Solve the following using substitution
Y = 2X - 3
4X -3Y = 31
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Answer:
Step-by-step explanation:
Related Questions
If a=b+7 and b+7=9, then a=9
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Answer:
a = 9
b = 2
Step-by-step explanation:
Given : a = 9
a = b + 7
9 = b + 7
b = 9 - 7 = 2
Please help! You don’t have to explain how you got the answer! Tysm.
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2.) .8
3.) .6
4.) .285714286
5.) .15
For each ordered pair in the table, how does the second number compare to the first number... can yall tell me I need to turn it in Tomorrow!!??
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Answer:
The first number in each ordered pair tells how far across the X line is to move. The second number in each ordered pair tells how far up or down the Y line is to move. The point where the X and Y lines cross is marked “0” on the graph. It is called the “origin,” and is the starting point for plotting points.
Help geometry need help
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what is the anwser to this on the number line 7 - 6y > 19
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Answer:
y < -2
Step-by-step explanation:
7 - 6y > 19
Subtract 7 from each side
7-7 - 6y > 19-7
-6y > 12
Divide each side by -6. remembering to flip the inequality
-6y/-6 < 12/-6
y < -2
This is confusing and makes no sense
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Answer:
A is the answer
rrrrrrrr
helpppppppppp it’s multiple choice questions I’ll brainlist!
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Answer:#1 is D
Step-by-step explanation:angles must equal 180 and yk that the angle under e is 39 so 180-39 =141
11. Eve reads 25 pages per hour. Write an expression for the number of pages she reads
in h hours.
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Answer:
25h = x
Step-by-step explanation:
If x is the variable for how many pages she reads in total, 25 multiplied by h (the number of hours) will give you the total pages read!
So;
25 x 1(total hours) = 25xh = 25h
how many seconds are in 5 hours abs 30 minutes
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Answer:
19800 seconds
Step-by-step explanation:
(Please help, I don't understand) Use the distance formula to find the distance between each pair of points:
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Step-by-step explanation:
Distance = √(x_2 - x_1)² + (y_2 - y_1)²
Distance = √[(-a) - a]² + (b - b)²
Distance = √[-2a]² + (0)²
Distance = √4a²
Distance = 2a
Angle A is three times the size of angle B.
The sum of the angle measures is 128 degrees.
What is the measure of angle A?
O 32 degrees
O 90 degrees
O 96 degrees
O 30 degrees
Answers
First, let's declare our variables
B = x+2
A = 3(x+2)
Now, let's create our expression.
A + B = 128
Plug in the values for A and B
x+2 + 3(x+2) = 128
We need to solve for x. Start off by simplifying the left side.
x+2 + 3x + 6 = 128
Combine like terms.
4x + 8 = 128
Subtract 8 from both sides.
4x = 120
Divide both sides by 4
x = 30
B = x+2 = 30 + 2 = 32 degrees
A = 3(x+2) = 3(30+2) = 3(32) = 96 degrees
Which of the following points lies on the line 2x+y=6? 1. (1.4) 2.(0,6) 3. (2,0) A. I only B. 2 only C. 3 only D. 1 and 2 only E. 2 and 3 only
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If 3x = y -5 and x = 4, then y =
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Answer:
y = 17
Step-by-step explanation:
3x = y - 5, for x = 4
=> 3(4) = y - 5
=> 12 = y - 5
=> 12 + 5 = y
=> 17 = y
Help please ill give you brainlest
Is this correct??
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which of the following is the best estimate of the square root of 90
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Answer:
9.5
Step-by-step explanation:
9.5x9.5= 90.25 which is the closest you can get without going into further decimals
is -15 an integer and rational number?
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Answer:
I guess it would help you
Which is greater 55.5% or 3/5
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Answer:
3/5
Step-by-step explanation:
3 divided by 5 is 0.6, which translates to 60%.
55.5% < 60%
Answer:
3/5 is the greater .
I hope it will help you. Have a great day ahead.
One of the two equal factors of a number is a _______?
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Answer:
A square root
Step-by-step explanation:
A square root is one of two equal factors of a number.
How many milligrams are equal to 39 grams?
