Answer: 50 percent i think
Answer:48%
Step-by-step explanation:The reason is because 50% is 25 AND lower, when it said under 25
Use the elimination method to solve the system of equations. Choose the
correct ordered pair.
x-3y = -19
2x+y=-3
A. (-2, 1)
B. (-4,5)
C. (4, -11)
D. (-1,1)
SUBMIT
Answer:
x=-4,y=5
Step-by-step explanation:
Answer:
B (-4,5)
Step-by-step explanation:
x-3y=-19
2x+y=-3
this is how I'll start it off, I'll multiple the bottom equation by 3 to have the y-value become the reciprocal (opposite) of the top equation.
now it's:
x-3y=-19
6x+3y=-9
now add/subtract
7x=-28
divide 7 from both sides
x=-4
now plug -4 into the equations to get y
-4-3y=-19
add 4 to both sides to get rid of -4
-3y=-15
divide -3 on both sides
y=5
now to double check, do the other equation
2(-4)+y=-3
-8+y=-3
add 8 to both sides to get rid of -8
y=5
now to check the answer, plug in x=-4 and y=5 into the equations
-4-3(5)=-19
-4-15=-19
2(-4)+5=-3
-8+5=-3
which of the following is equal to the square root of -5
Answer:
√5 i
Step-by-step explanation:
√-5
√5*√-1
√-1=i
√5*i
√5 i
pls help will mark as brainliest
Answer:
C or [tex]y=\frac{1}{4}^{x}[/tex]
Step-by-step explanation:
when x is 0 y is 1 and every positive number to the zeroth power is 1
so It can be A or C
but the value of y goes down when x goes up so its exponential decay or less than 1 so 1/4<1 So
C or [tex]y=\frac{1}{4}^{x}[/tex]
Using the data set provided below, order the values from greatest to least.
41, 45, 45, 47, 50, 53, 54, 55
Select one:
A. Mean > Median > Mode
B. Median > Mode > Mean
C. Mode > Mean > Median
D. Mean > Mode > Median
E. Median > Mean > Mode
i dont get this at all
Answer: Not sure what you are asking; please edit your question so that I have the ability to assist you.
Step-by-step explanation: If the teacher did not include much information, go ahead and email her and let her know. I am not sure what the work you are doing in class is but try to ask her if she could help and if you need anything else, let me know!
Stay safe. Stay warm.
<3
-Carrie
Identify the solutions to the quadratic equation
x2 + 4x-21 = 0
Check all that apply
O A. x= 3
B. X= -7
O C. x = 21
O D. x= -5
O E. x= 4
Answer:
Step-by-step explanation:
Solving quadratics is easy. With no coefficient to the x^2, we can go right to finding factors. We want two numbers that multiply to -21, and add to 4. Our numbers are 7, and -3. Now, we move the numbers around to be (x-3) and (x+7). We know that these both equal 0, so we can do basic algebra to solve for x. We can subtract 7 to the other side to just get x, and add 3 over because it is subtracted by x. This leaves us with our answers:
x = -7, x = 3
Which equation in rectangular form describes the parametric equations x=5-3cost and y=4+2sint?
A. (x+5)^2/9+(y+4)^2/4=1
B. (y+4)^2/2-(x+5)^2/3=1
C. (y-4)^2/2-(x-5)^2/3=1
D. (x-5)^2/9+(y-4)^2/4=1
Answer:
D. (-x+5)^2/9+(y-4)^2/4=1 (I assume there was a mistype)
Step-by-step explanation:
The first step is isolating the sine and cosine functions.
x=5-3cos(t)
x + 3cos(t) = 5
3cos(t) = 5 - x
cos(t) = (5 - x)/3
y=4+2sin(t)
y - 4 = 2sin(t)
(y - 4)/2 = sin(t)
Then, square at both sides of the equal sign
cos²(t) = (5 - x)²/3² = (5 - x)²/9
sin²(t) = (y - 4)²/2² = (y - 4)²/4
Recall the trigonometric identity and replace.
cos²(t) + sin²(t) = 1
(5 - x)²/9 + (y - 4)²/4 = 1
Please HELP WILL MARK BRAINLIEST 25 POINTS!!!!
The rectangle shown is dilated by a scale factor of 15.
What is the length of side A'B' and side B'D'?
Answer:
AC=8 and CD=15
Step-by-step explanation:
Answer:
8 AND 15 :)
Step-by-step explanation:
Please I need help with my geometry math assignment with 13C and is Almost soon to due and I been struggling and needing help on it I try my best and don’t work out for me so I will mark your guys brainlist
Answer: y = 2x + 2
Step-by-step explanation:
To find the slope of a line perpendicular to another line, you take the slope of the other line and flip it (find the negative reciprocal) and make it negative.
