Answer:
x = 1/2
y = 4
Step-by-step explanation:
4x - y = -2 --------------------(I)
2x + 3y = 13 --------------------(II)
Multiply equation (I) by 3 and then add
(I)*3 12x - 3y = -6
(II) 2x + 3y = 13 {Now add and so y will be eliminated}
14x = 7
x = 7/14
x = 1/2
Plugin x = 1/2 in equation (I)
[tex]4*\frac{1}{2}-y = -2[/tex]
2 - y = -2
-y = -2 - 2
-y = -4
y = 4
Answer:
x=1/2
y=4
Step-by-step explanation:
4x-y=-2
-y=-4x-2
y=4x+2
2x+3y=13
2x+3(4x+2)=13
2x+12x+6=13
14x=7
x=1/2
y=4x+2
y=4(1/2)+2
y=2+2
Y=4
Help!! Please!! ASAP!!!
A model car is 12 inches
long. Using a scale of
3inches : 4 feet, how long
is the actual car?
A. 1 foot
B. 9 feet
C. 16 feet
Answer: C
Step-by-step explanation: If a car is 12 inches a room could possibly be 16 feet and a room and a car might or if not might have the same width
I hoped i helped :)
Answer: C) 16 feet
=======================================================
Work Shown:
3 inches on paper = 4 feet in real life
Multiply both sides by 4 so that the "3 inches on paper" turns into "12 inches on paper"
We get
4*(3 inches on paper) = 4*(4 feet in real life)
12 inches inches on paper = 16 feet in real life
This leads to the answer C) 16 feet.
--------------------------
Alternative Method:
(3 in on paper)/(4 ft in real life) = (12 in on paper)/(x ft in real life)
3/4 = 12/x
3*x = 4*12 ... cross multiply
3x = 48
x = 48/3 .... dividing both sides by 16
x = 16
The car's length is 16 feet in real life.
two thousand brown trout are introduced into a small lake. the lake has a volume of 20,000 cubic meters. use a table to find the probability that three brown trout are found in any given cubic meter of the lake.
a. find the average number of brown trout per cubic meter.
b.identify µ and x
c. use table 3 in appendix B to find the poison probability
d. interpret the results
e. determine whether the event is unusual. explain
Last year 858 people attended the Middleton County Fair. This year 1,635 people attended. What was the percent increase from last year to this year? (Round to the nearest percent)
Answer:
91%
Step-by-step explanation:
The first step is to calculate the increase
= 1635-858
= 777
Therefore the percent increase can be calculated as follows
= 777/858 × 100
= 0.905× 100
= 90.5 %
= 91%
Hence the percentage increase is 91%
3 pounds of bananas costs $1.5. What is the constant of proportionality that relates the cost in dollars. y, to the number of pounds of bananas, x?
1.5
0.5
2.5
4.5
HELP ASAP
Item 7 Question 1 Select the equation that represents the question. What percent of 300 is 51? 300=51×p 51=p×300 300=p×51 p=300×51 Question 2 Solve the equation. P= %
Answer:
51 = p×300
p = 17%
Step-by-step explanation:
Let p be the value of the percentage.
To find the percentage;
51/300 = p
51 = p * 300
Therefore, p = 0.17
Percentage represents a 100;
P = 0.17 * 100
P = 17%
Choose all the expressions that are equal to 0.8 × 0.03.
A. 8100×3100
B. 3100×810
C. 80100×3100
D. 310×8010
E. 810×3100
Answer: 8/10 × 3/100
3/100 × 8/10
Step-by-step explanation:
To be able to solve this question, we need to convert the decimals to Fractions. After they've bee converted to Fractions, we can then look at the options given and see the correct option.
0.8 will be 8/10 when converted to a fraction while 0.03 will be 3/100. Therefore, the correct option will be:
= 8/10 × 3/100 or 3/100 × 8/10.
Therefore, options B and E are correct.
Answer:
Step-by-step explanation:
ace
Is (-3,-9) a solution of the equation y = 3x ?
O YES
O NO
O NOT A SOLUTION
Answer:
Yes, (-3, -9) is a solution.
Step-by-step explanation:
y = 3x (-3,-9)
-9 = 3(-3)
-9 = -9
PLEASE HELP SOLVE THIS
Answer:
-3
Step-by-step explanation:
hope this helps
PLS HELP ASAP PLSSS IT DETECTS IF ITS RIGHT OR WRONG HELPPP
Answer:
Step-by-step explanation:
bottom one because x is the variable being changed
meaing that the "per months" is going to always be your x
Plz I need help on #12
Answer:
C its C
Step-by-step explanation:
Answer:
The answer is the fourth one
Simplify the expression: *
5(-2n + 4) + 2(n + 3)
Answer:
26- 8n
Step-by-step explanation:
-10n + 20 + 2n + 6
-10n+2n +6 +20
-8n + 26
Best regards
Answer:
-8n+26
Step-by-step explanation:
Carl Cornfield has been wondering whether he should plant white corn this year. He decides to sample 100 customers. 38% say they would purchase white corn. Carl wants to have a 95% confidence interval for this proportion.
