Question 1) Use the linear combination method to solve the system of equations. Explain each step of your solution. 2x - 3y = 13, x + 2y = -4. ( I'll post a picture of the question and problem incase there's any confusion). Will Mark Brainliest.
Answer:
x = 2 and y = -3
Step-by-step explanation:
The given equations are:
2x - 3y = 13 ...(1)
x + 2y = -4 ...(2)
Multiply equation (2) by 2.
2x + 4y = -8 ...(3)
Subtract equation (3) from (1).
2x - 3y-(2x + 4y) = 13-(-8)
2x-3y-2x-4y = 13+8
-7y = 21
y = -3
Put the value of y in equation (2).
x + 2(-3) = -4
x-6=-4
x = 6-4
x = 2
So, the solution of the given equations are x = 2 and y = -3.
What two numbers have a sum of 142 and a difference of 16?
Answer:
x=79,y=63 I have solve it in above picture
What is 1,000,000 written as a power with a base of 10?
Answer:
101=10 101=1
106=1,000,000 (one million) 10-5=0.00001 (one hundred thousandth)
107=10,000,000 (ten million) 10-6=0.000001 (one millionth)
108=100,000,000 (one hundred million) 10-7=0.0000001 (one ten millionth)
Step-by-step explanation:
Answer:
10^6
Step-by-step explanation:
if mia Khalifa was black what would her situation be
Answer:
i really don’t know
Step-by-step explanation:
that’s an interesting question
Answer:
i dont know but can we do rp on pad.let?
Step-by-step explanation:
what single decimal multiplier would you use to decrease by 7% followed by a 20% decrease
Answer:
x 0.27
Step-by-step explanation:
if they are both decreasing then just add the two percentages together then divide by 100 to give you your decimal answer
if the cost of a tv starts at 1 million in 1995 then jumps to 1.3 million in 1998. how much would the estimated cost be in 2021?
Answer:
3.6million
Step-by-step explanation:
See image for explanation (gotten from Chegg tutor)
Answer:
3.6 million
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/ (o) (o) \
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do 4 x + 15 + x have the same value when it's 5
Answer:
If you mean 4x = 15 + x, then yes.
Step-by-step explanation:
4 × 5 = 20
15 + 5 = 20
20 = 20
A refrigerator costs $429 to buy and its label says that estimated energy costs are $43 per year. Another brand costs $399, but its energy costs are $48 per year. If x is the years of ownership and y is the total dollars spent, write the ordered pair (x,y) that shows at what point the owner would have spent the same amount of money on either brand.
Answer:
(6, 687)
Step-by-step explanation:
If all entries of A and A^−1 are integers, prove that detA = 1 or −1.
This week Leah got a promotion at work that came with a 6 % pay increase. If now her monthly
salary is $2862, how much was she making before the raise?
Answer:
$2690.28
Step-by-step explanation:
2862 decrease 6% =
2862 × (1 - 6%) = 2862 × (1 - 0.06) = 2690.28
Answer:
2700
Step-by-step explanation:
106%-> 2862
100%->2700
ABCD is a parallelogram
M is the midpoint of CB
N is the midpoint of AB
DA = a
DC = c
a) find, in terms of a and c, the vector of MN
b) show that CA is parralel to MN
Answer:
Part a)
MN = 0.5a-0.5c
Part b)
MN=0.5a-0.5c
CA=a-c
CA is parallel to MN because 2×MN = CA.
Step-by-step explanation:
Part a = We know that ABCD is a parallelogram (stated), thus opposite sides must be equal. So given that DA = a, CB = a, DC = c, AB = C.
MN = MB+BN, so as M is the midpoint of CB then MB = 1/2 a and as we are going against AB (we are doing BN) then it will be -0.5c as N is the midpoint of AB.
Part B= More of a mathswatch error, where you have to quite literally put the precise answer. CA = CD+DA so -c (as we are going the opposite way to DC) + a.
CA = -c+a
Now CA is a multiple of MN. But Mathswatch prefers if you say that CA is parallel to MN because MN times 2 is equal to CA
In this exercise we have to use the knowledge of parallelogram and vectors to give the values of each one of them, like this:
A) MN = 0.5a-0.5c
B)CA is parallel to MN because 2×MN = CA.
First, we have to remember the definition of parallelogram:
A polygon is any flat closed shape made of straight line segments. A parallelogram is a polygon with 4 sides in which sides that don't touch each other are parallel.A) We know that ABCD is a parallelogram, thus opposite sides must be equal. So given that:
[tex]DA = a,\\CB = a, \\DC = c, \\AB = C.[/tex]
[tex]MN = MB+BN\\MB = 1/2\\BN=-0.5c\\MN = 0.5a-0.5c[/tex]
B)Where you have to quite literally put the precise answer, so we have that:
[tex]CA = CD+DA \\CD=-c\\DA=a\\CA = -c+a\\[/tex]
See more about parallelogram at brainly.com/question/555467
10)
Which set of numbers is NOT in the solution set of the inequality x > 17?
