Answer:
The first step is to replace the value of x from the first equation with x in the second equation:
x=y-7
3x+15y=-1
3(y-7)+15y=-1
3y-21+15y=-1
18y=-1+21
18y=20
y= [tex]\frac{20}{18}[/tex] = [tex]\frac{10}{9}[/tex]
x= [tex]\frac{10}{9}[/tex] [tex]- 7[/tex]
x=[tex]- \frac{53}{9}[/tex]
How do I solve for X?
Answer:
not sure how to explain how to solve it but I believe x=11
Step-by-step explanation:
Pond Critters
Ms. Wilson sets up a pond water aquarium in the classroom. Ms. Wilson tells the class
there are five different kinds of aquatic animals in the aquarium. There are caddis fly
larvae, diving beetles, whirligig beetles, dragonflies and tadpoles.
Ms. Wilson says one-twelfth of the pond animals are dragonflies. One-third of the
animals are caddis fly larvae. One-fourth are tadpoles. There are the same number of
diving beetles as whirligig beetles. If there are six dragonflies, how many pond critters
are in the aquarium? How many caddis fly larvae, tadpoles, diving beetles and whirligig
beetles are in the aquarium? Show all your mathematical thinking.
Answer: There are 72 pond critters in the aquarium. There are 24 caddis fly larvae, 18 tadpoles, 12 diving beetles and 12 whirligig beetles in the aquarium.
Step-by-step explanation:
Given : There are caddis fly larvae, diving beetles, whirligig beetles, dragonflies and tadpoles in the aquarium
One-twelfth of the pond animals are dragonflies
One-third of the animals are caddis fly larvae.
One-fourth are tadpoles.
The same number of diving beetles as whirligig beetles.
Number of dragon flies = 6
Let the total animals are = x, dragon flies are represented by d , caddis fly larvae as c, tadpoles as t , diving beetles as b and whirligig beetles as w.
Now : x = d + c + t+ b + w
[tex]\frac{1}{12}\times x=d[/tex] (1)
[tex]\frac{1}{3}\times x=c[/tex] (2)
[tex]\frac{1}{4}\times x=t[/tex] (3)
[tex]b=w[/tex] (4)
[tex]d=6[/tex] (5)
Comparing 1 and 5
[tex]\frac{1}{12}\times x=6////x=72[/tex]
Thus pond critters are 72.
[tex]c=\frac{1}{3}\times 72=24[/tex]
[tex]t=\frac{1}{4}\times 72=18[/tex]
[tex]d=6[/tex]
Now x = d + c + t+ b + w
72 = 6+24+18+b+b (as b= w)
2b =24
b = 12
Thus w = 12.
please help ill give brainliest
A rat population is currently 10000. It would triple after 120 days. How many days does the population stay under 100000?
Answer:
I think the answer is 120 days
Step-by-step explanation:
After 120 days, population will be 10000 times 3 which is equal to 30000
After another 120 days, population will be 30000 times 3 which is equal to 90000 and 90000 is under 100000
hence after 240 days, the population will still stay under 100000
Answer:
120 days
Step-by-step explanation:
It will remain the same as before.
Given the system of equations, match the following items. x + 2y = 7 x - 2y = -1
Answer:
efd
Step-by-step explanation:
fsdvchrsdfg
how can you change mm to meters
Answer:
Step-by-step explanation:
1 meter = 1000 mm
So, 1 mm = [tex]\frac{1}{1000}[/tex] m
To change mm to meter, divide the given mm value by 1000
Ex: 50 mm = 50 ÷ 1000 = 0.05 m
5 mm = 5 ÷ 1000 = 0.005
Answer:
To convert millimeters to meters, multiply the number of millimeters by 0.001.
To convert meters to millimeters, multiply the number of meters by 1000.
Step-by-step explanation:
1 millimeter is 0.001 meters.
1 meter is 1000 millimeters.
To convert millimeters to meters, multiply the number of millimeters by 0.001.
Example:
This object is 100 millimeters long. How many meters long is it?
100 x 0.001 = 0.1
0.1 meters.
To convert meters to millimeters, multiply the number of meters by 1000.
