Answers
9514 1404 393
Answer:
to eliminate x: multiply the first by 3, and the second by -4to eliminate y: multiply the first by 2, and the second by 5Step-by-step explanation:
Pick the variable you want to eliminate. Determine the coefficients of that variable in the two equations. Negate one of them. Multiply each equation by the coefficient that came from the other equation.
__
To eliminate x
The x-coefficients are 4 and 3. If we negate 4, then the resulting y-coefficient will be positive. We choose to multiply the first equation by 3, the second by -4.
Here is the result of adding those:
3(4x +5y) -4(3x -2y) = 3(7) -4(-12) ⇒ 23y = 69
To eliminate y
The y-coefficients are 5 and -2. If we negate -2, then the resulting x-coefficient will be positive. We choose to multiply the first equation by 2 and the second by 5.
Here is the result of adding those:
2(4x +5y) +5(3x -2y) = 2(7) +5(-12) ⇒ 23x = -46
Answer:
Step-by-step explanation:
to kill x: duplicate the primary by 3, and the moment by -4 to eliminate y: increase the primary by 2, and the moment by 5 Step-by-step explanation: Pick the variable you need to eliminate. Decide the coefficients of that variable within the two conditions. Refute one of them. Increase each condition by the coefficient that came from the other equation. __ To dispense with x The x-coefficients are 4 and 3. On the off chance that we invalidate 4, then the coming about y-coefficient will be positive. We select to increase the primary condition by 3, the moment by -4. Here is the result of including those: 3(4x +5y) -4(3x -2y) = 3(7) -4(-12) ⇒ 23y = 69 To dispose of y The y-coefficients are 5 and -2. If we nullify -2, at that point the coming about x-coefficient will be positive. We select to duplicate the primary condition by 2 and the moment by 5. Here is the result of including those: 2(4x +5y) +5(3x -2y) = 2(7) +5(-12) ⇒ 23x = -46
hope this helps
Related Questions
r = x^2/y work out the value of r
Answers
Answer:
r=244745.8 (approximately)
Step-by-step explanation:
r=x²/y
ry-x²=0
r(59000)-(380000)²=0
r=380000²/59000
r=144400000/59
r=244745.8 (approximately)
is the answer 117? or am i wrong
Answers
Answer:
Correct
Step-by-step explanation:
You do the equation the same as you would a rectangle.
9 * 13 = 117
Answer:
well you need to do this,(2 times 9)+(2 times 13) =44
Step-by-step explanation:
Assume that it is equally likely for a child to be born a boy or a girl and that the Lin family is planning on having 2 children. How many elements are
there in the samples space for the genders of the two children?
Answers
Answer: It depends on if the girl genes are dominant or if the boy genes are recessive. If the girl genes are more dominant then Lin is probably going to have more girls than boys.
Step-by-step explanation: Listen I haven't gotten the question yet so I don't know the answer
There are 72 female performers in a dance recital. The ratio of men to women is 2:9. How many men are in the dance recital?
Answers
Answer:
48
Step-by-step explanation:
72 ÷ 3 = 24
so you know that the men is 24 × 2 = 48
48:72 = 2:3
i looked it up and it says x=4 and theres 12 men but i dont think that helps im so sorry i couldnt find anything:(
Last year, Ivy's pant measured 12 inches. This year, her plant is 75% taller.
How many inches did her plant grow?
Answers
Answer:
The plant grew 9 more inches since last year.
Step-by-step explanation:
75% of 12 is 9 and the initial plant growth was 12 inches.
So, the plant grew 9 more inches since last year.
The plant is now 21 inches.
Answer:
9
Step-by-step explanation:
Divide 12 by 4 to get 25% = 3
25% x 3 = 75%
3 x 3 = 9
What is the slope of the linear function represented in
the table?
Answers
Answer: 1/7
Step-by-step explanation: The points create a posotive line so the answer has to be posotive. You then have to look at the rise over run. (0,1) is 1 unit higher than (-7,0) and the run is the ditance between the 2 x exvalues. 7. Rise/run = 1/7
please help asap!! for finals!! semi easy question! will mark brainliest!! not multiple choice! tysm !!
