Answer:
34
Step-by-step explanation:
40 * 0.85 = 34
34 questions answered correctly
Hey there,
85% = [tex]\frac{85}{100}[/tex] = 0,85
0,85 x 40 = 34
The student answered 34 questions correctly.
:)
Write the expanded form of the expression.
6(3x - 7)
A box has 640 nails. Each model boat needs 8 nails to hold it together. How many model boats can be made?
A washer and a dryer cost $1024 combined. The washer cost $74 more than the dryer. What is the cost of the dryer
Answer:
Let the dryer cost x.
Then, the washer costs (x+87)
Together, they cost (x) + (x+87) = 787
2x+87 = 787
2x = 700 [subtract 97 from both sides]
x = 350 [divide both sides by 2]
The dryer cost $350.
Check: The washer cost $437. Together, they cost $787 [good to check, right?]
Step-by-step explanation:
hope it's help!!!
If A= ("-2" 6 1) (1 9 "-6)" ("-9" 9 "-9)" and B= ("-5" 9 6) (-2 "-7" 4) (1 10 "-1)," find "-4A" + 6B
(a) 0.893467 rounded to the nearest hundred-thousandth is
Answer
0.89347
.................
Elissa is readiing a 627 page book She has reached page 239
How many pages does she have ot read before finishing the book?
Answer :
388 Pages Left
Explanation : 627 - 239
◊ YusuCr ◊
Need help fast Real fast What is the area
Answer:
508
Step-by-step explanation:
23 * 13 = 299
19 * 11 = 209
299+209=508
Write the whole number as an equivalent fraction with the given denominator.
5= /4
Answer:
20/4
Step-by-step explanation:
5 = x/4
mulitply both sides by 4
x = 20
so the fraction is 20/4
Find the measure of each acute angle of right triangle ABC with m
Answer:
The value of the angles are 38° and 52° respectively
Let the acute angles be represented by a and b.
Based in the information given,
a = 2(b - 12)
a = 2b - 24.
Note that the angle in an acute angle equals to 90°.
Therefore,
a = 90 - b.
a = 2b - 24
Equate the equations together
90 - b = 2b - 24
2b + b = 90 + 24
3b = 114
b = 114/3
b = 38
Therefore, a will be:
= 90° - 38° = 52°
The value of the angles are 38° and 52° respectively.
Step-by-step explanation:
Answer:
38 52
Step-by-step explanation:
Which of the following sets of numbers between 12 and 20 contains only prime numbers .
Answer:
13, 17, 19
Step-by-step explanation:
Go through (12-20) and find the multipliers for each number.
13 = 13 x 1
14 = 7 x 2 , 14 x1 = no
15 = 5 x 3, 15 x 1 = no
17 = 17 x 1
18 = 6 x 3, 9 x 2, 18 x 1 = no
19 = 19 x 1
Khan academy
Please need help
Answer:
-3<x<-2
Step-by-step explanation:
In the graph you can see that from x=-3 to x=-2, the graph is below the x axis, meaning that it is below zero. none of the other options are below zero at their respective ranges, so that's your answer
A ream of paper containing 500 sheets is 5 cm thick. How many sheets of this type of paper would there be in a stack 7.5 cm high?
Answer:
The answer is 5.80 cm high
An Isosceles Triunde
has legs measure
3x^4 - 6x-1 unit.
The Perimeter of the
triangle is
7x^4 - 3x^3-x-6
Find the Base.
Answer:
base = [tex]x^4 - 3x^3+11x-4[/tex]
Step-by-step explanation:
An isosceles triangle has 2 sides of equal length (a) and base (b)
⇒ perimeter of an isosceles = 2a + b
Given:
[tex]\textsf{leg (a)}=3x^4 - 6x-1[/tex] [tex]\textsf{perimeter}=7x^4 - 3x^3-x-6[/tex][tex]\implies \textsf{perimeter}=2a+b[/tex]
[tex]\implies 7x^4 - 3x^3-x-6=2(3x^4 - 6x-1)+b[/tex]
[tex]\implies 7x^4 - 3x^3-x-6=6x^4 - 12x-2+b[/tex]
[tex]\implies x^4 - 3x^3+11x-4=b[/tex]
Therefore, base = [tex]x^4 - 3x^3+11x-4[/tex]
Answer:
Perimeter=sum of sides
Let base be y[tex]\\ \tt\longmapsto 3x^4-6x-1+3x^4-6x-1+y=7x^4-3x^3-x-6[/tex]
[tex]\\ \tt\longmapsto 6x^4-12x-2+y=7x^4-3x^3-x-6[/tex]
[tex]\\ \tt\longmapsto y=x^4-3x^3+11x-4[/tex]
how to factor x^3 + x - 4 = 0
Answer:
X = 1.378797
Step-by-step explanation:
However, the following root(s) were found by numerical methods.
