Answers
Answer:
x = -5 y = -3
Step-by-step explanation:
-3x + 2y = 9
multiply the 2nd equation by 3 to set it up for elimination
3(x - 3y)= 3(4)
3x-9y = 12
so now combine both to add
-3x + 2y = 9
3x - 9y = 12
Adding both gives you
-7y = 21
divide both by -7 and you get
y = -3
and you substitute y back into equation to get x
x - 3 (-3) = 4 gives you
x + 9 = 4
x = 4 - 9
x = -5
Related Questions
hiii please help asap ill give brainliest if you give a correct answer tyyyyy
Answers
Answer:
25 miles per hour
Step-by-step explanation:
Answer:
25
Step-by-step explanation:
the answer is right there lol
Denise has $4.25 and needs to buy school supplies. She has a package of pencils that costs $1.75, a notebook that costs $1 and some erasers (x) that costs $0.25 each. At most, how many erasers can denise buy?
Answers
Answer:
6 erasers
Step-by-step explanation:
The pencils and the notebook together cost $2.75, from there you can calculate how many erasers.
1 eraser would bring the total to $3, therefore Denise can buy $1.25 more of erasers which is 5. 3 + 1.25 is $4.25. therefore Denise can buy 6 erasers
Answer:
he can buy 6 erasers
Step-by-step explanation:
because if you add 1.75 plus one and add 0.25 ....6 times it will equal 4.25 i hope this was helpful
Two books have a total of 345 pictures of dogs.
The first book has 121 pictures of dogs. How many
pictures of dogs are in the second book?
Answers
Answer:
224
Step-by-step explanation:
Simply do 345-121 to find the answer
Need this very badly
Answers
(8x5)x2= 80 square ft
8x7= 56 square ft
50+80+56=186 square ft
D) 186 square ft
Pls pls help I don’t have time HELP ASAP. It also detects if it’s right or wrong.
Answers
Answer:
70 i am 100 percent sure
Step-by-step explanation:
1:10
7 70
Can someone please answer my question? i have been working on school work all day.
here is 30 points just please answer all my questions that i post and i will give more
Write the sum, and then write an equivalent expression by collecting like terms and removing parentheses.
b. 2x - 7 and the opposite of 2x
Answers
Answer:
-70x
Step-by-step explanation:
Help pls thank you !!
Answers
Answer:
B is correct 4⁷ is the final answer
What is (-4/7) - (-10/7)=?
Answers
Answer: 6/7
Step-by-step explanation:
Answer:
0.85714285714 rounded to 0.86
Step-by-step explanation:
(-4/7) = -0.57<- rounded up
(-10/7)=-1.43<-rounded up
0.57- -1.43=0.86
C=5/9(F−32)
The equation above shows how temperature F, measured in degrees Fahrenheit, relates to a temperature C, measured in degrees Celsius. Based on the equation, which of the following must be true?
1. A temperature increase of 1 degree Fahrenheit is equivalent to a temperature increase of 5/9 degree Celsius.
2. A temperature increase of 1 degree Celsius is equivalent to a temperature increase of 1.8 degrees Fahrenheit.
3. A temperature increase of 5/9 degree Fahrenheit is equivalent to a temperature increase of 1 degree Celsius.
A) I only
B) II only
C) III only
D) I and II only
Answers
Answer:
D) I and II only
Step-by-step explanation:
3y - 15 =y + 1 solve for y
Answers
A n s w e r:
y = 8
Hope this helps!
PLEASE HELP! <3
What is the slope of the line?
Answers
Answer:
0
Step-by-step explanation:
The slope formula is (change in y)/(change in x)
since the numerator (change in y) is 0, the slope will be 0
How long is the rectangle? *
A rectangle is 5cm longer than it is wide.
The perimeter of the rectangle is 86cm.
How long is the rectangle?
Answers
Solution
here, length= 5cm
breath= ?
Perimeter= 86 cm
By the question,
Perimeter (P) = l×b = 86 cm
or, 5cm × b= 86 cm
or, b = 86÷ 5
or, b= 17.2 cm
Solve for q.
3
19
= 2
2/3
O 8/3
O 6/3
O 2
Answers
Answer:
3/4q=2 ÷3/4
q=8/3
Step-by-step explanation:
prove me wrong
There are 750 spectators of which of 420 are women and the rear are men what percent of the spectators are women
Answers
Answer: 56%
Step-by-step explanation:
There are 750 total people in this crowd.
420 are women and their percentage of the total is needed.
You get this by dividing the number of women by the total number of spectators and then multiplying by 100%:
= Number of women/ Total people * 100%
= 420 / 750 * 100%
= 56%
Line p intersects line a and b. a b. By which theorem is a1 ≈ a8
PLEASE HELP!!
Answers
Answer:
option a
Step-by-step explanation:
alternate exterior angle theorem
Solve for the variable.
6x-5=12
Answers
Answer:
6x-5=12 +5
6x=17 :6
x=2.8333333333
Step-by-step explanation:
prove me wrong
Dr. Montgomery recently graduated from medical school and his wife bought him an engraved stethoscope. The stethoscope cost $160.00. The sales tax in his city is 8%. What is the total cost of the stethoscope in dollars and cents including sales tax?
Answers
Answer:
172.8
Step-by-step explanation:
Answer:
172.8
Step-by-step explanation: Dont Trust Me But Its Right B)
Find the value of ‘n’ and measure-of each angle
Answers
Answer:
pleas give me free brainiestStep-by-step explanation:
1. It is not possible for a triangle to have more than one vertex with internal angle greater than or equal to 90°, or it would no longer be a triangle. 2. The interior angles of a triangle always add up to 180° while the exterior angles of a triangle are equal to the sum of the two interior angles that are not adjacent to it. Another way to calculate the exterior angle of a triangle is to subtract the angle of the vertex of interest from 180°. 3. The sum of the lengths of any two sides of a...
