Answers
Answer:
A. x=5,y=6
Step-by-step explanation:
Add y to both sides of the equation.
x=−1+y
x−3y=−13
Replace all occurrences of x with −1+y in each equation.
−1−2y=−13
x=−1+y
Solve for y in the first equation.
y=6
x=−1+y
Replace all occurrences of y with 6 in each equation.
x=5
y=6
The solution to the system is the complete set of ordered pairs that are valid solutions.
(5,6)
The result can be shown in multiple forms. Equation Form: x=5,y=6
Related Questions
Martha has two jobs. One pays $15 per hour, and she works at that job 10 hours per week. The other job pays $13 per hour, and she works at that job 30 hours per week. How much money does she make per year?
Answers
Answer:
540$
Step-by-step explanation:
Please Help!!!!!! You have twice as many nickels as pennies. you have $1.10. How many of each coin do you have? Solve each problem using a system of equations...
Answers
Use the distributive property to write an expression that is equivalent to 10(10x - 4).
Answers
Answer:
100x-40
Step-by-step explanation:
10*10x and 10* -4
somebody please help im giving 20 points and a brainliest !
Answers
Answer:
Price today= 3078
Price 10 years from today= 3877.88
Step-by-step explanation:
Price today= 3000 (1.026)= 3078
Price 10 years from today= 3000 (1.026)^10= 3877.88
please help me! this is hard
Answers
Answer: 1430 girls
Step-by-step explanation:
In order to solve this we must take it step by step. So first things first. There are 12,481 people at this concert. If 8906 are adults we need to subtract to find out how many children there are. 12481-8906=3575. There are 3,575 children at this concert. Now if 3/5 of the children are boys then the other missing 2/5 must be the girls. There are a couple of ways to solve this but im going to go the direct route. multiply 3/5 by 3,575 to get 2,145 boys. Now if 2,145 out of 3,575 are boys then 3575-2145= 1430 girls
Let's sum up what we learned
1. 12,481 people are at a concert
2. 8906 adults are at this concert
3. 3,575 are children
4. 2145 are boys
5. Which means there are 1430 girls
A rectangle has an area of 12x²+17x-5mm². For what value of x is the rectangle a square? What is the area of a square? Justify your answer and show your work. A=12x²+17x-5mm²
Answers
Answer:
23mm
528 mm^2
Step-by-step explanation:
The area of a rectangle is given as the product of its length and width.
Given that 12x²+17x-5mm² is the area
factorize
12x²+17x-5 = 12x²+20x -3x-5
= 4x(3x+5)-1(3x+5)
= (3x+5)(4x-1)
For the rectangle to be a square, it means that the sides 3x+ 5 and 4x - 1 are equal. Hence
3x + 5 = 4x -1
collect like terms
3x - 4x = -5 -1
-x = -6
x = 6
substitute into the sides
3x + 5 = 3(6) + 5 = 23
4x -1 = 4(6) - 1 = 23
The area of the square which is a product of the sides
= 23 * 23
= 529
The volume is ___ cubic centimeters.
Answers
Answer:
4.24
Step-by-step explanation:
The average length of a female dolphin is about 179 inches What is the length in feet and inches pleaseee help me I have been stuck on this questions for about 20 mins !
Answers
PLEASE HELP:). The branch of an isosceles triangle is 2.5 times longer than the base and the circumference of the triangle is 60 cm. Find the lengths of the midpoints of the triangle.
Answers
Answer:
Step-by-step explanation:
2.5x + 2.5x + x = 60
x= 10
2.5x = 25
the sides of the triangle are 25, 25, 10
I don't know what you mean by "midpoints of the triangle".
Please help me with the questions please ASAP
Answers
Answer:
x = 20
Step-by-step explanation:
You can solve this problem using similar triangles; you know the triangles are similar due to the AAA property because of the Corresponding Angles Theorem.
To find x, you need to identify what sides 8 and x correspond to:
8 corresponds to 14 (6 + 8)
x corresponds to (x + 15)
Now, you need to find the scale factor by dividing 14 by 8:
14 ÷ 8 = 7/4
At this point, you can write and solve an equation for x:
7/4x = x + 15
3/4x = 15 (subtract x from both sides)
x = 20 (multiply both sides by 3/4)
Please help will give brainliest
Answers
36.Find the following using suitable identities.
a) (7a – 4b) (7a + 4b)
b) 501 x 502
Would appreciate if you send a pic of the solutions<3
Answers
Answer:
1) [tex]49 {a}^{2} - 16 {b}^{2} [/tex]
2) [tex]251502[/tex]
Step-by-step explanation:
a) Question :-[tex](7a - 4b)(7a + 4b)[/tex]
Identity used here :-[tex](a + b)(a - b) = {a}^{2} - {b}^{2} [/tex]
So,
[tex](7a + 4b)(7a - 4b)[/tex]
[tex]=> {(7a)}^{2} - {(4b)}^{2} [/tex]
[tex]=> 49 {a}^{2} - 16 {b}^{2} [/tex]
b) Question :- [tex]501 \times 502[/tex]
Identity used here :-[tex](x + a)(x + b) = {x}^{2} + (a + b)x + ab[/tex]
So,
[tex]501 \times 502 = (500 + 1)(500 + 2)[/tex]
[tex] = > {(500)}^{2} + (1 + 2)500 + 1 \times 2[/tex]
[tex] = > 250000 + 1500 + 2[/tex]
[tex] = > 251502[/tex]
In the 7th grade, 165 students ride the bus to school. If there are 250 students in 7th grade, what percent rides the bus? Please explain too
Answers
Answer:
66 Percent of students rides the bus to school, which is approx 1/3 lol
Step-by-step explanation:
Have a nice day
A gardener has 100 feet of fencing in order to enclose a rectangular garden. The equation A(x)=x(50−x) gives the area of the garden whose width is x feet. What is a reasonable domain for this function? Explain.