Example:
This object is 100 meters long. How many millimeters long is it?
100 x 1000 = 100000
100000 millimeters.
anyone got tips on how to be more socially confident?
Answer:
Hmmmm i'm not sure. I don't have much social confidence but apparently people like talking to me. I just kind of act nice and caring
Step-by-step explanation:
Answer:
Find people in the same position as you and try and make more friends people may tease you but it's because they want to break you tear you down. But, when you find that special person in your life they will act like glue and you'll be as good as new!
Calculate the total cost of my bill if I order 2 dozen cricket balls at $100.00 each.
Answer: $2400.00 without 8% tax $2592.00 with 8% tax
Step-by-step explanation:
2x12x100
(X1.08 for tax)
what's the value of given expression
[tex] \sqrt{18 \times 2} [/tex]
If y varies to x and if y=6 when , x=9 find y when x=15
Answer:
y=10
Step-by-step explanation:
Set up a proportion
x/y = 9/6 (simplified, 3/2)
15/y = 3/2
Use cross multiplication,
3y = 30
y = 10
PLEASE HELP Ramone took the SAT twice. He scored 1340
on his second try, which was 190 points
higher than his first score. Find his first score.
Answer:
1150
Step-by-step explanation:
1340-190=1150
Answer:
1530
Step-by-step explanation:
well frist you have to see that he got a lower score then his first try then you would have to add because you are trying to figure out what his frist score was. So the problem would be 1340+190=?
find the area of a circle with a circumference of 131.95
Answer:
A=1385.51
Step-by-step explanation:
A=pir^2
C= 2pir
A= C^2/4pi
131.95^2/4pi
A= 1385.51
Answer:
Step-by-step explanation:
which value makes the inequality X > 2.5 true??
Answer:
X= 5.
Step-by-step explanation:
Basically, any number that is greater than 2.5
Hope this helps. =)
Find the value of x if m 1= 4x + 2
Answer:
x= -1/4
Step-by-step explanation:
The value of x is -1/4 in the given equation 1=4x+2.
What is Equation?Two or more expressions with an Equal sign is called as Equation.
The given equation is 1=4x+2
One equal to four times of x plus two
In the given equation x is the variable and plus is the operator.
1=4x+2
Subtract 2 from both sides to isolate the x term
1-2=4x
-1=4x
Divide both sides by 4
x=-1/4
Hence, the value of x is -1/4 in the given equation 1=4x+2.
To learn more on Equation:
https://brainly.com/question/10413253
#SPJ2
The line plot shows the distances, in miles, run by joggers in a park.
---------------------------------
A number line with one x above .5, one x above 1.5, one x above 2, one x above 3, two xs above 3.5, two xs above 4, one x above 4.5, and one x above 8.5.
How many runners ran at least 3 miles?
Enter your answer in the box.
{ } runners
Answer:
7 runners
Step-by-step explanation:
In order to figure this question out, you need to count them up. Count up all the runners that are plotted from 3 miles on. Anything before that is under 3 miles, so it doesn't count.
After counting them up, you will find that there are 7 runners marked who ran 3 miles or more. So your answer is 7 runners.
I hope this helps! Please let me know if you need any more help. Have a great day!
Classify the polynomial by degree
Answer:
Linear polynomial
Step-by-step explanation:
10 + 7x
The highest power of the variable is the degree of the polynomial.
Power of x is 1
Degree of the polynomial is 1
So, it is Linear polynomial
Plz, help. What is the mode?
Answer:
None
Step-by-step explanation:
Mode is the number that repeats the most. All of these numbers are unique, and there is no repeats, therefore there is no mode.
Answer:
what do you mean do you just have to pic one of the answers that are not crossed
Step-by-step explanation:
Help brainy please help help help
Answer:y=-x
Step-by-step explanation:
A triangle has three angles with the measures of (2x), (2x + 14), and (6x + 6)".
What is the measure of the smallest angle in the triangle?
Answer:
Option c : 32 degree.