5.) 3x^2 - 13x + 4 = 0
Answers
Answer:
Answer:
x= 1/3 or x=4
Step-by-step explanation:
Let's solve your equation step-by-step.
3x2−13x+4=0
Step 1: Factor left side of equation.
(3x−1)(x−4)=0
Step 2: Set factors equal to 0.
3x−1=0 or x−4=0
x= 1/3or x=4
plz give brainlyest
does 18/24 and 15/20 form a proportion
Answers
Answer: yes
Step-by-step explanation:
when you simplify 18/24 goes to 3/4 and 15/20 simplifies to 3/4 as well so they are equivalent
I need help immediately!!
Answers
Which equals
F(4)=21
Answer:
f (4) = 21
Step-by-step explanation:
the given equation is f (x) = 4x + 5
putting the value of x = 4
we get, f (4) = (4×4) + 5
f (4) = 16 + 5
f (4) = 21
i hope u got it
solve for x pls hurry
Answers
Answer:
x=19
Step-by-step explanation:
5(x+35)=9(300
5x+175=270
5x=270-175
5x=95
95/5=19X
7+(-4) please help thank you
Answers
Answer:
3
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
Note that adding a negative quantity is equivalent to subtracting the negative quantity, that is
7 + (- 4) = 7 - 4 = 3
pLeAsE hElP mE...!!!!!!????? wut is 20 x 87
Answers
Answer:
69
jk 1740
Step-by-step explanation:
Answer:
well, the required answer is 1740
Step-by-step explanation:
it can be written as
=》 20 × ( 80 + 7 )
=》 1600 + 140
=》 1740
What is the ratio of boys to girls in Mrs. Carlton's class, which has a total of 31 students, 14 of whom are girls?
Answers
Answer:
17:14 or 17 to 14
Step-by-step explanation:
since you know there are 14 girls, subtract 14 from 31 and then you'll get 17. since its asking for a ratio of boys to girls not girls to boys, you put boys first, then girls. so your answer will be 17:14
Solve log2x = log53 + 1 by graphing. Round to the nearest tenth.
What does X equal?
Answers
Answer:
3.2 plz help me to
Step-by-step explanation:
Answer:
3.2
Step-by-step explanation:
PLEASE HELP THIS IS DUE TODAY
Area A: 6
Area B: 18
Area C: 3
Area D: 4
Area E: 2
Answers
Answer:
a) [tex]1\,cm^{2}[/tex] is [tex]\frac{1}{6}[/tex] of area A.
b) [tex]1\,cm^{2}[/tex] is [tex]\frac{1}{18}[/tex] of area B.
c) [tex]1\,cm^{2}[/tex] of [tex]\frac{1}{3}[/tex] of area C.
d) [tex]1\,cm^{2}[/tex] of [tex]\frac{1}{4}[/tex] of area D.
e) [tex]1\,cm^{2}[/tex] of [tex]\frac{1}{2}[/tex] of area E.
Step-by-step explanation:
According to stament, the area A is 6 square centimeters, the area B is 18 square centimeters, the area C is 3 square centimeters, the area D is 4 square centimeters and the area E is 2 square centimeters.
The purpose of this exercise is determine all ratios associated with each area, defined as a given area divided by the total area. Then, we proceed to determine each result:
([tex]A_{given} = 1\,cm^{2}[/tex], [tex]A_{A} = 6\,cm^{2}[/tex], [tex]A_{B} = 18\,cm^{2}[/tex], [tex]A_{C} = 3\,cm^{2}[/tex], [tex]A_{D} = 4\,cm^{2}[/tex], [tex]A_{E} = 2\,cm^{2}[/tex])
[tex]r_{A} = \frac{1\,cm^{2}}{6\,cm^{2}}[/tex]
[tex]r_{A} = \frac{1}{6}[/tex]
[tex]r_{B} = \frac{1\,cm^{2}}{18\,cm^{2}}[/tex]
[tex]r_{B} = \frac{1}{18}[/tex]
[tex]r_{C} = \frac{1\,cm^{2}}{3\,cm^{2}}[/tex]
[tex]r_{C} = \frac{1}{3}[/tex]
[tex]r_{D} = \frac{1\,cm^{2}}{4\,cm^{2}}[/tex]
[tex]r_{D} = \frac{1}{4}[/tex]
[tex]r_{E} = \frac{1\,cm^{2}}{2\,cm^{2}}[/tex]
[tex]r_{E} = \frac{1}{2}[/tex]
a) [tex]1\,cm^{2}[/tex] is [tex]\frac{1}{6}[/tex] of area A.
b) [tex]1\,cm^{2}[/tex] is [tex]\frac{1}{18}[/tex] of area B.
c) [tex]1\,cm^{2}[/tex] of [tex]\frac{1}{3}[/tex] of area C.
d) [tex]1\,cm^{2}[/tex] of [tex]\frac{1}{4}[/tex] of area D.
e) [tex]1\,cm^{2}[/tex] of [tex]\frac{1}{2}[/tex] of area E.
What is the angle measurement for 3/8 of a circle ??
Answers
Answer:
3pi/11...
.
.
.
...
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.
.
...
...
...
Answer:
135
Step-by-step explanation:
360/8=45
45x3=135
I’ll give you BRAINLEST PLEASE HELP
Answers
Answer:
Help with what?
Step-by-step explanation:
What is the mean of the set {4, 6, 8, 10}?
Answers
Answer:
Step-by-step explanation:
8 I think
Answer:
Defination:
.the collection of distinct elements or members.
Step-by-step explanation: