the following is 16 60 in simplest form
Dafna1 [17]
There are no options given, but I will give you the exact answer of 16/60 simplified.

\frac{16}{60} \\ \\ GCF = 4 \\ \\ 16 \div 4 = 4 \\ \\ 60 \div 4 = 15 \\ \\  \frac{4}{15} \\ \\ Answer: \fbox {4/15} \ or \ \fbox {0.2667}
6 0
3 years ago
Read 2 more answers
Measure of angle 7 = 2x+15<br> measure of angle 8 = 3x
hichkok12 [17]
<span><span>4(1-2x)= 3(3-y)-12
4-8x=9-3y-12
-8x+3y=9-12-4
-8x+3y=-7
-----------------------
2(3x-1)-(y+4)= -7
6x-2-y-4=-7
6x-y=-7+2+4
6x-y=-1 multiply by 3 & add
18x-3y=-3
-8x+3y=-7
-------------
10x=-10
x=-10/10

x=-1 ans.
4(1-2*-1)=3(3-y)-12
4(1+2)=9-3y-12
4*3=-3-3y
12=-3-3y
3y=-3-12
3y=-15
y=-15/3
y=-5
Proof:
2(3*-1-1)-(-5+4)=-7
2(-3-1)-(-1)=-7
2*-4+1=-7
-8+1=-7
-7=-7
</span><span>
</span></span>
3 0
3 years ago
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