Answer:
2x-y=8
(3x-y=17)*_1
2x-y=8
-3x+y=-17
#-x=-9, x=9 & y=-10
Answer:
x = 9 and y = 10
Step-by-step explanation:
Subtract the second equation from 1 as in doing so the y will get cancelled as they are of the opposite sign.
2x - y = 8
-3x + y = -17
-----------------
- x = - 9
Therefore,
x = 9
Now we will add the value of x to any of the equation from the question.
2x - y = 8
2(9) - y = 8
18 - y = 8
Therefore,
y = 10
Use the discriminant to describe the roots of each equation. Then select the best description. 3x^2 - 10 = 0
A. Real and Rational Roots
B. Non-Real Roots
C. Double Root
D. Real and Irrational Roots
Figure 1 shows a paperweight made from a hollow hemisphere and a hollow cone. The paperweight contains sand so that the sand exactly fills the hemisphere. The radius of the hemisphere is equal to the radius of the base of the cone. The height of the cone is 15cm and the volume of the cone is 180π cm3 Figure 2 below shows the paperweight after it has been turned upside down. Diagram NOT accurately drawn h cm Figure 2 The height of the sand in the cone is h cm. Find, to 3 significant figures, the value of h.
Answer:
13.95 cm
Step-by-step explanation:
the volume of the cone =
⅓× π r². h = 180 π
⅓×π r²×15 = 180 π
(eliminate π)
=> 5r² = 180
r² = 180/5 = 36
r=√36 = 6 cm
the volume of the sand = ½×4/3 π r³
= ⅔× π ×6³ = 144π cm³
the ratio of the volume :
144π/180π = 0.8
so the value of h = ³√0.8 x 15 = 0.93× 15
= 13.95 cm
Which angle is congruent to 5?
Answer:
Angle #4
Step-by-step explanation:
4 & 5 are equal, and opposite.
1 & 2 are also congruent by this standard.
Plss help I don't understand A circle has a diameter that extends from (2,6) to (-6,-8). What are the coordinates the
center of the circle
Answer:
(-2, -1)
Step-by-step explanation:
The centre of a circle is located at the mid-point of any diameter, hence we take the average of the coordinates of the end-points.
Cx = (2-6)/2 = -2
Cy = (6-8)/2 = -1
So the centre is located at (-2, -1)
Select the correct difference.
5 d2 + 4 d - 3 less 2 d2 - 3 d + 4
7 d2 + 7 d - 7
3 d2 - 7 d - 7
3 d2 + 7 d - 7
7 d2 + d + 1
Answer:
+ 7 d - 7
7 d2 + d + 1
Step-by-step explanation:
+ 7 d - 7
7 d2 + d + 1
You spin a spinner with 9 equal spaces numbered 1 through 9. What is the probability that the spinner lands on a 5 or a multiple of 3? I HAVE 5 MINS
Answer:
4/9
Step-by-step explanation:
The probability that the spinner lands on a 5 or a multiple of 3 will be 0.4444 or 44.44%.
What is probability?Its basic premise is that something will almost certainly happen. The percentage of favorable events to the total number of occurrences.
You spin a spinner with 9 equal spaces numbered 1 through 9.
Then the probability that the spinner lands on a 5 or a multiple of 3 will be
The total number of the event will be
Total events = 9
The favorable event will be
Favorable = 1 {5} and 3 {3, 6, 9}
Then the probability will be
P = 1/ 9 + 3/ 9
P = (1 + 3) / 9
P = 4/9
P = 0.4444
P = 44.44%
More about the probability link is given below.
https://brainly.com/question/795909
#SPJ2
Which of the following represents the factorization of the polynomial function graphed below?
Answer:
C is the answer of this question
Helpppp plz
What is the value of x?
Answer:
answer:
(x+34)+(2X+2)=180
3X+36=180
X=72
Step-by-step explanation:
Math help please show work thanks so much
Answer:
1.1+2. =3
2.1+2+3 =6
3.1+2+3+4 =10
4.1+2+3+4+5=15
5.1+2+3+4+5+6=21
6.1+2+3+4+5+6+7=28
triangle numbers
Answer:
Step-by-step explanation:
Diagram (n) Number of circles ([tex]T_n[/tex])
1 3
2 6
3 10
4 15
5 21
6 28
Pattern:
[tex]T_n = \frac{(n+1)(n+2)}{2}[/tex]
Where n = diagram number,
OR
Diagram Number of circles
1 1 + 2
2 1 + 2 + 3
3 1 + 2 + 3 + 4
4 1 + 2 + 3 + 4 + 5
5 1 + 2 + 3 + 4 + 5 + 6
6 1 + 2 + 3 + 4 + 5 + 6 + 7
n 1 + 2 + 3 + 4 + 5 + . . . + (n + 1)
Help me to do this question plz
I will make you as brainlist
Answer:
I don't understand the language but I can do it
someone pls answer this.
