Answer:
120
Step-by-step explanation:
Here, we want to get the possible value of A
Now, we should understand that the value of an angle in triangle cannot be more than 180
Also, cosine can only be negative in the second and the 3rd quadrant
So,
arc cos (-0.5) = 120 , 300 , 60
But 60 is not correct as it will give a negative value
300 is not correct also as it is more than the angles present in a triangle
Thus, our answer is 120
what must be the value of a and b for PQRS to be a parallelogram?
Answer:
a = 2
b = 4
Step-by-step explanation:
In parallelogram opposite sides are equal.
4a + b = 2a + 8
4a - 2a + b = 8
2a + b = 8 -----------------(I)
b = 8 - 2a
11b - 10a = 6b
11b - 6b -10a = 0
5b - 10a = 0 ---------(II)
Substitute b = 8 - 2a in equation (II)
5*(8-2a) - 10a = 0
5*8 - 2a * 5 - 10a = 0
40 - 10a - 10a = 0
40 - 20a = 0
-20a = - 40
a = -40/-20
a = 2
Plugin a = 2 in equation (I)
2*2 + b = 8
4 + b = 8
b = 8 -4
b = 4
Expand the expression −11(3c−2d)
using the Distributive Property.
Answer:
-33c+22d
Step-by-step explanation:
=(−11)(3c+−2d)
=(−11)(3c)+(−11)(−2d)
This relation is an inverse variation. {(–1, 8), (4, –2), (–2, 4)} Which equation represents this relation?
Answer:
[tex]y = -\frac{8}{x}[/tex]
Step-by-step explanation:
Given
Inverse Variation:
[tex]Points: \{(-1, 8), (4, -2), (-2, 4)\}[/tex]
Required
Determine the equation of the relation
An inverse relation is represented as:
[tex]y = \frac{k}{x}[/tex]
Where k = constant of variation
Make k the subject:
[tex]k = xy[/tex]
When x = -1, y = 8
So, we have:
[tex]k = -1 * 8[/tex]
[tex]k = -8[/tex]
When x = 4, y = -2
[tex]k = 4 * -2[/tex]
[tex]k = -8[/tex]
When x = -2, y = 4
[tex]k= -2 * 4[/tex]
[tex]k = -8[/tex]
From above calculations, we've established that:
[tex]k = -8[/tex]
Substitute -8 for k in [tex]y = \frac{k}{x}[/tex]
[tex]y = \frac{-8}{x}[/tex]
[tex]y = -\frac{8}{x}[/tex]
Hence, the equation is:
[tex]y = -\frac{8}{x}[/tex]
Help I gotta minute left!
Step-by-step explanation:
D I believe the answer is
Keisha orders chicken alfredo for $9.99,
salad for $3.99, and a drink for $1.52. She
decides to leave a 10% tip for the waiter.
What will she owe total?
Help me out I gave Brainliest.
Answer:
8x+9y=3
Step-by-step explanation:
y=-8/9x+1/3
y=(-8x+3)/9....LCM
9y=-8x+3...cross multiple
9y+8x=3 OR
8x+9y=3
What is the reciprocal of
8/5
Answer:
0.025
Step-by-step explanation:
Answer: 0.025
Step-by-step explanation:
Pls help.... i dont really know how to find this slope ;/
Answer:
a
Step-by-step explanation:
the answer is a because every week it shows (shows on the graph) that he is earning 6 dollars.
Answer:
A
Step-by-step explanation:
The formula for slope is [ y2-y1/x2-x1 ] and we can use the points (0, 0) and (5, 30) to solve.
30-0/5-0
30/5
6/1
6
Now that we know what the slope is, we can eliminate C and D.
This means that he saves around $6 per week. With this being said, we can eliminate B as well.
Best of Luck!
If 1 gram = 100 centigrams and 1 centigram = 10 milligrams, how many
milligrams are in 1.42 grams?
0.142
142
1,420
14,200
Answer:
1,420 milligrams
Step-by-step explanation:
We know there are 100 centigrams in 1 gram, and there are 10 milligrams in a centigrams. That would mean there are 1,000 milligrams in 1 gram (100 * 10 = 1000).
As a result, all you need to do is multiply 1.42 by 1000 to get the amount of milligrams.
1.42 * 1000
Alternatively, to make 1.42 a whole number first, multiply by 100, then add a zero. (That's the other 10!)
