Answer:
-42t + 24
Step-by-step explanation:
-6(7t-4)= -42t + 24
-6 x 7t = -42t
-6 x -4 = +4
9/10 ÷ 4/10 = ???????????
Answer:
2 1/4 or 9/4
Step-by-step explanation:
9/10÷4/10= 9/10*10/4
now simplify the 10
9/1 * 1/4= 9/4
now turn it into a mixed number
2 1/4
Answer:
2.25, 9/4 or 2 1/4
Step-by-step explanation:
y -3 = x
Pls explain thank u so much!!
Answer:
Y = x+3
Step-by-step explanation:
You want to start by figuring out how to get Y alone.
So to get it alone so you add +3 on both sides
Y - 3 = x
+3. +3
Positive 3 and Negative 3 cancel out making it zero.
Visual: 3 - 3 = 0
Since you cant take or add anything from x you leave it as + 3 so the answer should be.
Y = x + 3
I hope I could help :)
Using the diagram below, what is the length of PR (Please answer within 10 min it's on a time limit.)
Answer:
oof
Step-by-step explanation:
Question- What method would you happen to be using to solve this problem?
A screening test wished to improve the diagnostic ability to identify Zika-infected fetuses in pregnancy rather than after birth. A total of 330 pregnant women (carrying one baby each) in Miami were tested. A total of 36 babies had Zika; 24 of whom tested positive. A total of 300 babies tested negative for the virus. What is the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the test?
a. 94.5%
b. 33.3%
c. 66.7%
d. 96.0%
e. 98.0%
f. 80.0%
Answer:
Sensitivity = 66.7% (C)
specificity= 98.0% (E)
positive predictive value = 80.0% (F)
Negative predictive value = 96.0% (D)
accuracy of the test = 94.5% (A)
Step-by-step explanation:
Given the data in the question;
Disease Present Disease Absent Total
Test Positive 24 6 30
Test Negative 12 288 300
Total 36 294 330
so A = 24, B = 6, C = 12 and D = 288
sensitivity = [A/(A+C)]×100 = [24/(24+12)]×100 = [24/36]×100
Sensitivity = 66.7% (C)
specificity= [D/(D+B)]×100 = [288/(288+6)]×100 = [288/294]×100
specificity= 98.0% (E)
positive predictive value = [A/(A+B)]×100 = [24/(24+6)]×100
= [24/30]×100
positive predictive value = 80.0% (F)
Negative predictive value = [D/(D+C)]×100 = [288/(288+12)]×100
= [288/300]×100
Negative predictive value = 96.0% (D)
accuracy of the test = [A+D/(A+B+C+D)]×100 = [24+288/(24+6+12+288)]×100
= [312/330]×100
accuracy of the test = 94.5% (A)
Nothing 33.3% (B)
which expression is equivalent to 2(3 - x) - 12 + 4x
3x - 6
3x - 7
2x - 7
2x - 6
CEOLATIONS AND INEQUALITIES
Finding angle measures of a triangle given angles with variables
In the triangle below, suppose that m U=(x+9)°, m = (2x+1), and mW=(7x)".
Find the degree measure of each angle in the triangle.
Answer:
seventeen degrees(17⁰)
how many times the size of 0.81 is 810
Answer:
810 is 100 times the size of 0.81
Lindsay invest $250 in a bank account that pays 3% interest each year how much money will be in her account after one year?
is 71.08 greater than 71.106
Answer:
no, 71.106 is greater
Step-by-step explanation:
71.08= 71 and 8/100
71.106= 71 and 10/100
71.106's fraction is larger
Find the measure of angle KLH pls help
Richie is planting a rectangular garden with a perimeter of 39 feet. The length is twice the width. Find the dimensions of the garden
Answer:
l=13 ft
w=6.5 ft
Step-by-step explanation:
a rectangular garden would have 4 sides
two of the sides are x feet long
and the other two sides are 2x feet long
therefore
x+x+2x+2x=39
which is the same as saying
6x=39
divide both sides by 6 to get
x=6.5
so the width is 6.5 feet and the length is twice that or 13 feet
Help
Don’t use for points or will take it back
Answer:
134=2x
X= 67
hope it helps
can someone help this is kinda confusing i’ll mark you as brainlilest.
Answer:
The answer is A, good luck on the test! :D
Step-by-step explanation:
Answer:
Step-by-step explanation:
A. In geometry, a cylinder is a three-dimensional shape with a circular base, ... So using the volume of cylinder formula we can find the volume of i
In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $33 and a standard deviation of $16. Construct a confidence interval at a 98% confidence level.
Give your answers to one decimal place
Answer:
The margin of error is 5. 00
solve and recieve brain list I took a better picture
What is the measure of m∠A
Step-by-step explanation:
x+2x+6x=180
9x=180
x=20°
m<A = 20°
If mZ1 is 68º and m23 is (3x - 7)º, what is x?
Answer:
im sooooo confused
Step-by-step explanation:
Find the equation of the exponential function represented by the table below:
Answer:
[tex]y =5(3)^x[/tex]
Step-by-step explanation:
Given
The attached table
Required
Determine the equation of the table
The table represents an exponential function. So, we make use of
[tex]y = ab^x[/tex]
When x = 0, y= 5.
