how to solve -3x-6y=3 and 2x+7y=-17 using elimination method PLEASE SHOW WORK
Find the ratio of Cos (39).
A. 37/7
B.X/7
C.7/X
D.7
Answer:
x/7
Step-by-step explanation:
cos 39= adjacent/hypotenuse
=x/7
Which is a perfect square?
6^1
6^2
6^3
6^5
Answer:
6^2
Step-by-step explanation:
6^2 because,
6^1 is not a perfect square because 6 is its own number because 6 x 1 =6 Therefore being eliminated.
6^3 is not a perfect square because 6 x 6 x 6 (216) is cubed not square
*This one almost tricked me*
6^5 is not a perfect square because 6 x 6 x 6 x 6 x 6 (7776) it isn't an equal factor combination, that when multiplied together, produce the number 7,776. That means 7,776 is not a perfect square.
6^2 is a perfect square because 6x6= 36 and 36 is a perfect square.
Therefore, its 6^2
(This is my 100th question answered!)
Hope this helps have a nice day!
NEED HELP ASAP
Which is a different way to express 5r?
5+r
2r+3r
r5
3r⋅2r
Answer:
2r+3r
Step-by-step explanation:
even though r5 looks correct, you always have to put the varible on the right side of a number. 2r+3r is correct because if you combine like terms, you get 5r
Pretty please HELP MEEEE A circular flower bed is 19 m in diameter and has a circular sidewalk around it that is 3 m wide. Find the area of the sidewalk in square meters. Use 3.14 for pi.
SA is the area of flowerbed
radius is 9.5 m (diameter, 19, divided by 2)π(r)²3.14(9.5)²3.14(90.25)SA = 283.385 m²LA is the large area of both flowerbed and sidewalk together
Adding 9.5 and 3 together, the total radius is 12.5 mπ(r)²3.14(12.5)²3.14(156.25)LA = 490.625 m²Subtract SA from LA in order to find teh area of sidewalk.
A = 283.385 - 490.625 = 207.24 m²
ANSWER: 207.24 m² is the area of the sidewalkFind the volume of the cylinder
Answer:
pi 50 x^4
Step-by-step explanation:
The volume of a cylinder is
V = pi r^2 h
The radius is 5x and the height is 2x^2
V = pi (5x)^2 * 2x^2
V = pi ( 25x^2) (2x^2)
= pi 50 x^4
Answer:
[tex]50\pi x^{5}[/tex]
Step-by-step explanation:
50π[tex]x^{5}[/tex]
Complete the missing parts of the table for the following function. y = x
5
| -2 | -1 | 0 | 1 | 2 | 3 |
|________________
| 1/25 | 1/? | 1 | 5 | ? | ? |
Answer:
The function is:
y = [tex]5^x[/tex]Missing numbers:
x = -1 ⇒ y = 1/5x = 2 ⇒ y = 25x = 3 ⇒ y = 125A room has a measurement of 7.5 m x 9.6 m. If Encik Zaki wishes to lay square tiles
on the floor of the room, what is the biggest size, in cm, of the tiles so that the tiles
will fully cover the entire floor?
Answer:
72
Step-by-step explanation:
A regular hexagon is inscribed in a circle with a diameter of 8 inches.
a. What is the perimeter of the hexagon?
b. What is the area of the hexagon?
Step by step please!!!
Answer:
b) 41.6 square inches
Step-by-step explanation:
A regular hexagon is inscribed in a circle with a diameter of 8 inches.
Step 1
We find the radius
Radius = Diameter/2
= 8 inches/2 = 4 inches
a. What is the perimeter of the hexagon?
b. What is the area of the hexagon?
An hexagon has 6 sides
The number of angles in an hexagon is calculated as:
[(Number of sides - 2) x 180]
= (6 - 2) x 180 = 720 ÷ 6 = 120°
The hexagon into 6 equilateral triangles with 4 for each of its sides.
The area of one of the triangles:
Height = 2√3
- one triangle's area = (1/2)bh = (1/2)(4)(2√3) = 4√3
The area of the hexagon by multiplying the one triangle's area by 6:
6 x 4√3 = 24√3 square inches
= 41.569219382 square inches
Approximately = 41.6 square inches
8. Which pair of lines must be parallel?
108°
84
106
72°
t
A. p and r
B. q and s
C. p and s
D. q and r
P 9
r
S
Answer:
A) p||r
Step-by-step explanation:
Answer:
q || r
Step-by-step explanation:
What is the solution of (x+8)/(5x+-1)>0?
Answer:
the solution set is (-infinity, -8) ∪ (-8, 1/5)
Step-by-step explanation:
x + 8 changes sign at x = -8.
I'll assume you meant 5x - 1 (as 5x+- is meaningless). 5x - 1 changes sign at x = 1/5.
Subdivide the x-axis using the two x-values found above:
(negative infinity, -8), (-8, 1/5), (1/5, infinity.
Choose a representative value from each interval. I'm choosing x = -10, x = 0 and x = 1.