Answers
Answer: 42 gallons
Step-by-step explanation:
1,260/180 = 7
Per 180 mile = 6 gallon
7x6=42
I’m doing a percent equation I need help please here’s the question. Blank percent of 20 = 14
Answers
Answer:
x = 70
Step-by-step explanation:
x% 20 = 14
x / 100 * 20 = 14
x / 5 = 14
x = 14 * 5
14*5=70
Answer: 70%
If
x
=
5
and
y
=
4
, evaluate the following expression:
3
x
²
+
3
x
y
+
y
²
Answers
Step-by-step explanation:
3x²+3xy+y²
3×5²+3×5×4+4²
3×25+60+16
75+60+16
151
hope it help u
can u show horozontally
WILL GIVE BRAILLEST IF YOU HELP ME!
Answers
Answer:
3 centimeters per minute so solving the equation 15 divided by 4 for the y value equal to 30
Step-by-step explanation:
BRAINLIEST PLEASE
the answer for:
Consider the quadratic equation x^2 - 6x - 16 = 0.
A. Solve the equation, and discuss how the type of roots affects the appearance of the graph of the function y = x^2 - 6x - 16.
B. What is the vertex of the graph of x^2 - 6x - 16 = 0?
C. What is the equation of the axis of symmetry?
D. Use this information to draw a rough sketch of the graph of the function.
Answers
Answer:
A. Solution=(x-8)(x+2),Zeros are 8,-2
The integer coefficient of x² is >1 and so the graph which is a parabola,curves downward and opens upward
B. The vertex or turning point is the minimum point =-b/2a=-(-6)/2(1)=3
f(3)=(3)²-6(3)-16=-25
the vertex occurs at y=-25
C. Equation of the axis of symmetry =-b/2a
which is x=3
PLEASE HELP THIS IS DUE AT 11!!!!!!!!!!! (-3v+1)+7-(6v+6)=-37
A 4
B -2
C 2
D 0
Answers
Answer:
v = 13/3
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Step-by-step explanation:
Step 1: Define
(-3v + 1) + 7 - (6v + 6) = -37
Step 2: Solve for v
Distribute negative: -3v + 1 + 7 - 6v - 6 = -37Combine like terms: -9v + 2 = -37Isolate v term: -9v = -39Isolate v: v = 13/3i need help with math rlly bad
Answers
Step-by-step explanation:
what's the question sweetie?
Can someone please help me, i've just been sitting here trying to figure this out. please help me
Answers
Answer:
A) y=0.45x + 2.9
B) the plant grows 0,45 inches per day
C) the height and the number of days are highly related
D) 5.55
Step-by-step explanation:
Am in a rush sorry lol don’t have time to explain
Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!
Answers
A wouldn’t work, because 11 + 21 = 32, which is smaller than 33.
B wouldn’t work either, because 14 + 27 = 41, which is smaller than 43
C would work, because 11 + 13 = 24, which is larger than 23
D wouldn’t work, because 5 + 8 = 13, which is smaller than 15.
C is the only one that works, so the answer is C.
What is the factored form of the expression 9x^2- 24x + 16?
O (3x – 4)^2
O (4x + 3)^2
O (3x + 4)^2
O (4x – 3)^2
Answers
Step-by-step explanation:
Rewrite 9x2 as (3x)2
.
(3x)2+24x+16
Rewrite 16
as 42
.
(3x)2+24x+42
Check that the middle term is two times the product of the numbers being squared in the first term and third term.
24x=2⋅(3x)⋅4
Rewrite the polynomial.
(3x)2+2⋅(3x)⋅4+42
Factor using the perfect square trinomial rule a2+2ab+b2=(a+b)2
, where a=3x and b=4
.
