X+3y=6 2x+8y=-12 Solve silmatenous equations
Answers
Regards,
ArmyCee:)
Answer:
[tex]x + 3y = 6 - - - (a) \\ 2x + 8y = - 12 - - - (b) \\ 2 \times (a) - (b) : \\ 0x - 2y = 24 \\ y = 12 \\ x + (3 \times - 12) = 6 \\ x = 42 \\ { \boxed{x = 42}} \\ { \boxed{y = 12}}[/tex]
Related Questions
5.
Peter earns $9 each hour for the first 40 hours he works each week. For every hour he
works after 40 hours, he earns $12 each hour. Last week Peter earned $444.
Which equation could be used to find the number of hours, h, during which Peter
earned $12 last week?
A. (40 x 9) + h = 444
B. (40 x 9) - h = 444
C. (40 x 9) + 12h = 444
D. (40 x 9) - 12h = 444
Answers
444-360 = 84
84 /12= 7
The answer is C
Find the surface area and volume of each cylinder:
a) Radius = 5 cm, height = 7.5 cm.
b) Diameter = 7 inches, height = 5 inches, state your answer in terms of .
Answers
Cylinder A -
Surface Area:
A = 2πrh + 2πr^2
A = 2 · π · 5 · 7.5 + 2 · π · 25 ≈ 392.69908
A = 392.7 cm^2
Volume:
V = πr^2h
V = π · 25 · 7.5 ≈ 589.04862
V = 589 cm^3
Cylinder B -
Surface Area:
A = 2πrh + 2πr^2
A = 2 · π · 3.5 · 5 + 2 · π · 12.25 ≈ 186.92476
A = 186.9 cm^2
Volume:
V = πr^2h
V = π · 12.25 · 5 ≈ 192.42255
V = 192.4 cm^3
Answer:
a) surface area: 125pi volume: 187.5pi
b) (i dont know what you mean by "in terms of ." so ill give both)
surface area: 210pi or 659.734 volume: 61.25pi or 192.422
Step-by-step explanation:
a) surface area is this
2pirh+2pir^2
plug it in..
2pi(5)(7.5)+2pi(5)^2
simplify...
75pi+50pi
125pi
volume is this
pir^2h
plug it in...
pi(5)^2(7.5)
simplify...
187.5pi
b is basically same steps.
(i had to replace all the pi symbols with "pi" because it was inappropriate???)
CAN SOMEONE HELP ME WITH THIS PLEASE AND THANK YOU.
Answers
Answer: 3 7/12
Step-by-step explanation:
1. Solving the whole number
4-1=3
2. Solving the fraction parts
3/4 - 1/6=
Find the LCM. The LCM is 12 so we rewrite the factions like this:
9/12-2/12=7/12
3. Add.
3+ 7/12= 3 7/12
Hey there!
4 3/4 - 1 1/6
= 19/4 - 7/6
= (19 × 6) - (7 × 4) / 4 × 6
19 × 6 = 114
7 × 4 = 28
= 114 - 28 / 4 × 6
4 × 6 = 24
114 - 28 / 24
114 - 28 = 86
= 86/24
= 3 7/12
Answer: 86/24 OR 3 7/12
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)
Find two integers whose sum is 5 and product is -66 TWO INTEGRES
NOT 1 TWO
Answers
Answer:
-6 and 11
Step-by-step explanation:
The only factors of 66 are 11, 6, 2 and 3
11*6 is the only pair whose product is 66
The difference betwen 11 and 6 is 5
11 must be positive and 6 negative since the sum is positve
5) If (x - 5) is a factor of 2r3 - 7px + (p - 12),
find the value of p.
{ANS: p = 7)
Answers
Answer:
the value of p is 7
Step-by-step explanation:
Given function;
f(x) = 2x³ - 7px + (p - 12)
factor of the given function = x - 5
Apply remainder theorem to solve for p
f(x - 5) = 0
x - 5 = 0
x = 5
f(5) = 2(5)³ - 7p(5) + (p - 12) = 0
2(125) - 35p + p - 12 = 0
250 - 34p - 12 = 0
238 - 34p = 0
34p = 238
p = 238/34
p = 7
Therefore, the value of p is 7
Please help!!
The picture of the question is attached...
Answers
Answer:
Proved
Step-by-step explanation:
picture above explains it but it requires me 20 words in order to answer this question so don't mind this. (If anyone is willing to help me answer my chemistry question, thanks)
Find the surface area of the triangular prism.