(1.42 * 100) * 10
142 * 10
There are 1,420 milligrams in 1.42 grams.
Andrea works as a cashier in a music store. A customer wants to buy a CD that is
on sale for 15% off the regular price of $14.00. This means she will pay 85% of
$14.00. How much will Andrea pay?
Answer:
$11.90
Step-by-step explanation:
first you change the percent to a decimal by moving the decimal two places and then multiply.
you multiply .85 and 14.00= 11.90
Answer:
$11.9
Step-by-step explanation:
The regular cost of the CD = $14:00
The discount she gets = 15%
So, 15% of $14 = 2.1
= $14 - $2.1 = $11.9
Another method:
Or u can take 85% of $14 and u will get the immediately
85% of $14 = $11.9
Yoko needs 300 copies of her resume printed. Dakota printing charges 19.50$ for the first 200 copies and 9$ for every 100 additional copies. If the number of sets of 100 resumes is represented by r, express the cost of the resumes c(r) algebraically as a piecewise function How much will 300 copies cost, including a sales tax of 4 1/2%? Round to the nearest cent.
Answer:
A. c(r)=$19.5 if r < 2
c(r)=$19.5+(r-2) ($9) (1.045) if r ≥ 2
B. $29.78
Step-by-step explanation:
A. Based on the information given if we are to express the cost of the resumes which is c(r) algebraically as a piecewise function what we would have will be:
c(r)=$19.5 when r represent an INTERGER and is less than 2
c(r)=$19.5+(r-2) ($9) (1+0.045)
c(r)=$19.5+(r-2) ($9) (1.045) when r represent an INTERGER and is greater than 2
Therefore to express the cost of the resumes c(r) algebraically as a piecewise function will be: c(r)=$19.5 if r < 2
c(r)=$19.5+(r-2) ($9) (1.045) if r ≥ 2
B. Calculation for How much will 300 copies cost, including a sales tax of 4 1/2%
Cost of 300 copies=($19.5+$9)+($19.5+$9) (0.045)
Cost of 300 copies=$28.5+$28.5(0.045)
Cost of 300 copies=$28.50+$1.28
Cost of 300 copies=$29.78
Therefore How much will 300 copies cost, including a sales tax of 4 1/2% will be $29.78
What is the distance from (5,-5) to (-5,-5)?
Answer: 10
Step-by-step explanation:
which two whole number is 15/4 between? LOOK AT PICTURE
R is less than or equal to -9
R<_-9
Hope this helps
Multiply.
(8x+3)(-3x - 5)
Simplify your answer.
The perimeter of a right triangle is 60 feet and the area is 150 square feet. If the lengths of the sides of the triangle are each multiplied by 10, what is the perimeter of the new right triangle? A. 500 ft. B. 600 ft. C. 7120 ft. D. 8640 ft.
Answer:
B. 600 ft
Step-by-step explanation:
The formula for the Perimeter of a right triangle = Side a + Side b + Side c
The perimeter of a right triangle is 60 feet
If the lengths of the sides of the triangle are each multiplied by 10, what is the perimeter of the new right triangle?
Hence, the perimeter of the new right triangle = 10 × 60ft
= 600ft
Option B is the correct Option.
Answer:
600
Step-by-step explanation:
Someone help me !! Please
10 points
A pigeon flies for 7 hours at a speed of 70 km/h.
Calculate how far the pigeon flies.
Answer:
490km
Step-by-step explanation:
70km/hrs for 7hrs
so if the pigeon flies 70km in one hour we just have to multiply 70 by 7 to get 7hours.
70x7=490km
That means the pigeon flies 490km in 7hrs
Someone pls help me I’ll mark u brainliest
-7 + (-9) - (-11) -2
It’s cost $15 to send 3 packages through a certain shipping company. Consider the number of packages per dollar.
A. Find the constant of proportionality for this situation.
B. Write an equation to represent the relationship.
I think it is B not so sure but yea i think B sorry if I'm wrong
PLZ HELP ME I DONT UNDERSTAND
Answer:
7.5
Step-by-step explanation:
Which quotient shows the decimal placed correctly? A) 6÷0.5=1.2 B) 0.64÷2=3.2 C) 0.57÷5=0.114 D) 1.08÷0.3=0.36
Answer:
C) 0.57÷5=0.114
Step-by-step explanation:
Which quotient shows the decimal placed correctly?