Now test the given inequality at each of these x-values. Is the result true or false?
x + 8
---------- > 0
5x - 1
For x = -10:
-10 + 8
--------------- > 0 => -2/(-51) => 2/51 This is TRUE
5(-10) - 1
For x = 1:
1 + 8
---------- > 0 => 9/4 This is TRUE
5 - 1
For x = 0:
8
---------- > 0 This is FALSE
- 1
Therefore the solution set is (-infinity, -8) ∪ (-8, 1/5)
11 Resuelve los problemas desarrollados .
- Una persona depositó una cierta cantidad de
dinero en un banco que paga el 6.2% de inte
rés simple anual. Si al cabo de 10 años los
intereses ganados alcanzan los RD$ 19 840,
¿de cuánto fue el depósito realizado?
• ¿A qué porcentaje de interés fueron deposi-
tados RD$ 48 000.00 para que transcurridos
15 meses los intereses devengados sean de
RD$ 3 450.00?
¿En qué tiempo un capital de RD$ 72 475.00
depositado a una tasa de interés simple anual
de un 4% produce intereses de RD$ 36 237.50?
Step-by-step explanation:
Este ejercicio se puede hacer de dos formas, o bien pasas los días a años o calculas el interés simple diario.
Para pasar 89 días a años simplemente tenemos que dividir 89 entre 365 días, lo que nos da 0,243835616 años. Una vez tengamos todos los datos expresados en el mismo tiempo, podemos calcular el interés.
Interés simple ejercicio resuelto
Para pasar el interés simple de anual a diario hacemos lo mismo dividimos 4% entre 365 días. Dándonos el mismo resultado.
Ejercicio resuelto interés simple interés generado
Plssss help and thank you
Answer:
1
Step-by-step explanation:
The y-intercept is when x=0, and by looking at this chart, we can see that when x=0, y=1, therefore it will be (0,1) and your y-intercept is 1.
If p(t)=5t4+17t3–8t2+13t–12, use synthetic division to find p( – 4).
Answer:
the value of this function p(t) at t = -4 is also 0
Step-by-step explanation:
Recall that synthetic division in a problem such as this one returns a remainder, which is sometimes zero and is sometimes not. If not, then the remainder is the value of the given polynomial when evaluated at a given argument. We are to determine the remainder here when t = -4:
Setting up synthetic division:
-4 / 5 17 -8 13 -12
-20 12 -16 12
------------------------------------
5 -3 4 -3 0
Since the remainder is 0, the value of this function p(t) at t = -4 is also 0.
Why does everyone keep commenting links on my posts? Please stop, if you don’t know the answer then don’t comment :(
Answer:
Never go to these links! If you see someone answer a link report them!
Answer:
U can just report those comments .
Step-by-step explanation:
& then they will get deleted.
the cost of renting a van is $30. An additional $0.89 is charged for each mile, m, the van is driven, Which expression can be used to determine the total cost, in dollars, of renting a van?
Answer:
30 + 0.89m
Step-by-step explanation:
I think this is the correct answer.
brass is an alloy of zinc and copper. if 30% of the content is zinc . find the weight of zinc and copper in 300 gram of brass.
Step-by-step explanation:
Here's your solution
=> percentage of zinc = 30%
=> total weight of alloy = 300 gram
=> amount of zinc = (30/100)*300 = 90 gram
=> amount of copper = 300 - 90 = 210 gram
hope it helps
At Chill Hill, there are 540 ways to make an ice cream sundae consisting of one flavor ice cream, one topping, and one type of syrup. If there are 9 ice cream flavors and 5 types of syrup, how many toppings are there? Please Explain how you got this answer for brainliest
Answer:
12 different toppings
Step-by-step explanation:
Total combination / (number of syrup * Numbe rod ive cream flavors)
540 / (9*5)
540 / 45
= 12
ASAP need help please !!!!!!!!!!
Answer:
(16x) (4xy)
Step-by-step explanation:
Help pls I’m stuck on this question
Answer:
We have 15 Nickels and 10 Dimes.
Step-by-step explanation:
This is a system of equations! [Literally in a class reviewing that rn}
Lets make a chart:
Number of Coins x Value of Coin = Total Value
Dimes | d | 10 | 10d
Nickels | n | 5 | 5n
So, When you have a System of Equations with Money, One equations is about the value of the money, and the other about the number of coins.
The First Equation [Number of Coins]:
D + N = 25
the Second Equation [Value of Money]:
10D + 5N = 175
I will use Elimination to solve this, however, graphing and substitution works too.
ELIMINATION:
Multiply First equation by -5
-5[D + N = 25] = -5D - 5N = -125
Add the Two Equations vertically.
-5D - 5N = -125
10D + 5n = 175
---------------------
5D = 50
Divide both sides by 5.
5D/5 = 50/5
D = 10
Substitute D= 10 In any equation and solve for the other variable.
10 + N = 25
Subtract 10 from both sides.
10 - 10 + N = 25 - 10
N = 15
So, we have 15 Nickels and 10 Dimes.
==================================================================
Hope I Helped, have a Great Day!
-Aadi x
Rewrite in standard form. Find the center and radius of the circle. Show all of your work for full credit.
Where is the picture?