Answer:
Step-by-step explanation:
25 points!! Question #2 Line I passes through the points (-4.-7) and (23) on the coordinate plane Line m passess through the points (-4,1) and (2,w). For what value of w is line m parallel to line I
11
-3
4
1
Answer:
it will be -3
Step-by-step explanation:
[tex]\green{hello} [/tex]
-3 is the correct option
Use the coordinates of the labeled point to find a point-slope equation of the
line.
(-2,-5)
A. y + 5 = -2(x + 2)
B. y + 5 = 2(x + 2)
C. y - 5 = 2(x - 2)
D. y - 5= -2(x - 2)
Hey can someone please help me?
I need to show work too :(
Answer:
a ≈ 14.39
Step-by-step explanation:
7² + a² = 16²
49 + a² = 256
49 - 49 + a² = 256 - 49
a² = 207
√a² = √207
a = 14.3874945699
a ≈ 14.39
Please help.
What is the area of triangle ABC?
Answer:
C
Step-by-step explanation:
Answer:C
Step-by-step explanation:
how do i answer on the subjects
Answer:There is a button that says answer you click on answer and then give the answer and then once your finished click the green button on top that says add your answer.
Step-by-step explanation:
Answer:
---
Step-by-step explanation:
Either you can click on the "answer" button on the question in main menu, or you can click on the question, and then click the "add your answer" button.
---
hope it helps
With a 20% discount, Ella was able to save $40 on a dress. What was the original price of the dress?
Y'all I need help no links please will mark brainliest
The figure shows Triangle ABC and some of its transformed images on a coordinate grid:
A coordinate plane is shown. Triangle ABC Is formed by the points 2 commas 5, 2 comma 3, and 4 commas 3. Triangle 2 is formed by the points negative 3 commas 5, negative 3 commas 3, and negative1 comma 3. Triangle 1 is formed by the points negative 4 commas 5, negative 4 commas 3, and negative 6 commas 3. Triangle 3 is formed by the points negative 6 commas 2, negative 4 commas 2, and negative 4 commas 0. Triangle 4 is formed by the points 2 commas negative 1, 4 commas negative 1, and 4 commas negative 3.
Which of the four triangles was formed by a translation of Triangle ABC?
1
2
3
4
Answer:
Triangle 2
Step-by-step explanation:
The translation is a type of transformation, where the figure is just translated or simply moved from its original place.
The figure is not rotated or dilated but simply moved.
Here, we can see that only figure or triangle 2 is like the triangle ABC. Other triangles have undergone other transformations.
So, the correct answer is triangle 2.
~Hope this helps~
Which is odd one out? Explain how you know?
15,000 ones 1,500 tens 15 thousands 15,000 15 ten thousands
the answer is 15 ten thousand because all the other except this is equal to 15,000
I made a mistake while solving the inequality below. What mistake did I make? Explain what I should’ve done instead.
Answer:
Mistakes:
Used addition
Didn't flip inequality form
Corrections:
Divide each term
Instead of a positive value it should be negative
flip the direction of the inequality form
Step-by-step explanation:
[tex] - 9x \div - 9 \leqslant 90 \div – 9 [/tex]
cancel the common factor
[tex] \times \leqslant 90 \div - 9[/tex]
Divide 90 by – 9
Answer is:
[tex] \times \leqslant - 10[/tex]
Hope this helps!
Help,anyone can help me do quetion.