A 390 milligrams
B 390,000 milligrams
C 3,900 milligrams
D 39,000 milligrams
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Answer:
39000
1 gram=1000milligrams
hence,
39 grams=39×1000milligrams
=39000milligrams
V= 1/3Bh solve for H
A. 3b/v
B. b/3v
C. v/3b
D. 3v/b
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Answer: D
Step-by-step explanation:
v = 1/3bh
3v/b = h
Solve for x and show work I will mark brainlyest
3(x-2) + 7 = 2(x+5)
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Answer:
Step-by-step explanation: please do mark as brainliest
plz help me plz and correctly!!!! only 3 questions plz!!! 100 points
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Answer:
Step-by-step explanation:
6)b) Sin A - x Cos A = 0
Sin A = x Cos A
[tex]\dfrac{Sin \ A}{Cos \ A} = x[/tex]
[tex]\dfrac{1}{x}=\dfrac{1}{\dfrac{Sin \ A }{Cos \ A}}=1*\dfrac{Cos \ A}{Sin \ A}=\dfrac{Cos \ A}{Sin \ A}[/tex]
[tex]RHS = x +\dfrac{1}{x}\\\\\\[/tex]
[tex]= \dfrac{Sin \ A}{Cos \ A}+\dfrac{Cos \ A}{Sin \ A}\\\\\\=\dfrac{Sin \ A*Sin \ A}{Cos \ A*Sin \ A}+\dfrac{Cos \ A * Cos \ A}{Sin \ A* Cos \ A}\\\\\\= \dfrac{Sin^{2} \ A}{Cos \ A*Sin \ A}+\dfrac{Cos^{2} \ A}{Cos \ A* Sin \ A}\\\\= \dfrac{Sin^{2} \ A+Cos^{2} \ A}{Cos \ A*Sin \ A}\\\\=\dfrac{1}{Cos \A*Sin \ A}\\\\= \dfrac{1}{Cos \ A}*\dfrac{1}{Sin \ A}\\\\=Sec \ A * Cosec \ A[/tex]
= LHS
7a) 1 - Sin A = 1/2
[tex]1 = \dfrac{1}{2}+ Sin \ A\\\\1-\dfrac{1}{2}=Sin \ A\\\\\dfrac{1}{2}=Sin \ A\\[/tex]
⇒ A = 30°
Sec² A = Sec² 30° = [tex](\frac{2}{\sqrt{3}})^{2}=\frac{2^{2}}{(\sqrt{3)^{2}}}=\frac{4}{3}[/tex]
[tex]tan^{2} \ A = tan^{2} 30 = (\dfrac{1}{\sqrt{3}})^{2} = \dfrac{1}{3}[/tex]
LHS = 6 Sec² A + 9 tan² A
[tex]= 6*\dfrac{4}{3}+9*\dfrac{1}{3}\\\\\\=2*4 + 3*1\\\\\\= 8 + 3\\\\= 11 = RHS[/tex]
need help with this please..
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Answer:
.1/2
Step-by-step explanation:
is the same as 20÷40
which gives you 1/2
Find the measures of the indicated angles pictures included!!!
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Answer:
25
Step-by-step explanation:
The angles b and 65 are complementary, meaning they sum to 90 degrees. You know this because those 2 angles and the right angle are sitting on a straight line. So, together they equal 180 and 180-90 is 90. Therefore, angle b+65 must equal 90. So, simply subtract 65 from 90 to get the answer, 25.
x= -6, Y= 9 and z = -2 evaluate the expression. -5 x Y - (X^4)/ Y-2z
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Answer:
418
Step-by-step explanation:
please make me brainlist
Anyone? Got an ideas
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Factorise : a²+b²-c²+2ab
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Answer:
Step-by-step explanation:
a²+b²-c²+2ab
=a²+b²+2ab-c²
=(a+b)²-c²
=(a+b+c)(a+b-c)
If a block has a volume of 216 cm³ in length and width of sides respectively 12 cm and 6 cm. What is the height of the cuboid?
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Step-by-step explanation:
I hope it helped U
Yea also all of this
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Answer:
yea I cant really do this over a screen
Answer:
16) photo
Step-by-step explanation:
- parallel lines never meet (a, b, c have no points in common)
- perpendicular lines meet other lines at one point, forming two angles of 90 °
how do you solve x/4+7=-2
Answers
[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]
How do you solve x/4+7 = -2[tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]
[tex] \large \sf \frac{x }{4} + 7 = - 2 \\ [/tex]
Multiply both sides of the equation by 4.[tex] \large \sf \: x+28=-8 [/tex]
Subtract 28 from both sides.[tex] \large \sf \: x=-8-28 [/tex]
Subtract 28 from -8 to get -36.[tex] \large \boxed{ \bf \: x=-36 }[/tex]