In this case, -1/2 would become 2. 2 is now the slope of the line perpendicular to the other line.
Since the line passes through (1, 4), we can plug the point in - the line will be
y = 2x + 2.
Answer:
y=2x+2.
Step-by-step explanation:
Honestly the perpendicular flipping didn't make sense, but somehow google thought so, so ill leave it at this, if you need more help, just message me.
NEED HELP!!!!! Evaluate 3x - y + z, when x = 2, y = -4, and z = 10
Answer:
20
Step-by-step explanation:
3x-y+z; x=2, y=-4, z=10
3x-y+z
3*2-(-4)+10
6+4+10
10+10
20
Step-by-step explanation:
Step 1: Find the solution
[tex]3x - y + z[/tex]
[tex]3(2) - (-4) + (10)[/tex]
[tex]6 + 4 + 10[/tex]
[tex]20[/tex]
Answer: [tex]20[/tex]
Rhoda completed the right column of the table to help her find the sum of One-half and One-third.In which step did her first error occur? Step 1 Step 2 Step 3 Step 4
Answer:
her error was in the second step
Step-by-step explanation:
her fraction was 1/2 but the way the bar was split is wrong it was supposed to have only two sides with 1 shaded in but has 6 with 3 shaded in
Which expression should you simplify to find the 90% confidence interval,
given a sample of 64 people with a sample proportion of 0.55?
Step-by-step explanation:
CI = p ± z √(pq/n)
For 90% confidence, z = 1.645.
CI = 0.55 ± 1.645√(0.55 × 0.45 / 64)
The expression to find the 90% confidence interval is
[tex]CI = 0.55 + 1.645 \sqrt{\frac{0.55 ( 0.45)}{64} }[/tex]
What is confidence interval?A confidence interval is a range of estimates for an unknown parameter. A confidence interval is computed at a designated confidence level; the 95% confidence level is most common, but other levels, such as 90% or 99%, are sometimes used.
CI z
0.70 1.04
0.75 1.15
0.80 1.28
0.85 1.44
0.90 1.645
0.92 1.75
0.95 1.96
0.96 2.05
0.98 2.33
0.99 2.58
According to the question
Data of people = 64
Data proportion (P) = 0.55
The 90% confidence interval
therefore, [tex]z_{c}[/tex] = 1.645
CI = P± [tex]z \sqrt{\frac{P ( 1-P}{N} }[/tex]
substituting the value
[tex]CI = 0.55 + 1.645 \sqrt{\frac{0.55 ( 0.45)}{64} }[/tex]
CI = 0.5563
Hence, expression to find the 90% confidence interval is
[tex]CI = 0.55 + 1.645 \sqrt{\frac{0.55 ( 0.45)}{64} }[/tex]
To know more about confidence interval here:
https://brainly.com/question/24131141
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Identify the terms and the like terms in this expression.
7 + a – 2 + 3a + b^2
Which statements are true? Check all that apply.
a. The expression contains seven terms.
b. The terms in the expression are 7, a, 2, 3a, b2.
c. Constants are like terms.
d. 2 and b2 are like terms because they both contain the number 2.
e.a and 3a are like terms.
f. a, 3a, and b2 contain variables, so they are like terms.
Answer:
B, C, E
Step-by-step explanation:
I took the test and I got it right
Answer: B C E
Step-by-step explanation: Edge 2020-WAiT! It’s not 2020 any MORE! Anyways edge 2021
When 240 sixth-grade students were polled, results showed that 96 students were dissatisfied with the music played at the school dance. What percentage of the sixth-grade students does this represent? Use at least 2 strategies.
Answer:
40%
Step-by-step explanation:
one strategie is doing proportions
96/240= ?/100
simplify 96/240= 2/5
so 2/5=?/100
multiply 100 by 2
then divide it by 5
another strategie is putting it into a decimal and percent
96/240= 2/5
in decimal is 0.40
move the decimal twice to the right and you get 40%
Evaluate y=(1/5)x
when x=- 3
Answer:
125y
hope this helps
Answer:
Y = 125
Step-by-step explanation:
Which of the following is equivalent to 7-2( x + 2) <-4 - 3(1 – x)?
(A) -5 x < -10
(B) - X<-16
(C) -2x <-17
(D) 6x<-9
If we draw a ball from an urn containing 10 numbered balls, with seven red balls that are numbered 1, 2, 3, 4, 5, 6, 7 and three that are green and are numbered 8, 9, 10, what is the probability of drawing a ball that is red and even?
a. 2/5
b. 3/10
c. 1/2
d. 4/7
Answer:
b
Step-by-step explanation:
The price of a cup of coffee was $2.85 yesterday. Today, the price fell to $2.50. Find the percentage decrease, Round your answer to the nearest tenth of a
percent
18. Convert 395 to a mixed number
written in lowest terms.
