2) Solve this system of linear equations by elimination.
2x+4y=-4
3x=-5y-3
*x=5,y=-2
*x=4,y=-3
*x=-5,y=2
*x=4,y=3
please answer step by step
Answer: x=4 and y=-3
Step-by-step explanation:
To use elimination to solve system of equations, you want to make sure the equations are first in standard form.
2x+4y=-4
3x+5y=-3
We want to make sure either the x or the y are equal so we can eliminate them. Let's eliminate x.
2x+4y=-4 [multiply equation by 3]
3x+5y=-3 [multiply equation by 2]
6x+12y=-12
6x+10y=-6
We can now subtract the equations.
2y=-6 [divide both sides by 2]
y=-3
Now that we know y=-3, we can plug it into an equation to solve for x.
2x+4y=-4 [plug in y=-3]
2x+4(-3)=-4 [multiply]
2x-12=-4 [add both sides by 12]
2x=8 [divide both sides by 2]
x=4
The final answer is x=4 and y=-3.
helpppppppppp plz its no 8t^6
Answer:
u tried -8t^6???
Step-by-step explanation:
because -*+= -
Answer: -8t^6
Step-by-step explanation:
You just have to multiply the 2 and -4 which would give you -8. Then add the two exponents and you would get a 6.
A metallurgist wants to make 130 grams of an alloy that is to be 20% copper. She has samples that are 14% copper and 22% copper. How many grams of the sample that contains 14% should she use?
Answer:
She should use 32.5 g of the sample that contains 14%
Step-by-step explanation:
Here, we want to know the number of grams of the sample that contains 14% copper that should be used
let the number of grams that contains 14% copper to be used be x
Then the number of grams of 22% will be 130-x
Thus, mathematically;
0.14(x) + 0.22(130-x) = 0.2(130)
0.14x + 28.6 - 0.22x = 26
0.22x - 0.14x = 28.6 - 26
0.08x = 2.6
x = 26/0.08
x = 32.5
Rich and Betsy Cuik started a small business. They manufacture a microwavable coffee-to-go cup called Cuik Cuppa Coffee. It contains spring water and ground coffee beans in a tea-bag-like pouch. Each cup costs the company $1.00 to manufacture. The fixed costs for this product line are $1,500. Rich and Betsy have determined the demand function to be q = -1,000p + 8,500, where p is the price for each cup.
Write the expense equation in terms of the demand, q.
Express the expense equation found in part (a) in terms of the price, p.
Answer: E= 1.00q + 1,500
Step-by-step explanation:
Solve the simultaneous equations 5+2y=11 -5x+4y=13 pleas help
Answer:
x=5 y=-2.
Step-by-step explanation:
GEOMETRY
Can someone explain dilations to me?
Kathy deposits $500 into an investment account with an annual rate of 1.5%, compounded annually. The amount in her account can be determined by the formula A = P(1 + R)^t, where P is the amount deposited, R is the annual interest rate, and t is the number of years the money is invested. If she makes no other deposits or withdrawals, how many years, to the nearest tenth, will it take for her money to double in value?
The sum of the ages of Martin and his son Sherwin is 47 years. Martin's age is 2 years more than 4 times the
age of Sherwin. Find their present age.
Answer:
In the picture above it shows how to answer the questions step by step. If there's a mistake, pls inform me.
12. The second of three numbers is one less than the first. The third
number is 5 less than twice the second. If the third number exceeds the
first number by 12, find the three
numbers.
Answer:
The three numbers are 19, 18, and 31.
Step-by-step explanation:
The three numbers are x, y, and z.
y=x-1
z=2y-5
z=x+12
2y-5=x+12
2(x-1)-5=x+12
2x-2-5=x+12
x=19
y=18
z=31
The three numbers are 19, 18 and 31
what is Algebra?Algebra is the branch of mathematics that helps in the representation of problems or situations in the form of mathematical expressions.
let the three numbers be x, y, and z.
So, according to question
The second of three numbers is one less than the first,
y = x-1
The third number is 5 less than twice the second,
z=2y-5
also, If the third number exceeds the first number by
12z=x+12
Now, equating the equations
2y-5=x+12
2(x-1)-5=x+12
2x-2-5=x+12
x=19
So, y=18 and z=31.
Learn more about algebra here:
https://brainly.com/question/24875240
#SPJ5
If f(a)=-5, what is the value of |f(a)|?
|f(a)| , the vertical lines mean absolute value. Absolute value is the positive value of the answer whether it is actually negative or positive.
F(a) is given as -5, so the absolute answer would be 5
The answer is 5
M-1 = -2
—
9
Plsss helppp!!
Answer:
m=-9
Step-by-step explanation:
please give me an answer for this
200,000 x 300,000
Answer:
60,000,000,000
Step-by-step explanation:
what’s equivalent to the equation 5x+30=45 PLEASE HELP ME
Answer:
x+6=9
Step-by-step explanation:
divide all by 5
Answer:
x=3
Step-by-step explanation:
Subtract 30 from both sides.
5x=15
Divide both sides by 5
x=3
Edit: Go with the other answer
Solve for the missing arc measure, angle measure, or variable.
m < BOC = _____ degrees.
Please help! I’ll give brainliest!!