Can anyone solve this question??? plss plsss its my request to all if any one can solve this question I will mark him/ her the brainliest
Answer:
a) ∠EAB = 180° - 90° - 30° = 60°
∠EBA = 180° - 90° - 60° = 30°
a) ∠EBA = 30°
b) ∠DCA = 180° - 90° - 30° = 60°
∠EBA ≅ ∠DAC, ∠EAB ≅ ∠DCA, ∠AEB ≅ ∠CDA
ΔEBA ≅ ΔDAC because of the AAA postulate
c) EB ≅ DA, EA ≅ DC, AB ≅ CA
d) AB = CA given
sin ∠EAB = EB/AB (sin 60°) EB = (0.8660)AB
cos ∠EAB = EA/AB (cos 60°) EA = (0.5)AB
cos ∠DAC = AD/CA (cos 30°) AD = (0.8660)CA
sin ∠DAC = CD/CA (sin 30°) CD = (0.5)CA
ED = EA + AD
ED = (0.5)AB + (0.8660)CA
since AB = CA, ED = 1.366CA
since EB = (0.8660)AB and AB = CA, then EB = 0.866CA
since CD = 0.5CA,
EB + CD = 0.866CA + 0.5CA = 1.366CA
EB + CD = 1.366CA
1.366CA = 1.366CA
Proof: ED = EB + CD
What do you do to both sides to
r? What is r? 3/8 r = 6 HELP ME
Answer:
r = 16
Step-by-step explanation:
[tex]\frac{3}{8}r = 6 \\\\[/tex]
Multiply both sides by 8
[tex]8*\frac{3}{8}r = 6*8\\\\3r = 48\\[/tex]
Divide both side by 3
[tex]\frac{3}{3}r=\frac{48}{3}\\\\r = 16[/tex]
OR
Multiply both side by (8/3)
[tex]\frac{8}{3}*\frac{3}{8}r=6*\frac{8}{3}\\\\r = 2*8\\\\r = 16[/tex]
write an equation to represent the information in this problem. Jerel runs five days each week. on each of 4 days, he runs 2.3 km. if jerel runs a total of 14km, how many kilometers does he run on the fifth day?
Let x be the distance run on the fifth day
Total distance run on all the four days = 2.3 * 4 = 9.2 km
Required equation : x + 9.2 = 14
x = 14 - 9.2
x = 4.8 km
A number x divided by 6 is at least 16 .
Answer:
x = 96
Step-by-step explanation:
Answer:
x/6≥16
Step-by-step explanation:
please help me to solve this question please
Answer:
volume of wooden blocks= 2³=8 cm³
volume of cubic box= 8³=512 cm³
512/8= 64
64 blocks could fit in a cubic box
No: of wooden blocks she wants to fit= 70
she'd not be able to fit all the wooden blocks into the box
Step-by-step explanation:
Answer:
No, cannotStep-by-step explanation:
Side of the small block is 2 cm
The volume of a small block is:
V = 2³ = 8 cm³The cubic box with side 8 has volume:
V = 8³ = 512 cm³The blocks can fit inside:
512/8 = 64Since 64 < 70, Indra cannot fit all the blocks
can someone help my lil sister.
Answer:
78
Step-by-step explanation:
Given:
h + 9g
Required:
Evaluate when g = 8 and h = 6
Solution:
Plug in the values of the variables into the expression
Thus,
6 + 9(8)
= 6 + 72
= 78
Find the value of x.
9
19
x = [?]
Answer:
14
Step-by-step explanation:
Answer:
looks like 18 not sure tho
Step-by-step explanation:
6 more than a number
Answer:
como explica ebn yte ay uod y
Step-by-step explanation:
I NEED HELP NOW LIKE RIGHT NOW
Answer:
Hey! Answer: F
Step-by-step explanation:
13.5 ÷ 9= 1.5
18 ÷ 12 = 1.5
So our pattern is to enlarge/multiply it by 1.5
So 1.5 x 15 = 22.5
So F is our answer!
Two girls are standing 100 feet apart they both see a beautiful seagull in the air between them the angles of elevation from the girls to the bird are 20 degrees and 45 degrees respectively how high up is the seagull
Answer:
[tex]26.68\ \text{feet}[/tex]
Step-by-step explanation:
a = 100 feet
[tex]\angle B=20^{\circ}[/tex]
[tex]\angle C=45^{\circ}[/tex]
[tex]\angle A=180-(20+45)=115^{\circ}[/tex]
From sine rule we have
[tex]\dfrac{\sin B}{b}=\dfrac{\sin A}{a}\\\Rightarrow b=\dfrac{\sin B}{\sin A}a\\\Rightarrow b=\dfrac{\sin 20^{\circ}}{\sin 115^{\circ}}\times 100\\\Rightarrow b=37.73\ \text{feet}[/tex]
[tex]\sin C=\dfrac{h}{b}\\\Rightarrow h=b\sin C\\\Rightarrow h=37.73\times \sin 45^{\circ}\\\Rightarrow h=26.68\ \text{feet}[/tex]
The is seagull is [tex]26.68\ \text{feet}[/tex] above the ground.