Solving for each of the option
A) we are told that:6÷0.5=1.2
Hence: 6/0.5
= 12
Option A is wrong
B) we are told that: 0.64÷2=3.2
Hence: 0.64/2
= 0.32
Option B is wrong
C) we are told that: 0.57÷5=0.114
Hence: 0.57/5
= 0.114
Option C is correct
D) we are told that: 1.08÷0.3=0.36
Hence = 1.08/0.3
= 3.6
Option D is wrong
Therefore, option C is the only correct Option where the quotient shows the decimal placed correctly
Simplify the expression:
(5x6) (3x-2)=15xn. Find "n"
Answer:
[tex]\frac{6x-4}{x}[/tex]
Step-by-step explanation:
(5 x 6)(3x - 2) = 15xn
30(3x - 2) = 15xn
[tex]\frac{2}{1}[/tex] * (3x - 2) = ([tex]\frac{1}{2}[/tex]xn) * [tex]\frac{2}{1}[/tex]
6x - 4 = xn
n = [tex]\frac{6x-4}{x}[/tex]
You can't cross the 'x' out of the numerator or denominator because of the - 4 in the numerator.
Answer:
(3×2) (5×6)=15×n
Step-by-step explanation:
(5×6) (3×2)=15n
If £1 = $1.75, what is $19.25 in pounds?
Answer:
$19.25 ÷ $1.75 = (GBP)15.4
Step-by-step explanation:
HELPPP PLEASEEE!!! Write the equation in slope-intercept form of the line that passes through (6, -11) and is parallel to the graph of y=−2/3x+12. Show work
Answer:
y=-2/3x-7
Step-by-step explanation:
parallels have the same slope just different y ints
to find what the y int is i just graphed the point (6,-11) to a calculator and made an equation with a slope of -2/3 and plugged in different y ints to get this
Chick-fil-A has three drive-thru lanes. Depending on the day and time of day, they sometimes
close all or some of the lanes. Let the random variable X represent the number of lanes that
are open on a randomly selected time during the week. The table shows the probability
distribution of X.
Part (a): What is the probability that at least one lane is open at a randomly selected time?
Part (b): What is the expected value of number of open lanes at a randomly selected time?
Part (c): What is the probability that all three drive-thru lanes are open, given that at least one lane is open?
Part (d): Given that at least one drive-thru lane is open, would the expected value of the number of open lanes be less than, equal to, or greater than the expected value from part b?
Answer:
Pls remind me am in a test I'll come back
Problem 1: Tyler reads 2/3 of a book on Monday, 1/3 of it on Tuesday, 2/9 of it on Wednesday, and 3/4 of the remainder on Thursday. If he still has 14 pages left to read on Friday, how many pages are there in the book?
Answer:
180 pages
Step-by-step explanation:
Let
x = total number of pages
Monday + Tuesday + Wednesday
2/15x + 1/3x + 2/9x
= (6x+15x+10x)/45
= 31/45x
Thursday
x - 31/45x
= (45x-31x)/45
= 14/45x
3/4 of 14/45x
= 3/4 * 14/45x
= 42/180x
Total pages read = 31/45x + 42/180x
= (124x+42x)/180
= 166/180x
If he still has 14 pages left to read on Friday
Total read from Monday to Thursday + Friday
x = 166/180x + 14
x - 166/180x = 14
(180x-166x)/180 = 14
14/180x = 14
x = 14 ÷ 14/180
x = 14 × 180/14
x = 180 pages
solve x 3 to the second power =8
Answer:
It would be B
Step-by-step explanation:
8/3=2.66666666667
meaning x=8/3
What is the rate of this answer ??
Answer:
Option (4)
Step-by-step explanation:
Let the input output values of the table are represented by the equation,
y = mx + b
Here m = rate
b = y-intercept
Since, at x = 0, y = -1 [Point given in the table]
y-intercept 'b' = 0
Rate = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Where [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] are two points given in the table.
If the points are (-2, -5) and (-1, -3),
Substitute the values in the formula,
Rate = [tex]\frac{(-5)-(-3)}{(-2)-(-1)}[/tex]
= [tex]\frac{-5+3}{-2+1}[/tex]
= 2
Therefore, Option (4) will be the answer.
