If 6x+3y=−1 and
5x+y=8 are true equations, what would be the value of
−x−2y?
Answers
Answer: 9
x = 2.778
y = -5.889
-x -2y
= -2.778 - 2(-5.889)
= 9
Related Questions
What is the value of the expression below when
y=9 and z=3?
10y−7z
Answers
10y−7z
Plug in the numbers for y and z.
(10)(9)−(7)(3)
= 69
Answer:
69
Step-by-step explanation:
10y-7z
Plug in y and z
10(9)-7(3)
Solve using order of operations
90-21=69
Thanks to anyone who helps!
Answers
Answer:
Step-by-step explanation:
Look at the determinant.
a = k
b = 1
c = k
sqrt(b^2 - 4*k*k)
sqrt(1 - 4k^2)
The only way this can work out to repeated solutions is if k = +/- 1/2
That way 1 - 4(1/2)^2 = 0 or 1 - 4*(-1/2)^2 = 0
That way both solutions will be
-b / 2a
-1 / 2/(1/2) = - 1
or
-1 / 2(-1/2) = 1
So the answer is k = 1/2, - 1/2
At what rate will a snail travel if it moves 30 cm in 5 seconds
Answers
Answer:
6cm per second
Step-by-step explanation:
30 divided by 5 is 6
Answer:
hourly ot minute
Step-by-step explanation:
rrrrrrrrrffttt
help plssss I will do anythinv
Answers
Question 1. If the perimeter of Rectangle ABCD is 34y+2. What is the width?
Question 2. What is the area of Rectangle ABCD in terms of y?
Question 3. If the perimeter of the rectangle is 70. What is it’s area?
Question 4. What are the length and width of the rectangle?
Answers
Answer:
Question 1. If the perimeter of Rectangle ABCD is 34y+2. What is the width?
Question 2. What is the area of Rectangle ABCD in terms of y?
Question 3. If the perimeter of the rectangle is 70. What is it’s area?
Question 4. What are the length and width of the rectangle?
Estimate each sale price for each item.$8.60 and $40.60
Answers
Answer:
is that even the full answer because I don't know if that is
10. If the triangle has a perimeter
of 33 inches and has sides
measuring x + 2, X-6, and 2x + 1,
find the value of x.
Answers
Richard learned a total of 30 appetizer recipes over the course of 6 weeks of culinary school. After 7 weeks of culinary school, how many total appetizer recipes will Richard know? Assume the relationship is directly proportional.
Answers
He learns 5 recipes a weeks so 7x5=35
Richard will know 35 recipes in all
3 3/8 divided by 4 1/2?
Answers
Answer:
0.75
Step-by-step explanation:
Hope this helps
Answer:
3/4
Step-by-step explanation:
3 3/8 divided by 4 1/2
Turn into improper fraction
27/8 ÷ 9/2
Cross multiply
27/8 × 2/9
you can simply to
3/4×1/1= 3/4
Help me please BRAINLIEST In the drawing below, ABC is similar to NPM. Which ratio correctly represents the relationship between the lengths of the sides of the triangles?
a, b, c, or d please help me thank you
Answers
Answer: A
Step-by-step explanation:
A library has been given a specific amount of money and can buy 350 hardback books costing
£15.75 each
a How many books costing £10.50 could be bought instead?
b What type of proportion does this represent
Answers
Answer:
525 books
Step-by-step explanation:
Total books = 350
Cost of each book = £15.75
Total cost = 350 × £15.75
= £5,512.5
a. How many books costing £10.50 could be bought instead?
Instead of using £5,512.5 to buy 350 books at £15.75 each,
Number of books = total cost / cost per book
= £5,512.5 / £10.50
= 525 books
£5,512.5 can be used to buy 525 books at £10.50 each
The proportion is a direct proportion
Amanda buys 2 1/2 pounds of lemons. The Lemons were $2.00 per pound. How much did Amanda spend on lemons (give an explanation on what you did and how your approach was accurate)
Answers
Answer:
1.25
Step-by-step explanation:
if you divided it and then simplified you would have your answer
Do you know the answer? LA = GY - D
Answers
Answer:
G = LA/Y + D/Y
Isolate the variable by dividing each side by factors that don't contain the variable.
Hoped this helped!
2.) Add unlike fractions using the butterfly method.
1 point
c) of the teacups in Lily's Tea Shop, 1/5 are teal and another 1/10 are yellow. What fraction
of the teacups are either teal or yellow?
3/10
5/10
7/10
O 1/10
Answers
Answer:
3/10
Step-by-step explanation:
1/5=2/10
2/10+1/10=3/10
Answer:
ITS 3/10 AND CAN SOMEONE PLS ANSWER MY MOST RECENT QUESTION.
URGENT!
need help
...
Answers
Answer:
92°
Step-by-step explanation:
If ΔABC ≈ ΔPQR then ∡A = ∡P
∡P is 92° so ∡A is 92°
Answer:
92 degrees
Step-by-step explanation:
What is an
equation of the line that passes through the points (-6,5) and (6, 7)?
Answers
Answer:
Y= -x - 1
Step-by-step explanation:
das it :->
(Please help)Choose the correct answer and please explanation each (Brainliest)
1.let x be the number of boys and y, the number of girls in a camp. the number of girls exceeds twice the number of boys by 12. This relation is given by which of the following equation?