(3x+4)2
Factorise
a² - 144
Please factorise this
Answers
Answer:
a² ÷a = a
144 ÷ 2= 12
(a - 12) (a + 12)
Answer:
[tex]\bf\pink{(a-12)\times (a+12)}[/tex]Step-by-step explanation:
Given Expression :-[tex]\bf\blue{a^{2} - 144}[/tex]Steps to factorise :-[tex]\longrightarrow\:\:\bf\red{a^{2} - 144}[/tex]
Write the number in the exponential form with an exponent of 2[tex]\longrightarrow\:\:\bf\orange{a^{2}-12^{2}}[/tex]
Using a²-b² = (a-b)(a+b), factor the expression.[tex]\longrightarrow\:\:\bf\purple{(a-12)\times (a+12)}[/tex]
(Refer the attachment for graph representation)
Graph Details :-[tex]\bigstar\:\:\bf{y=a^{2}-144}[/tex]
[tex]\rm{ Roots \:\:(-12,\:0)\:(12,\:0)}[/tex][tex]\rm{Domain \:\:a \in {\mathbb{R}}}[/tex][tex]\rm{Range \:\:y\in \bigg( -144,\:+\infty \bigg) }[/tex][tex]\rm{Minimum \:\: (0,\:-144)}[/tex][tex]\rm{Vertical\: Intercept\:\:(0,\:-144)}[/tex]Plzz help with this mayhs question
Answers
Answer:
1::5
Step-by-step explanation:
Solve the equation.
6W + 5y = 2z solve for y
Pls help!!!
Answers
Answer:
Y = 2/5z-6/5w
Step-by-step explanation:
6W + 5y = 2z
1. Subtract 6W from both sides
2. 5y = 2z-6W
3. Divide both sides by 5
4. y = 2/5z-6/5W
PLEASE HELP ME I NEED THE ANSWER ASAP THANK YOU SO MUCH!!
Answers
dark blue is the answer
Help me out guysss I’ll give u a starrrrr<3!!!
Answers
Answer:
1. 20
2. 16
3. 50
4. 0
5. 12
6. -12
7. 45
8. 99
9. 54
10. 49
You're suppose to do the opposite of each problem. So since it's division, you would multiple. (Example: x/4=2 (4 x 2=8) (x=8) (8/4=2<---- answer proven)
What is the solution for the equation 4x – 10 = 2x?
Answers
Answer:
5x
Step-by-step explanation:
subtract 4x fromboth sides
4x-10=2x
-4x -4x
divide both sides by -2
-10=-2x
-10/-2=-2x/-2
5=x
Tell me if I’m correct or incorrect
A
A
A
Dd
D
D
S
S
E
We
We
We
E
E
S
S
S
S
S
S
S
Das
S
S
S
S
S
S
S
S
S
Geometry...Please help as soon as possible please and Thank you!!!
Answers
Answer:
Step-by-step explanation:
Statment1. BD bisects ∠ABC
Reason1. Given
Statment 2. ∠ABD≅∠DBC (A)
Reason2. Definition of angle bisector
Statment 3. BD≅BD (S)
Reason3. Reflexive propriety
Statement 4. ∠BDA≅∠BDC (A)
Reason 4. Given
Statement 5 ΔABD≅ΔCDB
Reason 5. ASA theorem of congruency
question is in picture
Answers
Answer:
answer would be -6 :)
Step-by-step explanation:
Answer:
-6
To check answer multiply -5 x 6
50 points! PLEASE HELP WITH THIS! Show how you got the answers!!! WIll mark as brainliest!!! DONT ANSWER IF YOU DONT KNOW IT!!
Answers
Answer:
8. 9.1
9. 12.2
Step-by-step explanation:
8. let x represent the missing side:
Using pythagoras theorem;
13.3² = x² + 9.7²
x² = 13.3² - 9.7²
x² = 82.8 taking the square root of both sides;
x = 9.1
9. let y represent the missing side:
Using pythagoras theorem;
y² = 10² + 7²
y² = 149 taking the square root of both sides;
y = 12.2
Please answer correctly !!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!
Answers
Answer:
42
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
The answer is 9 I'm pretty sure
PLEASE HELP. SOON. I really need help i’m struggling a lot lol
Answers
Answer: A
Step-by-step explanation: trust me bro
Help plzzzzzzzzzzzzzz
Answers
Answer:
side HA and side AT
Step-by-step explanation:
What is the slope of the line through (-10,1) and (0,-4) ?
Answers
Answer:
-5/10 or -1/2
Step-by-step explanation:
A package of golf balls costs $22 and a package of golf tees costs $4. The expression $22b + $4t represents the total cost for, b, packages of golf balls and, t, packages of golf tees. Find the total cost of 2 packages of golf balls and 3 packages of golf tees
Answers
Answer: $56
Step-by-step explanation: $22(2)+$4(3) = $56