Answer:
21
Step-by-step explanation:
9-(-12) = 9+12 = 21 ( product of two minus signs is plus)
Answer:
11
Step-by-step explanation:
Okay so this used to confuse me when I was younger but It's actually pretty simple, just imagine the subtraction sign, the parentheses, and the negative sign in front of the two turns into a plus sign. It's basically addition with more steps so instead of seeing this - ( - you can see this +. I hope this helps.
A farmer's market sells pecans, walnuts, and cashews. They each have a
different cost and are priced per pound. Alyssa buys three pounds of walnuts
and four pounds of cashews and spends $32. Landon buys seven pounds of
pecans and five pounds of walnuts and spends $65. Tina buys 3 pounds of
pecans and 2 pounds of cashews and spends $22. Find the missing quantity
below.
D
Price per pound for Pecans = $
Answer:
Price per pound for Pecans = $5
Step-by-step explanation:
Let price per pound of walnut be x, price per pound of pecans be y and price per pound of cashew be z.
Thus;
For alyssa;
3x + 4z = 32 - - - (eq 1)
For Landon:
5x + 7y = 65 - - - (eq 2)
For Tina;
3y + 2z = 22 - - -(eq 3)
From eq 3, let's make z the subject;
z = (22 - 3y)/2
Putting this for z in eq 1 gives;
3x + 4((22 - 3y)/2) = 32
3x + 2(22 - 3y) = 32
3x + 44 - 6y = 32
3x - 6y = -12
Divide through by 3 to get;
x - 2y = -4 - - - eq(4)
Multiply through by -5 to give;
-5x + 10y = 20
Add this to eq 2 to get:
5x - 5x + 7y + 10y = 65 + 20
17y = 85
y = 85/17
y = 5
Thus, Price per pound for Pecans = $5
brainliest will be awarded
please help put the solution only if you can. Thank you!
Answer:
X=32 and Y=51
Step-by-step explanation:
first to find the answer, we must establish that the sum of 3 angles in any triangle will equal 180 degrees, and both triangles are congruent then we can start making equations. Triangle STU has 2 numbers and one equation on it, the equation for the length of NP will give us y, but first we must get X from the equation for angle TUS which is congruent to angle MNP, so first we must add angle M and angle P together to find angle N, 142+24=166, 180-166=14, so angle N and angle U are both equal to 14 degrees, so, 2x-50=14 first add 50 to both sides then divide by 2 giving us 32=X. Now that we have x, we can find y, 2x32-y=13, we can determine m is equal to 13 m because segment SU is congruent to segment NP, SU is 13 meters, thus NP is 13 meters long as well. first multiply 32 and 2 giving 64, then subtract 64 from both sides, giving you -y=-51, but we don't stop here because y itself can't be negative as that's not what's being asked for, so divide both sides by negative 1 giving you Y=51
Originally, Juan borrowed $10, but his mother loaned him $3 more, so he borrowed a total of $13. He sells $25 worth of lemonade in his first week. After Juan pays his mother back the $13 he borrowed, his profit is $12.
If Juan’s mother forgave (or took away) his debt of –13, what equation shows the amount of money Juan will have?
Answer:
25
Step-by-step explanation:
If Juan's mother forgave his debt of -$13, then Juan will have $25 left after paying back his initial loan and making a profit of $12.
Juan's money = $12 + $13
What is an equation?Two algebraic expressions having the same value and symbol '=' in between are called an equation.
If Juan's mother forgave his debt of -$13, then it means that Juan received $13 from his mother instead of owing her $13. So the equation that shows the amount of money Juan will have is:
Juan's profit = Juan's earnings - Juan's expenses
Juan's profit = $25 - $13
Juan's profit = $12
This means that after paying back his loan and making a profit of $12, Juan will have no money left.
If we want to include the amount he initially borrowed, we can modify the equation as follows:
Juan's money = Juan's earnings + Juan's initial loan
Juan's money = $25 - $13 - $13
Therefore, the equation is Juan's money = $12 + $13
To learn more about the equation;
https://brainly.com/question/12788590
#SPJ7
WILL GIVE BRAINLIEST!!!
A person is shopping for cereal, oranges, and eggs at a grocery store. Which one of the following is an INPUT in this scenario? (which do you have control over?) *
A.The number of cereal boxes purchased
B.The cost per pound of oranges
C.The amount paid for eggs
Find the exact value of cos(a + b), given sin a = 2/5 for a in Quadrant || and cos B = 1/3 for b in Quadrant IV.