X = 1.378797
PLEASE HELP I'LL GIVE ANYTHING
simplify the expression
60m - 15 (4 - 8m) + 20
Answer:
180m-40
Step-by-step explanation:
60m- 60 + 120 +20
=180m-40
180m-40
Step-by-step explanation:
if right please brainliest
In the figure below, angles ACB and ANC are right-angles. What is the 10cm area of AABC?
A 24 cm²
B 37.5cm²
C 40cm²
D 75 cm²
Answer:
area of ΔABC = 48 cm²
Step-by-step explanation:
We have been provided with height of 6 cm and have to find base.
using Pythagoras theorem:
a² + b² = c²
a² + 6² = 10²
a² = 100 -36
a² = 64
a = √64
a = 8
Area of both triangles:
[tex]\frac{1}{2}[/tex] * base * height
[tex]\frac{1}{2}[/tex] * 8 * 6
24 cm²
area of both triangles: 24 cm² * 2 = 48 cm²
Apply Pythagorean theorem
[tex]\\ \tt\hookrightarrow AN^2=10^2-6^2[/tex]
[tex]\\ \tt\hookrightarrow AN^2=8^2[/tex]
[tex]\\ \tt\hookrightarrow AN=8cm[/tex]
AB=2(8)=16cmArea
[tex]\\ \tt\hookrightarrow \dfrac{1}{2}bh[/tex]
[tex]\\ \tt\hookrightarrow \dfrac{1}{2}(16)(10)=8(10)=80cm^2[/tex]
Required area:-80/2=40cm^2
The ABC Book club charges $40 monthly fee, plus $2 per book read in that month. The east book club charges a $35 monthly fee, plus $3 per book read in that month. For each club, how many y books must be read in 1 month for the total charges from each club to be equal
1
2
4
5
6
75
Please help on this question I don’t understand it f(x)=(x1/5-7)^7 please
Answer:
Step-by-step explanation:
B. maybe i think that but sorry I'm just using mental math
The amount of time it takes Hugo to solve a Rubik's cube is continuous and uniformly distributed between 4 minutes and 11 minutes. What is the probability that it takes Hugo less than 5 minutes given that it takes less than 6 minutes for him to solve a Rubik's cube?
The probability that it takes Hugo less than 5 minutes is 25%.
ProbabilityGiven that the amount of time it takes Hugo to solve a Rubik's cube is continuous and uniformly distributed between 4 minutes and 11 minutes, to determine what is the probability that it takes Hugo less than 5 minutes given that it takes less than 6 minutes for him to solve a Rubik's cube, the following calculation must be performed:
100 / 8 = 12.512.5 x 2 = 25Therefore, the probability that it takes Hugo less than 5 minutes is 25%.
Learn more about probability in https://brainly.com/question/795909
please help asap!! 20 points
3*f(-4)-3*g(-2)
Answer:
-27
Step-by-step explanation:
By inspection of the graph
f(-4) = -3
g(-2) = 6
Therefore, 3 · f(-4) - 3 · g(-2) = (3 x -3) - (3 x 6) = -27
What is the equation of the line that passes through the points (1, 1) and (7, -5)?
Answer:
y = -1x+2
Step-by-step explanation:
(1,1)(7,-5)
y2-y1/x2-x1 = slope
-5-1/7-1 = -6/6= -1
y-y1 = slope(x-x1) // equation formula
y-1=-1(x-1)
y = -1x + 1 +1
y = -1x+2
100 points consider the function below -2|x-3|+1 = -2sqrtx-1
Answer:
D. x = 1.7 or x = 5.7
Step-by-step explanation:
The left side of the equation is graphed in blue. The right side of the equation is graphed in red.
The solution of the equation is the x (and y) that make both equations true.
On the graph these solutions are the points where the two graphs intersect.
Those two points have x values that are positive (and y's that are negative) Only answer D. has x-values that correspond to the x-values of the points of intersection.
Answer:
D. x ≈ 1.7 or x ≈ 5.7Step-by-step explanation:
The solution is the x-coordinate of the intersection of the graphs (blue line and red curve).
The points are:
x close to 2 and close to 6Correct choice is D
explain why the product of one positive factor less than 1 and one factor greater than 1 is between both factors
Answer:
because the force of attraction is greater than one
Find an equation of the tangent line to y = 2e^x sec(x) at x = pi/4
Answer:
y = 6.20 + 12.4(x - pi/4)
Step-by-step explanation:
dy/dx = 2e^x secx + 2e^x secx * tanx= 2e^x secx (1 + tanx)
At x = pi/4, use sec(pi/4) = [tex]\sqrt{2}[/tex]. tan(pi/4) =1
so dy/dx = 2e^(pi/4) * [tex]\sqrt{2}[/tex] * (1 + 1) = [tex]4 \sqrt{2} e^{\pi/4}[/tex] ≈ 12.4 (This is the slope of the tangent line)
When x = pi/4, y = 2e^(pi/4) * [tex]\sqrt{2}[/tex] = [tex]2 \sqrt{2} e^{\pi/4}[/tex]= 6.20
Then the equation of the tangent line is
y = 6.20 + 12.4(x - pi/4)
Find the equation of the line parallel to y = 3x - 2 that passes through
the point (4.8) in slope-intercept form.