A. x=2y+12
B. y=12–2x
C. y=12+2x
D. y=2(12–x)
2.Which of the following ordered pairs is a point in the region described by the inequality y>x?
A. (-1, -2)
B. (1,0)
C. (3,2)
D. (4,8)
3.Which of the following ordered pairs does NOT satisfy the inequality x+y<5?
A. (-1,-4)
B. (0,4)
C. (1,7)
D. (2,2)
Answers
Answer:
1. C
2. D
3. C
Explanation:
1. Girls = 12 plus twice the number of boys, so C. y = 12 + 2x.
2. You have to see which point has the second value being greater than the first value:
A) -1 > -2 is not true
B) 0 > 1 is not true
C) 2 > 3 is not true
D) 8 > 4 is true, so it's D
3. Add the two values and see if it's less than 5
A) -1-4 < 5 is true
B) 0 + 4 < 5 is true
C) 1 + 7 < 5 is not true, so this is the answer
D) 2 + 2 < 5 is true
Evaluate the function. g(x) = 3x^2 – 2x + 5 Find f(2)
Answers
Answer:
13
Step-by-step explanation:
Replace X with 2
Evaluate the function. g(x) = 3x^2 – 2x + 5 Find f(2)
g(x) = 3(2)^2 – 2(2) + 5
Next conduct PEMDAS
Exponents are first so solve 2^2 which is 2 x 2 = 4
g(x) = 3(4) – 2(2) + 5
Next step is multiplication multiply 3 x 4 and 2x2
g(x) = 12 – 4 + 5
conduct adding and subtracting left from right
g(x) = 13
Distribute: -1/2(10b + 18)
please i need this before 8:00pm
Answers
Answer:
-5b - 9
Step-by-step explanation:
-1/2 (10b) = -5b
-1/2 (18) = -9
Kevin pays $12.95 for a text messaging service plus $0.07 for each text message he sends. Which of the following equations could be used to represent the total cost, y, when x represents the number of text messages sent?
Answers
Answer:
y=0.07x + 12.95
Step-by-step explanation:
What’s the answer laaalalalalalaaaaaa
Answers
Answer: The slope is -1/2, the y-intercept is 4, and the equation is y=-1/2x+4
Step-by-step explanation:
The only coins that Kyle has are dimes and quarters. He has a total of 30 coins. The total value of Kyles coins is $4.80. Which of the following systems of equations can be used to find the number of dimes, d, and the number of quarters, q, kyle has?
Answers
Try 12 quarters = $3
Try 18 dimes = $1.80
30 coins check
$4.80 check
PLZ mark brainiest
The rectangular top of Tonya's kitchen table has a length of 72 Inches and a width of 28 inches. What is the area of the top of Tonya's table in square inches?
FO720 square inches
G.O 200 square inches
H. 2,016 square inches
J. O 100 square inches
Answers
Answer:
2016 square inches
Step-by-step explanation:
Area is length x width. Length is 28. Width is 72. 28 x 72 = 2016
The population of the United States in 1990 was 85,455,930 in 2003 it was 104,538,348 what was the percent change
Answers
Answer:
22.33%
Step-by-step explanation:
In the last 40 days, Mr. Neptune's newspaper has been delivered late 6 times. What is the experimental probability that it will be delivered late tomorrow?
Answers
Answer:
15%
Step-by-step explanation:
The reason for this is simply because if you take 40 and 6, turn it into a fraction, then turn it into a percentage, it turns out to be 15%
Each of a company's 546 employees earns $790 each week. What is the total
amount the company pays all its employees for 4 weeks?
Answers
Answer:
$1,725,360
Step-by-step explanation:
For this, you would just multiply every number: [tex]employees×weekly salary×weeks[/tex] which is [tex]546×790×4=1,725,360[/tex].
Answer:
I think all u need to do is mulitply thoses numbers just use calulator
Step-by-step explanation:
hope it helped
Help I’m so close and I really wanna sleep ;-;
Answers
Answer:
8
Step-by-step explanation:
Preety Sure is 8
Answer:
8
Step-by-step explanation:
Since it starts from 6, count by +1 till you get at the blue dot
How many times does 3/4 go into 1 1/2
Answers
Answer:
2
Step-by-step explanation:
In order to divide these fractions, you must turn the mixed number into a fraction like below:
1 1/2 = (2 x 1 + 1) / 2 = 3/2
In order to divide fractions, you must multiply by the reciprocal of the denominator. In this case, you are dividing (3/2) / (3/4) and 3/4 is the denominator.
3/2 * 4/3 = 12/6 = 2. Your answer is 2.
Please help don’t know answer
Answers
Answer: y= X+3
Step-by-step explanation:
slope intercept form is y=mx+b where m is the slope and b is the y- intercept
(with steps please)
Your next Pre-Algebra test is worth 93 points and contains 38 multiple choice and short answer problems. Each
multiple choice problem is worth two points and each short answer is worth three points. How many of each type of
problem is on the test?
Answers
Answer:
21 of multiple choice and 17 of short answer questionsStep-by-step explanation:
Multiple choice = mShort answer = sEquations:
m + s = 382m + 3s = 93Solve for s by eliminating m. Subtract the double of the first equation from the second one:
2m + 3s - 2(m + s) = 93 - 2(38)3s - 2s = 93 - 76s = 17Find the value of m:
m = 38 - 17 = 21