Answer:
Option (4)
Step-by-step explanation:
cos(a + b) = cos(a)cos(b) - sin(a)sin(b) [Identity]
Since, sin(a) = [tex]\frac{2}{5}[/tex] for a in quadrant II
Therefore, cos(a) = [tex]\sqrt{1-\text{sin}^2(a)}=\sqrt{1-(\frac{2}{5})^2}[/tex]
cos(a) = [tex]\frac{\sqrt{21}}{5}[/tex]
But cosine of a is negative quadrant II
Therefore, cos(a) = -[tex]\frac{\sqrt{21}}{5}[/tex]
And cos(b) = [tex]\frac{1}{3}[/tex] for b in quadrant IV
Therefore, sin(b) = [tex]\sqrt{1-\text{cos}^{2}b}[/tex]
= [tex]\sqrt{1-(\frac{1}{3})^2}[/tex]
= [tex]\frac{2\sqrt{2}}{3}[/tex]
But sine of an angle is negative in quadrant IV,
Therefore, sin(b) = [tex]-\frac{2\sqrt{2}}{3}[/tex]
Now substituting these values in the identity,
cos(a + b) = [tex](-\frac{\sqrt{21}}{5})(\frac{1}{3})-(\frac{2}{5})(-\frac{2\sqrt{2}}{3})[/tex]
= [tex]-\frac{\sqrt{21}}{15}+\frac{4\sqrt{2}}{15}[/tex]
= [tex]\frac{4\sqrt{2}-\sqrt{21}}{15}[/tex]
Therefore, Option (4) will be the answer.
Answer: D
Step-by-step explanation:
Edge 2021
A pair of shoes is discounted 20%. The discounted price is $34.40. What was the original price of the shoes?
Answer:
ved tiwari and komore in the u.s. department for Drawing of 6:4:1.komal in the u.s. department for the u.s. department for health
Write the equation of the line in slope-intercept form that
passes through the point (-2, 4) and is perpendicular to the line
6x + 3y = 8.
Answer:
y = 1/2x + 5
Step-by-step explanation:
I checked it on desmos
Let f (x comma y )equals 4 x squared minus 9 x y plus 6 y cubed. Find f subscript x (x comma y ).
Answer:
Fx(x,y) = 8x -9y
Step-by-step explanation:
Given f(x,y) = 4x²-9xy+6y³, we are to find the derivative of the function with respect to x keeping y as constant.
Fx(x,y)
This is known as partial derivative of the function.
Fx(x,y) = 2(4)x^(2-1) - 9y + 0
Fx(x,y) = 8x -9y
Note that the differential of a constant is zero, hence the reason why 6y³ tends to zero since there are no x variable attached.
1. Which operation should be performed first to simplify the expression below?
(19 - 2 times 8 divided by 4 + 6)
Question:
Which operation should be performed first to simplify the expression below?19-2×8÷4+6
Answer:
I'm pretty sure you multiply first because PEMDAS (Parenthesis, Exponent, Multiplication, Division, Addition, Subtraction) says you go left to right and do multiplication or division first, so I would say it'd be multiplication.
how do you round 97500 to the nearest 100
Answer: 98000
Step-by-step explanation:
round 500 up to 1000 and add that to 97000 to get 98000
Marshall’s dog weighs 82 pounds. The vet
said 75 pounds would be more ideal for his
size. What percent of his weight does he
need to lose?
How many times a month do you workout? It’s for a math project!
Answer:
well 3 tike everyday so 3×31=93
Use algebra tiles to represent this polynomial x2-5x-1
get 2 shaded x tiles, 5 clear x tiles, and 1 clear tile.
Answer:
drag one tile into the product then click check. Then drag five into the product then click check. Then drag one tile into the product and click check..
Step-by-step explanation:
a triangle has two sides of lengths 4 and 7. What could the value of the third side be? select all that apply.
Answer:
Step-by-step explanation:
5,7,9
trust the process.
can somone help me please
Answer:
x=11.75
Step-by-step explanation:
brainliest fr ! ! !! After knee surgery, your trainer tells you to return to your jogging program slowly. He suggests jogging for 12 minutes each day for the first week. Each week thereafter, he suggests that you increase that time by 6 minutes per day. How many weeks will it be before you are up to jogging 60 minutes per day?
Answer: 8 weeks I believe
Step-by-step explanation:
12+6=18
18+6+6+6+6+6+6+6=60
or 18+42=60
A normal die (numbered 1-6) is fair if each outcome is equally likely. Therefore a 1 should come up of the time. If a fair die is rolled 360 times we would expect a 1 to come up 60 times (since 1 over 6 times 360 equals 60 ). If x represents the number of times a "1" is rolled then open vertical bar fraction numerator x minus 60 over denominator square root of 50 end fraction close vertical bar less than 1.96 gives the reasonable range for the number of times a "1" will come up in 360 rolls. If we roll the die 360 times and get a "1" 30 times, is our die a fair die? Show your work using the equation editor.
Answer:
Yes the die is fair as the calculated z= -0.224 is less than the Z∝= 1.96
Step-by-step explanation:
x`- u / s/√n< Z∝
x`- 60 /√50/√360 < 1.96
From the above we find that u = 60 and the sample size n= 360 S= √ 50
Z∝= 1.96
Here p = 1/6 ( the probability of getting a 1 out of 6)
q= 5/6
Since it is normal Standard deviation = √npq = √360 * 1/6*5/6= √50
If x`= 30
then
30 - 60 /√50/√360 < 1.96
-30/7.07*18.973 < 1.96
- 0.224 < 1.96
Yes the die is fair as the calculated z= -0.224 is less than the Z∝= 1.96 the null hypothesis that die rolled is fair is accepted.