Answer:
(a) x = [tex]128^{o}[/tex]
(b) x = [tex]74^{o}[/tex]
Step-by-step explanation:
A. sum of angles in a polygon = (n - 2) 180
The polygon given is an irregular pentagon, where n = 5
So that;
sum of angles in a pentagon = (5 - 2) 180
= 3 x 180
= [tex]540^{o}[/tex]
Thus,
x + 90 + 76 + 110 + 136 = [tex]540^{o}[/tex]
x + 412 = [tex]540^{o}[/tex]
x = [tex]540^{o}[/tex] - 412
x = [tex]128^{o}[/tex]
B. The polygon given is an irregular pentagon, where n = 5.
Let the supplementary angle with angle 38 be represented by y,
y + 38 = 180
y = 180 - 38
= [tex]142^{o}[/tex]
y = [tex]142^{o}[/tex]
Let the supplementary angle with x be represented by z, so that;
z + 72 + 120 + 100 + 142 = [tex]540^{o}[/tex]
z + 434 = [tex]540^{o}[/tex]
z = [tex]540^{o}[/tex] - 434
= [tex]106^{o}[/tex]
z = [tex]106^{o}[/tex]
But, x + z = [tex]180^{o}[/tex]
Then;
x + [tex]106^{o}[/tex] = [tex]180^{o}[/tex]
x = [tex]180^{o}[/tex] - [tex]106^{o}[/tex]
= [tex]74^{o}[/tex]
x = [tex]74^{o}[/tex]
An 11% fee was
added to $125
credit card
purchase. What
was the total
purchase?
Answer:
$138.75
Step-by-step explanation:
t = total purchase
t = 125 + 125(11%)
= 125 + 13.75
t = 138.75
The total purchase was $138.75.
Money in a bank triples every 9 years. If $100 is deposited today, what will it's value be after 36 years?
Answer:
[tex]\$8,100[/tex]
Step-by-step explanation:
We can denote this increase with the function [tex]y=3^x\cdot 100[/tex], where [tex]y[/tex] is value after [tex]\frac{x}{9}[/tex] years.
Substituting [tex]x=36[/tex], we get:
[tex]3^4\cdot 100=\boxed{\$8,100}[/tex]
Answer:
8,100
Step-by-step explanation:
The first 9 years would be 300, then 18 years would be 900, and 27 years it would be 2,700, and finally after 36 years it would be 8,100.
Select ALL the equivalent representations of 10 x 10 * 10°
1
A
1
1,000
103
B
10-3
0.01
E
C
0.001
103
F
Answer:
[tex] \frac{1}{10 \times 1 \times 10} \\ = \frac{1}{1000} \\ = 0.001 \\ = \frac{1}{ {10}^{3} } \\ = {10}^{ - 3} [/tex]
the answers A,B,C and D are equivalent
Find the average rate of change of a function that contains the points (-2,3) and (2,5)
Answer: [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
Rate of change are typically found using [tex]\frac{y_{2} -y_{1}}{x_{2}-x_{1} }[/tex].
[tex](x_{1}, y_{1}) = (-2, 3)\\(x_{2}, y_{2}) = (2, 5)\\\\\frac{5-3}{2-(-2)} =\frac{2}{2+2} =\frac{2}{4} =\frac{1}{2}[/tex]
Therefore, the rate of change(aka slope) is [tex]\frac{1}{2}[/tex].
is -cos(x) the same as cos(-x)?
Answer:
Not the same
Because if it derives, it will be positive and the other negative
The height of a triangle is 2 less than 3 times it's base. If the area of the triangle is 48cm squares determine the base and height?
we assume the height of the triangle is x,
so the base length will be x+4
the triangle area will be area = 1/2 ( base * height)
48 = 1/2 (x + 4) x
96 = x2 + 4x
96 + 4 = x2 + 4x + 4
100 = (x + 2)2
10 = x + 2 (for the square 100, we ignore the -10, minus is meaningless in length )
x = 8
x + 4 = 8 + 4 = 12
so the height for the triangle is 8 unit, base is 12 unit,
brainliest ♥️
What is the quotient?
Answer:
I'm not good at math
Step-by-step explanation:
Lorelei needs to find the distance across a lake. She locates two points on opposite sides of the lake, then walks a straight line from each point to a spot south of the lake. The path on one side is 444 feet long, while the other path is 552 feet long. The two paths meet at an angle of 68 degrees. find the distance across the lake to the nearest foot.
Answer:
564 ftStep-by-step explanation:
We have two sides of the triangle and the included angle and we need to find the missing side.
Use the law of cosines:
[tex]c = \sqrt{a^2+b^2-2ab*cos C}[/tex][tex]c = \sqrt{444^2+552^2-2*444*552*cos (68)}[/tex] ≈ 564 ft4x^2+9x+2 factoring
4x²+9x+2= 4x²+8x+x+2= 4x(x+2)+1(x+2)=(4x+1)(x+2)
Answer:
Step-by-step explanation:
4x^2+9x+2
4x^2+(8+1)x+2
4x^2+8x+x+2
4x(x+2)+1(x+2)
(4x+1)(x+2)