NO FAKE ANSWERS OR LINKS
Answers
Answer
177.62
Step-by-step explanation:
PLEASE HELP QUICKLY!!! There is a tree standing in the desert; the sun is rising to the east.
Answers
b. During morning, the sun-tree-shadow changes from 180° to 90°, during noon, angle =90°.During sunset the angle changes from 90 to 0°.
c. Acute angles created in afternoon.
d. A right angle would be created at noon.
e. Obtuse angle would be created in morning.
f. Yes, a straight angle would be created at sunrise.
g. When sun is at mid-morning, the angle=45°+90°= 135°
Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers.
Put the following values in order from smallest to largest.
NEED ANSWERS ASAP ASAP ASAP. ANSWER VERY QUICK PLEASE. ITS A TEST!!!
Answers
1/4 = 0.25
1/3 = 0.3333 repeating symbol
40% = 0.40
85% = 0.85
What is the value of x? Round the answer to the nearest tenth
Answers
Answer:
The answer is A.
Step-by-step explanation:
The answer is A because an obtuse angle rounds to 120 degrees, then you divide it by 6 which is A.
Rearrange the following numbers in order from least to greatest.
2, -7, 3, -9, -14, -8, 0, -10, -25
will mark the best answer or 1st answered brainliest or whatever
Answers
Answer:
-25, -14, -10, -9, -8, -7, 0, 2
Step-by-step explanation:
You do thing and it work
Rewrite this equation in Slope Intercept form and
solve the equation at x = -1. Show your work.
2x + y = 6
Answers
Answer:
y = -2x+6
y=8 when x = -1
Step-by-step explanation:
2x + y = 6
Slope intercept form is y = mx+b where m is the slope and y is the intercept
Solve for y
Subtract 2x from each side
y = -2x+6
The slope is -2 and the y intercept is -6
Let x = -1
y = -2(-1) +6
y = 2+6
y=8
(-1,8)
Answer:
y = -2x + 6
y = 8
Step-by-step explanation:
Rewrite this equation in Slope Intercept form
2x + y = 6
Subtract 2x from both sides
y = -2x + 6
------------------------------
solve the equation at x = -1
y = -2(-1) + 6
y = 2 + 6
y = 8
If g(x)= x+2/x-2 and h(x) = 4 - X, what is the value of (GoH)(-3)?
A.) 8/5
B.) 5/2
C.) 15/2
D.)18/5
Answers
Answer:
A. 8/5
Step-by-step explanation:
please be careful when typing the question. you made a mistake here (you wrote "x+2" instead of "x+1"). luckily you have provided also the screen shot.
the used symbolism of a composite function is nothing else than asking for
g(h(x)) for x=-3.
so, first we need to calculate h(-3) = 4 - -3 = 7
then we take that result as argument for g : g(7) = 8/5
so, altogether
g(h(-3)) = g(7) = 8/5
we can do this generically for x by substituting x in g by the expression of h
g(h(x)) = ((4-x) + 1) / ((4-x) - 2) = (5-x)/(2-x)
for x = -3 this gives (5- -3)/(2- -3) = 8/5
The value of the composite function (g o h) (-3) is 9/5.
What is a function?A function has an input and an output.
A function can be one-to-one or onto one.
It simply indicated the relationships between the input and the output.
Example:
f(x) = 2x + 1
f(1) = 2 + 1 = 3
f(2) = 2 x 2 + 1 = 4 + 1 = 5
The outputs of the functions are 3 and 5
The inputs of the function are 1 and 2.
We have,
First, we need to find the composition g o h, which means we need to substitute h(x) into g(x), so that:
(g o h)(x)
= g(h(x))
= g(4 - x)
= [(4 - x) + 2] / [(4 - x) - 2]
= (6 - x) / (2 - x)
Now, we can find (g o h)(-3) by substituting x = -3 into the expression above, which gives:
(g o h)(-3)
= (6 - (-3)) / (2 - (-3))
= 9 / 5
Therefore,
The value of (g o h)(-3) is 9/5.
Learn more about functions here:
https://brainly.com/question/28533782
#SPJ7
change 45' into seconds.
Answers
Answer:
2700 seconds
Step-by-step explanation:
The notation " ' " is said as "minutes".
° = degrees; ' = minutes; " = seconds
45 minutes
1 minute = 60 seconds
1*45=60*45
45 minutes = 2700 seconds
PLEASE HELP I'LL GIVE BRAINLIEST
Answers
Answer:
Step-by-step explanation:
3
which expression are equivalent to the given expression square root of 40
Answers
Answer:
2√10
Step-by-step explanation:
√40 = √(2 × 2 × 2 × 5) = 2√10.