A
(14, 15, 18, 25, 29)
B)
(18.21, 25, 27, 33)
D
(29.32, 35.40.55)
Answer:
a
Step-by-step explanation:
numbers all have to be greater than 17. 14 and 15 are both less than
Sarah read 215 pages of her book during the first week of vacation. During the second week she read62 more pages then the first week
Answer:
She read 277 pages during the second week.
Step-by-step explanation:
215 + 62.
Answer: she read 277 books
Step-by-step explanation:
If x=5 then what is 3x+(2-4x). P.S. standard form
Answer:
-3
Step-by-step explanation:
3x+(2-4x)
3*5+(2-4*5)
3*5+(2-20)
3*5+(-18)
3*5-18
15-18
-3
−1/5(x−4)=−2
Solve for x
the answer would be x = 14
What percentage is 20 of 92?
Answer:
21.72% is correct answer
Answer:
18.4
Step-by-step explanation:
1) (35 + 17) + 43 = 35+ (17 + 43)
Answer:
95?
Step-by-step explanation:
Name the quadrant in which lies.
tan(theta)<0 , csc(theta)<0
The angle (theta) lies in which quadrant?
Answer:
Quadrant III (Quadrant Three)
Multiply.
(2x + 4)(2x-4)
A. 4x2 + 16
B. 4x2 - 16
C. 4x2 + 16x-16
D. 4x2 - 16x-16
Answer:
B 4x^2-16
Step-by-step explanation:
The answer is 4x^2-16
Answer:
4x^2-16
hope it's helpful ❤❤❤❤
THANK YOU.
Which one of the points A(5.2). B(6,-3) and C(4.7) is the mid-point of the other two? Check your answer by calculating two distances.
Answer:
A is the midpoint
Step-by-step explanation:
Given
A(5.2) B(6,-3) and C(4.7)
Required
Which is the midpoint
Midpoint is calculated using:
[tex](x,y) = \frac{1}{2}(x_1+x_2,y_1+y_2)[/tex]
Testing A as the midpoint, we have:
[tex](5,2) = \frac{1}{2}(6+4,-3+7)[/tex]
[tex](5,2) = \frac{1}{2}(10,4)[/tex]
[tex](5,2) = (\frac{1}{2}*10,\frac{1}{2}*4)[/tex]
[tex](5,2) = (5,2)[/tex]
The above equation is true. Hence, A is the midpoint of B and C
I need help with this please help me :(
Answer:
6 additional toppings
Step-by-step explanation:
14+1.75= 15.75
15.75+1.75=17.5
17.5+1.75=19.25
19.25+1.75=21
21+1.75=22.75
22.75+1.75=24.5
Find x. (The picture has the info)
Answer:
X=5
Step-by-step explanation:
3x+9 is twice of 12 (24). 24-9=15, and 3*5=15, so x=5.
Geometry Will give Brainlist
Given :
segment AE and segment BD bisect each otherWhich means :
∠BCA and ∠DCE are equal because they are vertically opposite angles. Segment AC = segment CE because the bisector BD divides the segment AE into two equal parts which are segment AC and segment CE.segment BC and segment CD will be equal because bisector AE divides the segment BD into two equal parts which are segment BC and segment CD.Since two sides and one included angle is equal △ACB≅△ECD under the SAS congruence criterion .
Convert 96 ounces to pounds.
6 lb.
O4 lb.
10 lb.
5 lb
PLS HELP
Answer:
6 lb
Step-by-step explanation:
i took math lol
PS. plzzzz tell me if u got it right
Answer:
6 lb
Step-by-step explanation:
there are 16 ounces in one pound
96/16 = 6 lb
Have a nice day
What is the degree of the monomial?
Only write the numerical value as your answer.
8x^3
Responder:
1
Explicación paso a paso:
cuando una variable no tiene exponente, el grado siempre es uno. Ej: 8x es lo mismo que 8x elevado a 1
What is the first step in solving the equation 9m - 2 = 16?
Add 2 to each side.
Subtract 2 from each side.
Divide each side by 9.
Multiply each side by 9.
Answer: Add 2 to each side
Step-by-step explanation:
9m-2=16
+2 +2
9m=18
What is the value of n when n = -4?
Answer:
what the whole question
what is the answer to this subtraction problem
Answer:
i d k
Step-by-step explanation:
what is f?
Given a point translated from A(1,2) to B(4,4). If a point C at (0,0) is translated in the same way, what will be its new endpoints?
A.(−3,−2)
B.(3,2)
C.(2,2)
D.(3,3)
Answer:
B.(3,2)
Step-by-step explanation:
Point translated from A(1,2) to B(4,4).
This means that for x, we add 3 units(4 - 1 = 3), while for y, we add two units(4 - 2 = 2).
If a point C at (0,0) is translated in the same way, what will be its new endpoints?
0 + 3 = 3
0 + 2 = 2
So
B.(3,2)
what is 190 × 180=7?
Answer:
34200 is not 7
false
Step-by-step explanation: