Answer:
[tex](-2;-6)[/tex]
Step-by-step explanation:
First of all, let's rewrite the first one after dividing both sides by 2.
[tex]\left \{ {{3x-2y=-12\atop {4x+5y=-2}} \right.[/tex]
Now, let's pick one you want to eliminate.
Eliminating x: Let's multiply the first one by 4, the second by 3, and subtract one from the other. Rest is simply solving an equation in one variable
[tex]4I-3II : 12x-8y-12x+15y = -48 - (-6)\\7y = -42 \rightarrow y= -6[/tex]
Eliminating y: Let's multiply the first by 5, the second by 2, and add them together. Rest is simply solving an equation in one variable
[tex]5I+2II: 15x -10y +8x +10y = -60 +4\\23x = -56 \rightarrow x=-2[/tex]
Natalie walked 35 mile in 12 hour. How fast did she walk, in miles per hour?
a. 3/10 mile per hour
b. 5/6 mile per hour
c. 1 1/5 miles per hour
d. 2 miles per hour
Answer:
almost 3 mph so I'm guessing (d) is the answer
Step-by-step explanation:
35 ÷ 12 = 2.9 miles per hour
432 women attended a conference. Women made up 72% of the total conference attendees.
Men made up the other 28% of attendees.
How many men attended the conference?
Answer:
168
Step-by-step explanation:
If entire number of attendees = y
then number of women = y* (72/100)
since y* (72/100) = 432 ( given)
y =( 432*100)/72
so, y = 600
since men made up the remaining 28% of attendees ,
number of men = y * (28/100) = 600* (28/100)
number of men = 168
A customer in a coffee shop purchases a blend of two coffees: Kenyan, costing $3.50 a pound, and Sri Lankan, costing $5.60 a pound. He buys 3 lb of the blend, which costs him $11.55. How many pounds of each kind went into the mixture
Answer:
10.55.
Step-by-step explanation:
no
helpppppp asapppppp pls
A: 80°
B: 75°
C: 110°
D: 95°
Answer:
A. 80 degrees
Step-by-step explanation:
the equation at the top tells you that they are the same shape so you just need to find which angle one the first shape is equal to the angle H
[tex]\sqrt{54} \times \sqrt{54}[/tex]
Answer:
19.9202745546
Step-by-step explanation:
54 will be your answer...
60x4= blank tens x 4 = blank tens = blank
Answer:6 tens
Step-by-step explanation:
Simple. 60 equals 6 tens so blank equals 6 tens
Blank tens = 6
Hope this helps :)
yoo I don't understand this pls help :))
geometry
Answer:
At the bottom of the text.
Step-by-step explanation:
The triangle is isosceles. The measure of the two internal angles J and K are equal; The misure of the external K angle (2) is half a circle minus the internal K (1). The internal angle in R is calculated by difference between 180 and twice the internal K angle (1).
1. 72° as well.
2. 180-70-70 = 40°
3. [tex]m\angle2 = 110 \rightarrow m\angle1 =70[/tex], Same as #2: 40°
4. [tex]x+2x+2x = 180 \rightarrow 5x=180 \righarrow x= 36[/tex]
5. [tex]x +(x+30)+(x+30) = 180 \rightarrow 3x +60 = 180 \rightarrow 3x= 120 \rightarrow x=40[/tex]
Can someone please help I will give you 30 points and brainliest if the answer is right also no links please
Answer:
HL.
Step-by-step explanation:
Triangles FEH and FGH are congruent
They are both right angles and the hypotenuse and a leg ( the side FH) are both equal in length.
85/8 rounded to the nearest tenth
Answer:
85/8 = 10.625
= 10.6
Step-by-step explanation:
If you like my answer than please mark me brainliest thanks
Hi guys can you please help me??
THANK YOU SO MUCH
Answer: it’s 320cm^2
Step-by-step explanation:
Daniella has 130 baseball cards. She buys new cards to her collection every month. Which arithmetic sequence describes the number of cards in her collection?
Answer:
a1=130;an=an−1+10
Step-by-step explanation:
The answer is the third one.
She starts with 130
a1 = 130
She adds 10 every month.
So you take the number she had last month (represented by a_n-1) and adds 10.
Answer
a1 = 130
an = an_1 + 10
C
Q5. Here is a list of eight numbers
(Total for questio
4 5 4 25 29 30 33 39 40
From the list, write down
(i) a factor of 20
(ii) a multiple of 10
(iii) the prime number that is greater than 15
(Total for Questi
maths
Hi ;-)!
Here, from the options given, the answers are:-
i) 4 & 5
ii) 30
iii) 29
Jill is buying a cookie kit to decorate cookies for her children during the holiday break. She will pay $2.50 per cookie and a $4 service fee. Which equation can be used to find y, the total cost to buy x cookies?
Answer:
4 + 2.5x=cost
Step-by-step explanation:
Geometry help me!
Extra points!
Answer:
71
Step-by-step explanation:
13. Find the distance between (-9, -1) and (-2,-6). Round to the nearest tenth.
A) 8.6
B) 12.1
C) 9.9
D) 13.0
Answer:
(A) 8.6
Step-by-step explanation:
distance =√((x_2-x_1)²+(y_2-y_1)²)
the actual distance is 8.602325.
rounded distance is 8.6
When divding numbers with the same base you________ the exponents
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
When divding numbers with the same base you subtract the exponents ~
Answer:
subtracts
Step-by-step explanation:
hope this helps
pls I need a step by step on how to solve
2+4=6−2
Answer:
4
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
x
(— - 6) - 2 = 0
4
6 6 • 4
6 = — = —————
1 4
x - (6 • 4) x - 24
——————————— = ——————
4 4
(x - 24)
———————— - 2 = 0
4
2 2 • 4
2 = — = —————
1 4
(x-24) - (2 • 4) x - 32
———————————————— = ——————
4 4
x - 32
—————— = 0
4
x-32
———— • 4 = 0 • 4
4
x-32
Help Plz this is due tomorrow
Write slope-intercept form of a linear equation
(1,5) and (3,9)
(5,8) and (3,2)
(1,-5) and (0,3)
If you can, when you answer can you put the steps plz
thx
(1,5) and (3,9)
[tex]y = 2x + 3[/tex]
(5,8) and (3,2)
[tex]y = 3x - 7[/tex]
(1,-5) and (0,3)
[tex]y = - 8x + 3[/tex]
First you need to plot the pointsThen you will find the slope (m), by using rise over runThen we will find the y-intercept (b). To find the y-intercept, choose one of the points on the line.Then you write the equation in slope intercept form (y = mx + b)Hope this will help:)
How to predict the charge of monatomic ions.
Answer:
by gaining or losing electrons
Step-by-step explanation:
hope it helped
brainliest pls
PARALLEL PERPENDICULAR OR NEITHER
[tex]\boxed{\sf x+3=12}[/tex]
Answer:
x = 9
Step-by-step explanation:
x+3 = 12x+3-3 = 12-3x = 9Answer:
x=9
Step-by-step explanation:
[tex]x+3=12[/tex]
[tex]x+3-3=12-3[/tex] ( Subtract 3 from both sides)
[tex]x=9[/tex]
Will give brainliest
What is the equation of a line that is parallel to 2x+5y=10 and passes through the point (5, -4)?
Enter your answer in slope-intercept form (y=mx+b) in the box
Answer: The equation of a line that passes through the point (5, −4) and is parallel to the line whose equation is 2x + 5y = 10 is y = (-2/5)x - 2
Step-by-step explanation: The equation of a straight line is given by:
y = mx + b
where y, x are variables, m is the slope of the line and b is the y intercept.
The slope of the line 2x + 5y = 10 is:
2x + 5y = 10
5y = -2x + 10
y = -2/5x + 10
Hence the slope of the line 2x + 5y = 10 is -2/5
Since both lines are parallel, hence the slope of the other line is the same (-2/5). Hence the equation of the line is:
The equation of a line that passes through the point (5, −4) and is parallel to the line whose equation is 2x + 5y = 10 is y = (-2/5)x - 2
Isolate y
[tex]\\ \sf\longmapsto 5y=-2x+10[/tex]
[tex]\\ \sf\longmapsto y=-2/5x+2[/tex]
m=-2/5Parallel line has equal slope
Equation of line in point slope form
[tex]\\ \sf\longmapsto y-y_1=m(x-x_1)[/tex]
[tex]\\ \sf\longmapsto y+4=-2/5(x-5)[/tex]
[tex]\\ \sf\longmapsto 5y+20=-2x+10[/tex]
[tex]\\ \sf\longmapsto 2x+5y+10=0[/tex]
You have been saving your money to buy a new pair of shoes. Three different stores are having a sale on them. Which store has the best deal?