A. 4577
B.5 41
C.745
O D. 75/
Answer:
U can’t convert a single number to a mixed number
Step-by-step explanation:
What do the variables in this problem stand for V=Bh
V=
B=
h=
Please help
For what values of k the relation R:{(k2 , 5), (3k, 6)} is not a function?
Explanation:
If you have repeated x values, then you wont have a function. For example, the points (1,5) and (1,6) mean we don't have a function since the input x = 1 leads to multiple outputs y = 5 and y = 6 simultaneously. For a function to be possible, we must have any input lead to exactly one output only.
What we do is set the x coordinates (k^2 and 3k) equal to each other and solve for k
k^2 = 3k
k^2-3k = 0
k(k-3) = 0 .... factoring
k = 0 or k-3 = 0 .... zero product property
k = 0 or k = 3
If k = 0, then (k^2,5) becomes (0,5). Also, (3k,6) becomes (0,6). The two points (0,5) and (0,6) mean the graph fails the vertical line test.
Similarly, if k = 3, then (k^2,5) becomes (9,5) and (3k,6) = (9,6). Another vertical line test failure happens here to show we don't have a function.
Can anyone help? I will mark you as brainliest!
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First calculate the area of the field using this equation:
area = (a+b)/2 x h
Substitute the values in:
area = (210 + 190)/2 x 250
area = 50000 m^2
Calculate how many hectares this is:
50000/10000 = 5
This is 5 hectares
Multiply this by the number of kg per hectare
5 x 7200 = 36000
It would produce 36000 kg
Have A Nice Day ❤
Stay Brainly! ヅ
- Ally ✧
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Can someone answer 32 points
Answer:
a= 3/4
Step-by-step explanation:
2/3 x 3/4- 1/6 = 1/3
a new school has a teacher to student ratio is 2:15. the school has 42 teachers. how many students are there in the school?
Answer:
315
Step-by-step explanation:
42÷2 = 21
2×21 = 42
So, 15×21 = 315
315÷21 = 15
Answer:
315
Step-by-step explanation:
42÷2 = 21
2×21 = 42
So, 15×21 = 315
315÷21 = 15
A recipe needs 4/5 cups of butter for every 2 cups of flour. If you plan to use 3 cups of flour, how much butter will you need?
Answer:
1 1/5 cups of butter
Step-by-step explanation:
4/5=2
=3
4/5 x 3=12/5
12/5 / 2
12/5 x 1/2=1 1/5
Which is the graph of x^2/9-y^2/4=1
Answer: A (top left box)
Step-by-step explanation:
If 3n – 2 = 10, then n = _______.
Answer:
n = 4
Step-by-step explanation:
[tex]3n-2=10\\3n=10+2\\3n=12\\n=12/3\\n=4[/tex]
I hope I helped you! Please mark me brainiest if I am correct. Thanks!
Answer:
n=4
Step-by-step explanation:
help me plzz!!!! thank you
Answer: The first one is 144 . The second one is C.
Step-by-step explanation:
Answer:
1) Full surface area = 156unit^2 this is correct.
lateral surface area = 144unit^2, this wasn't asked.
2) C = 528unit^2 is correct.
Lateral = 480unit^2 this wasnt asked.
Step-by-step explanation:
yes the next one is C 528
The formula for finding the surface area is the same for all right prisms and is: Surface area = 2B + hP. In this formula, B is the area of one of the bases, while h is the prism's height, and P is the perimeter of the base.
In effect;
step 1 = parallel sides indicate the bases of all triangular prism
step 2 = perimeter = 3+4+5 = 12
step 3 = LA = P x H = P x Length which is lateral height
LA = 12 x 12 = 144
step 4 = SA = 1/2 b x h (height of triangle) +LA
SA = 1/2 4 x 3 + LA
SA = 2 x 3 = 6 = 1 base + LA (+base)
SA = 6+6 = 12 + 144 = 156 = 2b+LA
IF you remember LA is perimeter x length of prism but label L as H then use little h for triangle h. You can remember.
39 less than the product of a number and 13 is 39
Answer:
13n - 39 = 39
Step-by-step explanation:
Let the number be n. Then we have 13n - 39 = 39
Geometry help please
Which set contains letters that all have rotational symmetry?
a.F, G, L, P
b.S, O, X, Z
c.A, M, T, O
d.H, I, J, X
Answer:
The answer is C- A, M, T, O