Answer:
y = 3x - 4
Step-by-step explanation:
a line parallel to another will have the same slope, just a different y-intercept or b-value. Using this, we suggest the equation of the question [tex]y = 3x + b\\[/tex], as we can solve for b. The point (4,8) was given, which means that an input of 4 as x returns 8 as y. Thus, [tex]8 = 3(4) + b[/tex]. Solving this gains b = -4
Timmy gets 1/3
the profit of
every sale that
he makes, selling
candy. If he
made $45, how
much money did
his sales earn?
Answer:
15
what is 1/3 it's 3 right so $45 is going to be divided by 3 so 45÷3 which is equals to 15
Gavin has $20 to spend at an arcade. He spends $8.75 on lunch and plans to use the rest of his money on game tickets. Each game ticket costs $1.25. The inequality 1.25t+8.75 ≤20 can be used to find t, the number of game tickets Gavin can buy. What is the solution to this inequality?
Answer: 9 tickets
Step-by-step explanation: you have to subtract the $8.75 from lunch and then divide it by $1.25 to see the maximum quantity of tickets he can purchase with his remaining money
I need the answer to this question please.
The value of sin2 Θ is in the 4th quadrant is -24/25
Explanation:
Given the expression of cosΘ= 3/5 with Θ in quadrant 4;
According to SOH, CAH TOA;
cosΘ= adjacent/hypotenuse
Get the opposite
5² = opp² + 3²
opp² = 25 - 9
opp² = 16
opp = 4
SinΘ = opp/hyp
SinΘ = 4/5
Sin2Θ = 2sinΘ cosΘ
Sin2Θ = 2(-4/5)(3/5)
Sin2Θ = -24/25
Hence the value of sin2Θ is in the 4th quadrant is -24/25
Please help me with this question
Answer:
8 cm
Step-by-step explanation:
V = 1/3 (Base Area) × h
216cm³ = 1/3(81cm²) × h
216cm³ = 27cm² × h
÷ 27cm ÷ 27cm
8 cm = h
I hope this helps!
A university is comparing the grade point averages of theater majors with the grade point averages of history majors. The university currently has 50 total theater majors and 50 total history majors. The mean and standard deviation for each population are shown in the table.
Theater Majors - (Population Mean 3.22 , Population Standard Deviation 0.002)
History Majors - (Population Mean 3.24 , Population Standard Deviation 0.08)
The university wants to test whether there is a significant difference in GPAs for students in the two majors. What is the P-value and conclusion at a significance level of 0.05?
Using the z-distribution, as we have the standard deviation for the population, we have that the correct option is:
The p-value is of 0.0772. Fail to reject the null hypothesis that there is no difference in the GPA's.
What are the hypothesis tested?At the null hypothesis, we test if there is no difference in the means, that is:
[tex]H_0: \mu_T - \mu_H = 0[/tex]
At the alternative hypothesis, we test if there is a difference, that is:
[tex]H_1: \mu_T - \mu_H \neq 0[/tex]
What is the distribution of the sampling distribution of sample differences?For each sample, we have that:
[tex]\mu_T = 3.22, s_T = \frac{0.002}{\sqrt{50}} = 0.00028284271[/tex]
[tex]\mu_H = 3.24, s_H = \frac{0.08}{\sqrt{50}} = 0.01131370849[/tex]
Hence:
[tex]\overline{x} = \mu_T - \mu_H = 3.22 - 3.24 = -0.02[/tex]
[tex]s = \sqrt{s_T^2 + s_H^2} = \sqrt{0.00028284271^2 + 0.01131370849^2} = 0.0113[/tex]
What is the test statistic?It is given by:
[tex]z = \frac{\overline{x} - \mu}{s}[/tex]
In which [tex]\mu = 0[/tex] is the value tested at the null hypothesis, hence:
[tex]z = \frac{\overline{x} - \mu}{s}[/tex]
[tex]z = \frac{0.02 - 0}{0.0113}[/tex]
[tex]z = -1.77[/tex]
What is the p-value and the decision?Using a z-distribution calculator, considering a two-tailed test, as we are testing if the mean is different of a value, with z = -1.77, it is found that the p-value is of 0.0772.
Since the p-value is greater than the significance level of 0.05, the correct option is:
The p-value is of 0.0772. Fail to reject the null hypothesis that there is no difference in the GPA's.
More can be learned about the z-distribution at https://brainly.com/question/13873630
Answer:
The P-value is 0.0772. Fail to reject the null hypothesis that there is no difference in the GPAs.