So:
[tex]y = ab^x[/tex] becomes
[tex]5 = ab^0[/tex]
[tex]5 = a*1[/tex]
[tex]5 = a[/tex]
[tex]a = 5[/tex]
When x = 1; y = 15
So;
[tex]y = ab^x[/tex] becomes
[tex]15 = a * b^1[/tex]
[tex]15 = a * b[/tex]
Substitute 5 for a
[tex]15 = 5 * b[/tex]
Divide both sides by 5
[tex]\frac{15}{5} = \frac{5 * b}{5}[/tex]
[tex]3 = b[/tex]
[tex]b = 3[/tex]
Substitute values for a and b in: [tex]y = ab^x[/tex]
[tex]y =5(3)^x[/tex]
solve each equation for given variable
- 12 = 6i- 6
1-5 PLEASE SHOW WORK!! I will mark brainliest and a lot of points!!
Answer:
Step-by-step explanation:
2. -x+4+3x+2=2x+6
3. -x-2-4x-3=-5x-5
4.-36-24=-60
5. 9+10-6-6=7
random khan question and I haven't done this in a year, I'm struggling.
Answer:
Add maybe
Step-by-step explanation:
add the 500+400+200 try that hope it helps have a great day
Solve the system of equations by substitution. 3/8x + 1/3y = 17/24
Answer:
this question is not complete. need another equation
Step-by-step explanation:
give another equation then I can solve
[tex] \frac{3}{8} x = \frac{17}{24} - \frac{1}{3} y \\ x = \frac{17}{9} - \frac{8}{9} y[/tex]
Give a list with six different numbers with median 24 where the mean is smaller than the median. State the
mean of your list of numbers.
A right triangle has side 32 and hypotenuse 68 use the Pythagorean theorem to find the length of the third side?
Answer:
Step-by-step explanation:
x is the third side
x² + 32² = 68²
x² = 68² - 32² = 3600
x = √3600 = 60
Solve the inequality for x.
X-3/4>=-1/8
Simplify your answer as much as possible
[tex]x - \frac{3}{4} \geqslant - \frac{1}{8} [/tex]
Solve the Inequality for x-term.[tex]x \geqslant - \frac{1}{8} + \frac{3}{4} [/tex]
Make both fractions to have same denominators by multiply 2 in 3/4 for both numerator and denominator.
[tex]x \geqslant - \frac{1}{8} + \frac{3 \times 2}{4 \times 2} \\ x \geqslant - \frac{ 1}{8} + \frac{6}{8} \\ x \geqslant \frac{5}{8} [/tex]
Hence, the solution is, "x is greater or equal to 5/8."
Answer[tex] \large \boxed{x \geqslant \frac{5}{8} }[/tex]
Find the measure of CD.
Round to the nearest tenth.
mCD=[?]degrees
Answer:
m(arc CD) = 14.1 cm
Step-by-step explanation:
Measure of an arc of the circle = [tex]\frac{\theta}{360}(2\pi r)[/tex]
Here 'r' = radius of the circle
θ = Angle subtended by the arc at the center of the circle
From triangle OED,
sin(∠EOD) = [tex]\frac{ED}{OD}[/tex]
sin(∠EOD) = [tex]\frac{\frac{12.7}{2}}{9.06}[/tex]
= [tex]\frac{6.35}{9.06}[/tex]
= 0.7
m∠EOD = 44.498
≈ 44.5°
Angle subtended by the arc CD at the center = m∠COD
= 2(44.5)
= 89°
m(arc CD) = [tex]\frac{89}{360}(2\pi)(9.06)[/tex]
= 14.07
≈ 14.1 cm
Find all values of k, if any, that satisfy the equation (in attachment). Enter the exact answer(s).
Compute the rightmost product:
[tex]\begin{bmatrix}1&2&0\\2&0&4\\0&4&-1\end{bmatrix}\begin{bmatrix}2\\2\\k\end{bmatrix}=\begin{bmatrix}1\times2+2\times2+0\times k\\2\times2+0\times2+4\times k\\0\times 2+4\times2+(-1)\times k\end{bmatrix}=\begin{bmatrix}6\\4k+4\\8-k\end{bmatrix}[/tex]
Then
[tex]\begin{bmatrix}2&2&k\end{bmatrix}\begin{bmatrix}6\\4k+4\\8-k\end{bmatrix}=2\times6+2\times(4k+4)+k\times(8-k)=-k^2+16k+20[/tex]
Use whatever methods you like to solve the remaining quadratic equation:
-k ² + 16k + 20 = 0 → k = 8 ± 2√21
x = y+2
x+4y=7
Please help!
answer plz this is on khan academy
Answer:
A
Step-by-step explanation:
This graph represents the inequality x < 2. you may be confused as to why the answer is not x ≤ 2, but the circle at the start of the line is not shaded in. This tells us that an answer to this inequality cannot be x
Someone please help me!!:(