Round 38.7165 to the nearest thousandth
Answer:
38.717
Step-by-step explanation
Let A, B, and C be any sets. Show that A × (B – C) = (A × B) – (A × C).
Can you help justify the proof
If × denotes the Cartesian product, and if a ∈ A and b ∈ B, then (a, b) ∈ A × B.
First prove that A × (B - C) ⊆ (A × B) - (A × C):
Let a ∈ A and b ∈ B - C.
By definition of the product, (a, b) ∈ A × B.
By definition of complement, b ∈ B and b ∉ C.
So (a, b) ∈ A × B and (a, b) ∉ A × C.
By definition of complement, (a, b) ∈ (A × B) - (A × C).
Therefore, A × (B - C) ⊆ (A × B) - (A × C).
Prove the other direction, that (A × B) - (A × C) ⊆ A × (B - C):
Let (a, b) ∈ (A × B) - (A × C).
By definition complement, (a, b) ∈ (A × B) and (a, b) ∉ (A × C).
By definition of the product, a ∈ A, b ∈ B, and b ∉ C.
By definition of complement, b ∈ B - C.
By definition of the product, (a, b) ∈ A × (B - C).
Therefore, (A × B) - (A × C) ⊆ A × (B - C).
Hence the two sets are equal. QED
7th grade math help I don't get this :(
Answer:
No solution
Step-by-step explanation:
Solve the system of equations with elimination or substitution.
Add the equations together:
A + (-B) + (-A) + B = -1 + 0
0 = -1
There is no solution.
8. Raven is making pillows. Each pillow requires 4/9 yards of fabric. Raven
has 12 yards of fabric. Determine the number of pillows Raven can make.
1/27
27
4
9
Answer:
Step-by-step explanation:
espera y termino y te ayudo vale que me falta poco
I'm in 6th grade what is 9p=72 solved mentally
Answer:
p=8
Step-by-step explanation:
It takes Eddie 2 hours to shovel the snow from a driveway and sidewalk. Brad can shovel the snow from the same driveway and sidewalk in 5 hours. How long would it take them working together to shovel the snow? Round your answer up to the next whole minute.
Abcd is a cyclic quadrilateral. o is the center of the circle ∠bad = 40°,then angle BCD=?,m(arc BCD) =?,m( arc BAD)=?
Answer:
m∠BCD = 140°
m(arc BCD) = 80°
m(arc BAD) = 280°
Step-by-step explanation:
In the cyclic quadrilateral, every two opposite angles are supplementary.The measure of the subtended arc to an inscribed angle equals twice the measure of this angleLet us use these facts to solve the question
∵ ABCD is a cyclic quadrilateral in circle O
∵ ∠BAD and ∠BCD are opposite angles
→ By using the 1st fact above
∴ m∠BAD + m∠BCD = 180°
∵ m∠BAD = 40°
∴ 40° + m∠BCD = 180°
→ Subtract 40° from both sides
∴ 40° - 40° + m∠BCD = 180° - 40°
∴ m∠BCD = 140°
∵ Arc BCD subtended the inscribed ∠BAD
→ By using the 2nd fact above
∴ m(arc BCD) = 2(m∠BAD)
∵ m∠BAD = 40°
∴ m(arc BCD) = 2(40°)
∴ m(arc BCD) = 80°
∵ Arc BAD subtended the inscribed ∠BCD
→ By using the 2nd fact above
∴ m(arc BAD) = 2(m∠BCD)
∵ m∠BCD = 140°
∴ m(arc BAD) = 2(140°)
∴ m(arc BAD) = 280°.
Covert 54 2/7% to a fraction in lowest terms
Put it over 100.
(54 2/7)/100
Simplify.
19/35
Answer: 19/353 5 7 +2 1 9 −( 5 7 + 1 9 )
Answer: -49
Step-by-step explanation:
Answer:
518
Step-by-step explanation:
Add 357 and 219 ( 594 )
( The negative symbol by an parenthesis means that there will be a 1 so it will be -1 )
Multiply -1 by each number in parenthesis
Then subtract -19 from -57 ( -76 )
Lastly you subtract -76 and 594
You should get your answer
Hope this helped, Have an AMAZING day!!
Help! Best Answer = Braniest
Answer:
x=20, Angles are 70° and 110°
Step-by-step explanation:
Angles are supplementary, so their sum is 180°
5x-30+x+90 = 180
6x+60 = 180
6x = 180-60
6x = 120
x = 20
5x-30 = 5*20 - 30 = 100 -30 = 70°
x+90 = 20 + 90 = 110°
CJ walks 8 miles in 3 hours, at what unit rate does he walk
Answer:
24
Step-by-step explanation:
you 8times3=24
2.5 miles a hour ( 2.666666666666667 miles an hour) lemme know if im
right !
What is the value of x ??
Answer:
56
Step-by-step explanation:
The angle on the top right is 90 degrees and the angle downwards is 34 degrees so subtract 90 and 34 to get 56.