Answer:
110
Step-by-step explanation:
The answer is 110 degrees. The reason is hard to put into simple language.
If the central angle and the acute angle hitting the circumference share the same end points, then the central angle is double the arc whose vertex is on the circumference.
Read that sentence a couple of times. I don't know how to make it simpler.
The arc angle and the central angle both have B and C as their end points.
The arc angle is on the circumference of the circle. The vertex (A) of BAC is on the circumference. If mine is the only answer, wait a few days before awarding a Brainliest. A thanks will do.
Answer quick please !!
Answer:
B -- give brainliest pls
Step-by-step explanation:
Find the product.
(v - 7su^2) (v + su^2)
Enter the correct answer.
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Reminder :
[tex](x + a)(x + b) = {x}^{2} + (a + b)x + (a \times b) \\ [/tex]
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[tex] {v}^{2} + ( - 7s {u}^{2} + s {u}^{2})v +( ( - 7s {u}^{2})(s {u}^{2} )) = \\ [/tex]
[tex] {v}^{2} - 6s {u}^{2} v - 7 {s}^{2} {u}^{4} \\ [/tex]
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
Answer:
v² - 6su²v - 7s²[tex]u^{4}[/tex]
Step-by-step explanation:
Each term in the second factor is multiplied by each term in the first factor, that is
= v(v + su²) - 7su²(v + su²) ← distribute both parenthesis
= v² + su²v - 7su²v - 7s²[tex]u^{4}[/tex] ← collect like terms
= v² - 6su²v - 7s²[tex]u^{4}[/tex]
Two rival dry cleaners both advertise their prices. Store A's prices are modeled by the expression 30x - 8, where x is the number of items brought in. Store B's prices are modeled by the expression 6(5x + 3), where x is the number of items brought in. When do the two stores charge the same rate?
Store A's prices are represented by the expression 15x - 2.
Store B's prices are represented by the expression 3(5x + 7).
To find when the 2 stores charge the same rate , we set the expression equal and solve for x
15x - 2 = 3(5x+7)
15x -2 = 15x + 21
Subtract 15x on both sides
-2 = 21
We cannot solve for x
So , the price of two stores never be same
Two stores never charge the same rate
Will give brainlist i really need help!!
Answer:
40 units^2
Step-by-step explanation:
The area of the triangle is
A = 1/2 bh
A = 1/2 ( 8 * 10)
= 1/2 (80)
= 40 units^2
Step-by-step explanation:
a=1/2*b*h
a=1/2*8*10
a=40
Which of the following shows 4.819 correctly rounded to the tenths place?
Answer:
Step-by-step explanation:
Which of the following shows 4.819 correctly rounded to the tenths place
put the smaller number in the end 1.489 i hope this helps
divide in simplest form
13÷10 5/6
7/8÷3 1/16
how many 1 3/5 inch books can fit on a
14 1/2 inch long book self
Answer:
13÷10 5/6
7/8÷3 1/16
how many 1 3/5 inch books can fit on a
14 1/2 inch long book self
Step-by-step explanation:
anyone know this , please help
Answer:
The original fee is $40 before you add any miles.
Step-by-step explanation:
When the miles are at 0 the fee is already at $40.
Answer:
I believe it is D
Step-by-step explanation:
I'm bad at y intercepts so I'm SO sorry if I am incorrect
Make 4 baskets in 1/2 hour. How many baskets can Nikki make in 5 hours
Answer:
40
Step-by-step explanation:
5*4*2 because she does 4 baskets in 1/2 hour not 1
sweet t is making a double batch of Pupcakes. he puts them in the oven at 6:50. they need to bake for 25 minutes
i would love to help but i just need free points
Step-by-step explanation:
Which of the following ratios is equivalent to the
ratio of 24 to 42 ?
A. 1 to 1
B. 1 to 2
C. 1 to 4
D. 1 to 8
E. 1 to 16
write the equation for the graph
[tex]y=|x+1|+2[/tex]
also that's a huge blank.
I dont know how to write the question or answers
Answer:
i think i think its B
Step-by-step explanation:
The temperature at 2 am was -12 degrees. At noon the temperature had risen 16 degrees. At 4 pm the temp dropped 8 degrees. What was the temperature at 4 pm
Answer: - 4
because The temperature at 2 am was -12 degrees and At noon the temperature had risen 16 degrees
=> the temperature at noon was -12 + 16 = 4 (degrees)
At 4 pm the temp dropped 8 degrees => the temperature at 4 pm was:
4 - 8 = -4 (degrees)
Step-by-step explanation:
7
77 watermelons cost
$
8.96
$8.96dollar sign, 8, point, 96.
Which equation would help determine the cost of
5
55 watermelons?
Answer:
A
Step-by-step explanation:
7=8.96
5=??
(5×8.96)÷7= 6.4
which is shown by A
Please answer quickly I'm failing and need help!
Answer:
Blue=slope of 1
Yellow=slope of 2
Black=slope of 1/5
Please help me answer this question
Answer:
71 degrees
Step-by-step explanation:
All angles in a triangle must add up to 180 degrees. If we take that total 180 and subtract 38, we get 142 degrees. If we divide that by two, because the angles are the same, we get 71 degrees. Therefore x=71