True or False:
The value of y in the given equation is 18.
y + 17 = 36
True or false
Answers
Answer:
False ..... ....... . . .. ..
The circumference of a circle is 32 centimeters. Find the radius of this circle.
a. about 201.06 cm c. about 5.09 cm
b. about 100.53 cm d. about 10.19 cm
Answers
Answer:
r≈5.09cm
Step-by-step explanation:
Which expression(s) are equivalent to the given expression?
6x−18y+36
2(3x−9y+18) 2 times open paren 3 x minus 9 y plus 18 close paren
3(2x−6y+12) 3 times open paren 2 x minus 6 y plus 12 close paren
4(2x−14y+32) 4 times open paren 2 x minus 14 y plus 32 close paren
6(x−3y+36) 6 times open paren x minus 3 y plus 36 close paren
9(6x−2y+4)
Answers
Answer:
2 ( 3x - 9y + 18)
3 ( 3x - 6y + 12)
Inclusively:
6 ( x - 3y + 6)
Find the value of A
Answers
Answer:
a = 5
Step-by-step explanation:
Angles A and B are the same at 45, a and b are also the same
The law of sines is based on the proportionality of sides and angles in triangles. The law states that for the angles of a non-right triangle, each angle of the triangle has the same ratio of angle measure to sine value.
sin(A)/a = sin(B)/b = sin(C)/c
Substitute the known values into the law of sines to find a.
SinA / a = sin(90) / 5√2
a = 5
In ▵ABC, if m∠A=80 degree, then m∠c cannot be
A) 80 degree
B) 90 degree
C) 95 degree
D) 105 degree
Answers
Answer:
95
Step-by-step explanation:
jdisusyhsyysysyydyydyyddhdhhdhhdhhd random
Select the correct answer.
Simplify the expression 53 × 5-5.
Answers
Need to choose answers
Answers
Answer:
Box Number 3.
Step-by-step explanation:
4 is a coefficient in 4x because 4x is really 4*x which has 4 multiplying x. This is the same as 4 working with x. Also none of the other answers are true.
An airplane covers 1824 km in an hour How much distance will it cover in 3.7 hours
Answers
Answer:
6748.8 km
Step-by-step explanation:
in 1 hour = 1824
in 3.7 hour = 1824×3.7
=6748.8 km
what is 5/20 as a percent if you could give an explanation that would be good but if not thats okay
Answers
Answer:25%
Step-by-step explanation:A pectange has to be out of 100 so that means 5/20 is 25/100 because 20 times 5 equals 100 and 5 times 5 equals 25 making it 25%.
Pls help.
Thank You So Much if you did!
Answers
Answer:
1 a) 124
Step-by-step explanation:
x +1 /5 =25
x +1 =25*5
x+ 1=125
x = 125-1
x=124
2x-1/4 + x/3 = 2
Solve the equation
Answers
Answer:
below
Step-by-step explanation:
steps are shown above
sofia uses 8 gallons of gas to drive 204 miles. at the same rate, How many miles can sofia drive using 18 gallons of gas?
Answers
Answer:
Sophia can drive 3672 miles using 18 galloons of gas.
Step-by-step explanation:
204 x 18 = 3672.
Calculate miles per gallon by dividing the miles she drove you the gallons used:
204/8 = 25.5 miles per gallon.
Now multiply miles per gallon by gallons:
25.5 x 18 = 459 miles
Answer: 459 miles
How many isosceles triangles in this pentagon?
Answers
Answer:
6 triangles
i am not very sure thou
answer as soon as possible
Answers
Answer:
a). 840 b). 14
Step-by-step explanation:
a). 840 miles
350 miles ÷ 25 gallons = 14
14 (miles per gallon) x 60 gallons of gas = 840
b). 14
(first step of the first answer)
350 miles ÷ 25 gallons = 14 miles per gallon
hope this helped!
a) 840 miles can go for 60 gallons of gas.
b) The mileage is 14 miles per gallon.
Here, we have,
given that,
A new truck can travel 350 miles on 25 gallons of gas.
now, we have,
a). we get,
the milage of the truck is:
350 miles ÷ 25 gallons = 14
so, we get,
for 60 gallons of gas it can go:
14 (miles per gallon) x 60 gallons of gas = 840
so, 840 miles can go for 60 gallons of gas.
b). and, again we have,
the milage of the truck is:
(first step of the first answer)
350 miles ÷ 25 gallons = 14 miles per gallon
so, The mileage is 14 miles per gallon.
To learn more on multiplication click:
brainly.com/question/5992872
#SPJ2