The confidence interval is from 33% to 43% (to the nearest percent).
True
False
Answer:
true
Step-by-step explanation:
there are 325 7th graders in 12 classes . determine the unit rate
Find the value of x (Round to the nearest tenth) **Hint: Find the length
of the dotted line first***
Helppp!!!!!!!
Answer:
Length equal 12
Step-by-step explanation:
16^2+b^2=20^2
256+b^2=400 (subtract 256 on both sides)
b^2=144 (square root)
b=12
PLEASE HELP ME ASAP!!!!!!
Answer:
b
Step-by-step explanation:
Last year, Amy opened an investment account with $6800. At the end of the year, the amount in the account had increased by 23.5%. How much is this increase in dollars? How much money was in her account at the end of last year?
Answer:
-The increase in dollars is $1598
-The amount in her account at the end of last year was $8398.
Step-by-step explanation:
To find the increase, you have to multiply the initial amount for the percentage increase:
6800*23.5%=1598
Now, to find the amount in her account at the end of last year, you have to add the initial amount plus the increase in dollars:
6800+1598=8398
According to this, the amount in her account at the end of last year was $8398.
Answer fast plzzzzzzzzz
Answer:
its C
0.058
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
alex took a cab in new york city . the cabdriver charged $3.00 to ride in his cab and $1.50 per mile that he rode in the cab . if he spend $12 , how many did he ride in the cab ?
Answer
8 miles
Step-by-step explanation:
12 divided by 1.50 = 8
what is 9+10+10000000000000000+2000000000000000000+99999999999999999999999999999999999999999999
Answer:
1e+44
Step-by-step explanation:
Answer:
1e+44
Step-by-step explanation:
Between them Molly and Sue have 32 marbles. Molly has 3 times as many as Sue. How many marbles does each girl have?
Answer:
Sue has 8 marbles
Molly has 8 marbles
Step-by-step explanation:
m = number of marbles Molly has
s = number of marbles that sue has
m+s =32
m = 3s
Substitute the second equation into the first equation
3s+s =32
4s = 32
Divide by 4
4s/4 =32/4
s = 8
Sue has 8 marbles
m = 32 = 3*8 = 24
Molly has 8 marbles
PLS HELP ASAP, ILL MARK BRAINLIEST IF ITS A REAL ANSWER. LOOK AT THE PICTURE.
Answer:
#1 yes #2
Step-by-step explanation:
I added comments on why it is correct
What are the zeroes of the function?
y = (x – 3)(x + 2)(x – 2)
A. –3, 2, –2
B. –3, 2, 2
C. 3, –2, 2
D. 3, 2, 2
Answer:
Option C
Step-by-step explanation:
x - 3 = 0
Add 3 to both sides;
x = 3
x + 2 = 0
Subtract 2 from both sides;
x = -2
x - 2 = 0
Add 2 to both sides;
x = 2
Can people help me on this please I need it!!! It’s really important
Answer:
62
Step-by-step explanation:
The total of a triangle is 180
so 78+48 is 118
180-118=62
if its right i’ll give brainliest!!
Answer:
6.5
Step-by-step explanation:
Square 42
[tex]\sqrt{42}[/tex]=6.48074....
rounded to the tenth is 6.5
Hope this helps!
PLEASE HELP!!! THIS IS 25 POINTS!! ILL MARK BRAINLIEST PLEASE HELP!
What statements can be supported by data from the table? Check all that apply.
The table shows a partial representation of the equations.
(2, 3.1) is an ordered pair from the table.
Plant 1 grew faster than Plant 2.
Both plants died at week 4.
Answer:
Step-by-step explanation:
83bc i did the test
Answer: A, B, C
Step-by-step explanation:
Got it right on edg
An architect designs two similar triangular patios. The first patio has angle measures of (x − 10)°, (y + 25)°, and 60°. The second patio has angle measures of (x – 5)°, 55°, and 65°. Find the values of x and y.
Answer:x=65 y=40
Step-by-step explanation:
1) solve for x in the second triangle by adding each degree together and setting it equal to 180 (every triangle equals 180°)
2) x should equal 65
3) do the same for the first triangle except plug in 65 (since we know it equals x) and solve for y.
Which shows the explicit formula for the sequence below ?
-15, -6, 3, 12, 21, ...
Answer:
I think is F(N)=F(1)r
Step-by-step explanation:
cause you want to find f (8) of the geometric sequence when(1) =-4 and the common ratio is -2
Please help!! answer choices and question below
Answer:
3 because 3 times 4 is 12 and 18 divided by 6 is 3
Step-by-step explanation:
Write the zero that corresponds to the factor (x+5)
Answer:
0+5
Step-by-step explanation:
Hope this helps. :)