Answers
Answer:
the answer is a
Step-by-step explanation:
A reasonable domain would be
−∞<x<∞
because
A(x)
is defined for all real numbers.
What is 308 kg shared in the ratio 1 : 2 : 5?
Answers
Answer:
It will became like this.
38.5kg.77.kg192.5.kgHope this will help you.
Answer:
38.5, 77, 192.5
Step-by-step explanation:
x + 2x + 5x = 308
8x = 308
x = 38.5
38.5 + 2(38.5) + 5(38.5)
38.5 + 77 + 192.5 = 208
38.5, 77, 192.5
Justine earned $19,000 during the first year of her job at city hall. After each year, she received a 8.6% raise. Find her total earnings throughout her 20-year career.
Answers
Answer:
929,477.13
Step-by-step explanation:
Number of years, n = 20
Using the relation :
a(1- r^n)/ (1 - r) ;
where a is the first term, r is the common ratio and n is the number of years
a = 19000
r = 1 + 8.6% = 1.086
19000(1 - 1. 086^20) / (1 - 1.086)
19000(1 - 1.086^20) / (1 - 1.086)
−79935.0336930 / (1 - 1.086)
= 929,477.13
Someone please help me its urgent
What is the equation of the directrix
Answers
Answer:
Step-by-step explanation:
y=-1
pasar 125.85 metros a gigametros
Answers
Answer:
125.85 meter in gigameter = 1.2585 x 10⁻⁷
Step-by-step explanation:
Given:
125.85 meter
Find:
125.85 meter in gigameter
Computation:
1 Gm = 1,000,000,000 m
125.85 meter in gigameter = 125.85 x 10⁻⁹
125.85 meter in gigameter = 1.2585 x 10⁻⁷
i will mark brainiest if you explain please
Answers
Answer:
c,or d I think please be right
what is this equal to
[tex] \frac{a + 8}{2} = \frac{a - 4}{8} [/tex]
Answers
Area of composite shapes!!
Find the area
Its geometry
Due Tomorrow
Plz HURRY
Offering brainliest
Answers
Hope its correct!
can sb please tell me the answer
Answers
Answer:
136 hope this helps!
A student has four sticks of wood that measures 3inches 4 inches 5 inches and 6 inches can the student make a right triangle why or why not?
PLEASE HELP ME I need help and no body is answering and it sucks !! PLEASE ANSWER ⚠️⚠️
Answers
Answer:
Yes, the student can use three of these sticks to make a right triangle.
Step-by-step explanation:
The measure of four sticks = 3 inches, 4 inches, 5 inches and 6 inches.
What is the equation of the line through the origin and (3, 4)?
A. y = 3x
B. y = fx
C. y= 4x
D. y = 2
SUB
Answers
Answer:
a
Step-by-step explanation:
if 3and 4 origin it a would be your answer
The elves can make 200 toys per day at the north pole. How many days will it take to make 5,800 toys?
Answers
Answer:
29 days.
Step-by-step explanation:
200 • 29 = 5800
Hope this helps
Answer:
29
Step-by-step explanation:
5,800 ÷ 200 = 29
Three bags of chips and sodas cost $12.50. Four bags of chips and two sodas cost $10.00. What is the cost of each item? ASAP pls!
Answers
Step-by-step explanation:
3c + 3s = 12.50
4c + 2s = 10.00
3S = 12.50-3c
s = 4.17 - c
4c + 2 (4.17-c) = 10.00
2c + 8.34 = 10.00
2c = 1.66
chips = 0.83
soda = 3.34
On the number line, which point is closest to
A. A
B. B
C. C
D. D
Answers
Hope that helps :)
Answer:
the answer is ç
Step-by-step explanation:
because π=3.14
betty bucket has 49000 clovers and Clover has 569000 clover how many do they have in all?
can some people be my friend
Answers
Answer:
618000
Step-by-step explanation:
just add
please help! solve for the value of y
Answers
Answer:
26
Step-by-step explanation:
5y-3+2y+1=180
7y-2=180
7y=182
y=26
Find the measure of the arc.
A
146°
E
B
MABC = [ ? 1°
Answers
Answer:
i get mABC = 270°
Step-by-step explanation:
This is fairly straight forward once you the right angle symbol for the arc AC. Also realizing the 148° for mAB is not needed for this question. The 148° for mAB would be useful if you wanted to calculate arc mBC.
Remember there are 360° in a circle.
The arc mAC is 90°
The arc mABC is the rest of the circle. is the arc from A to B to C
arc ABC + arc AC is the full circle 360°
mABC + mAC = 360° mAC = 90°
mABC + 90° = 360° - 90° from both sides
mABC = 360° - 90°
mABC = 270°
The angle ∠ABC in the given circle will be 270°.
What is an angle?
An angle is a geometry in plane geometry that is created by 2 rays or lines that have an identical terminus.
Angle is very useful to measure any angular rotational motion for example if you have to find out the rotation among the circle then it cannot measure in length parameter such that meter inch so it will be measured as an angle in a unit of degree or radian.
In another word, the angle is the measurement of the angular distance for example for linear motion we have a meter inch but for angular rotation, we don't have the measurement so the angle is useful to measure the angular rotation.
Now since we know that the angle of complete rotation is 360°.
Now ∠ADC + ∠ABC = 360
Given that ∠ADC = 90°
∠ABC = 360° - 90° = 270°
Hence, 270° will be the correct answer.
For more about the angle
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