Store A
Original Price: $70
Take 10% off.
Then, take 10 percent off that price.
Store B
Original Price: $80 Take $15 off.
Then, take 10 percent off that price.
Store C
Original Price: $90
Take 10% off.
Then, take $20 off that price.
A) Store A
B) Store B
C) Store C
Answer:
Store A would be the least expensive.
Step-by-step explanation:
Store A
70*0.10=7
70-7=63
63*0.10=6.30
63-6.30=57.70
$57.70
Store B
80-15=65
65*0.10=6.50
65-6.50=58.50
$58.50
Store C
90*0.10=9
90-9=81
81-20=61
$61
What coordinates do I plot at
Answer:
Step-by-step explanation:
y - 10 = -2(x - 10)
y - 10 = -2x + 20
y = -2x + 20 + 10
y = -2x + 30
When x = 0 ; y = 0 + 30 = 30 ; (0,30)
When x = 10 ; y = -2*10 + 30 = -20 +30 = 10 ; (10 , 10)
When x = 5 ; y = -2*5 + 30 = -10 + 30 = 20 ; (5 , 20)
Plot ( 0 ,30) ; (10,10) & (5,20)
the answer is B:
I just did the question
Answer:
huh? did you mean to send in tgis as a question or something???
Ruben bought 666 comic books for \$21$21dollar sign, 21. Each comic book was the same price.
What was the cost for 111 comic book?
\$
Answer:
$3.50
Step-by-step explanation:
111 is a sixth of 666 so its 21/6 which is 3 dollars 50 cents.
For which of the following inequalities, is -4 part of the solution set? Select all that apply. A. x > -5 . B. 2 > X . C. 3x + 4 > -8 D. 5x < 2x - 3 E. ---6 < 4 - 2x
[tex]-4[/tex] is a part of the solution set to all of the inequalities
We will consider each inequality in turn:
For [tex]x>-5[/tex]:
The solution set is [tex]\{{-4,-3,-2,-1,...\}[/tex]
So [tex]-4[/tex] is a part of the solution set of [tex]x>-5[/tex]
For [tex]2>x[/tex], or [tex]x<2[/tex]:
The solution set is [tex]\{{1,0-1,-2,-3,-4,...\}[/tex]
So [tex]-4[/tex] is a part of the solution set of [tex]2>x[/tex]
For [tex]3x+4\ge -8[/tex]:
We have to solve first
[tex]3x+4\ge -8\\3x\ge -8-4\\3x\ge -12\\x\ge -4\\[/tex]
The solution set is [tex]\{{-4,-3,-2,-1,0,...\}[/tex]
So [tex]-4[/tex] is a part of the solution set of [tex]3x+4\ge -8[/tex]
For [tex]5x\le 2x-3[/tex]:
We have to solve first
[tex]5x\le 2x-3\\5x-2x\le-3\\3x\le-3\\x\le-1[/tex]
The solution set is [tex]\{{-1,-2,-3,-4,-5,...\}[/tex]
So [tex]-4[/tex] is a part of the solution set of [tex]5x\le 2x-3[/tex]
For [tex]-6<4-2x[/tex]:
We have to solve first
[tex]-6<4-2x\\2x<4+6\\2x<10\\x<5[/tex]
The solution set is [tex]\{{4,3,2,...,-3,-4,-5,...\}[/tex]
So [tex]-4[/tex] is a part of the solution set of [tex]-6<4-2x[/tex]
So, [tex]-4[/tex] is a part of the solution set of all the inequalities.
Learn more about inequalities here: https://brainly.com/question/278997
How many square metres of wallpaper are needed to cover a wall 8 metres long and 3 metres high? Can some one help me with this please?
Answer:
24 square meters of wallpaper
Step-by-step explanation:
Hope this helps.
Daphne gave away 3 more than half of her apples. she gave awya 17 apple in all. How many apples did Daphne have originally?
Answer:
28
Step-by-step explanation:
Between which two integers does the square root of 117 lie
Answer: 10 and 11 or -11 and -10
Answer:
Step-by-step explanation:
10 and 11 or -10 and -11