Step-by-step explanation:
2x + 2x + 14 + 6x + 6 = 180 degrees
10x = 160
x = 16
2x = 16 *2 = 32 degrees
Answer:
Step-by-step explanation:
Angles in a triangle add up to 180°
You take 2x+2x+14+6x+6=180°
Collect like term and add 2x+2x+6x+14+4=180°
10x+20=180°
10x=180°-20
10x=160÷10
x=16
16*2=32
16*2+14=46
16*6+6=100
Smallest angle is 32
A ramp was constructed to load a truck. If the ramp is 8 feet long and the horizontal distance from the bottom of the ramp to the truck is 3 feet, what is the vertical height of the ramp?
Answer:
x=[tex]\sqrt{55}[/tex] or about 7.4
Step-by-step explanation:
Use the Pythagorean Theorem:
8^2=3^2+x^2
64=9+x^2
55=x^2
x=[tex]\sqrt{55}[/tex] or about 7.4
Answer:
7.42 feet
Step-by-step explanation:
.
complete the statement to describe the expression
if you had a phone you could download brainly and use a photo to search your answer
Step-by-step explanation:
Answer:
It has 4 factors and 2 terms
Step-by-step explanation:
The terms are the groups of parentheses and the factors are the variables that are inside the parentheses.I hope this helps!
Hi y’all can plz help me with this it would mean a lot.....Thanks!
Answer:
where's the question 0.0
Which of the following points does not lie on the line y = -2x +5?
A. (4-3)
B. (-2,9)
с. (3,1)
D. (-1,7)
E. (2, 1)
Answer:
C (3, 1 )
Step-by-step explanation:
To determine if a point lies on the line, substitute the x- coordinate of the point into the equation and if the value obtained equals the y- coordinate of the point then it lies on the line, otherwise not on line.
A (4 , - 3)
y = - 2(4) + 5 = - 8 + 5 = - 3 ← lies on line
B (- 2, 9 )
y = - 2(- 2) + 5 = 4 + 5 = 9 ← lies on line
C (3, 1 )
y = - 2(3) + 5 = - 6 + 5 = - 1 ≠ 1 ← not on line
D (- 1, 7 )
y = - 2(- 1) + 5 = 2 + 5 = 7 ← lies on line
E (2, 1 ) = - 2(2) + 5 = - 4 + 5 = 1 ← lies on line
Thus (3, 1 ) does not lie on the line → C
Monday at the movies, the three McDonald siblings spent $44 on three tickets and two popcorn/drink combos. Thursday, they each brought a friend and spent $97.25 on six tickets and five combos. What is the cost of a ticket and the cost of a popcorn/drink combo?
Answer:
Step-by-step explanation:
Write an equation for the polynomial graphed below
y(x)=_________
Answer:
dont know the answer i feel sry for u
: )
Step-by-step explanation:
plz help!! I need an answer ASAP
Answer:
-5/2
Step-by-step explanation:
-5y=-2x+3
y=2/5x-3/5
The slope is negative recipricol
Write two equivalent rates for 3 breads made in 45 minutes.
Answer:
1/15 ; 6/90
Step-by-step explanation:
[tex]\frac{3}{45}=\frac{1}{15} \\\\\frac{3}{45}=\frac{3*2}{45*2}=\frac{6}{90}[/tex]
The Johnson family buys a new furnace and air conditioner unit for $5000.00. The purchase is made with a credit card that has a 12% APR.
The Johnsons make a $250.00 monthly payment. How many months will it take to pay off the credit card balance? Enter your answer as a whole number, such as: 40.
Pls help will give the big brain award
+if you help more you get more brainliest
Answer:
56in³
Step-by-step explanation:
you can make an imaginary division and create two different prisms. the bigger prism's volume is 4×3×4=48 and the smaller prism's volume is 4×2×1=8. add up the product to get total volume of 56in³ (³ because it is volume and not area)
10. Which expression is equivalent to 1.6x-4.8?
(3 Points)
0.4(4x - 1.2)
0.2(8x + 24)
0.8(2x – 0.6)
0.8(2x - 6)
Answer is
0.8(2x-6)
Step-by-step explanation:
0.8x2x=1.6x
0.8x-6 = -4.8