Solve the following systems: 3x+1=8y, 11y-3x=-11
Answer:
x= -10
y= -4
Step-by-step explanation:
Given data
3x+1=8y----------------1
11y-3x=-11--------------2
rearange
3x-8y=-1------------------1
-3x+11y=-11---------------2
add 1 and 2
3x-8y=-1------------------1
-3x+11y=-11---------------2
0+ 3y= -12
y= -12/3
y= -4
put y= -4 in 2
11y-3x=-11
11(-4)-3x=-11
-44-3x=-11
-44+11=3x
-33= 3x
x= -33/3
x= -10
What is the first step?
Answer:
-5x-1/6=3/2
-5×1/6+1/6=3/2+1/6
-5×÷5×=10/6/-5x
x=-10/30
x=-1/3Please help me!!!! i cant see files so just tell me!
A flock of sheep has 182 white sheep and 98 spotted sheep. Which proportion can be used to determine p, the percent of the flock that has spots?
Answer:
D) 98/280 = p/100
Step-by-step explanation:
Since p is the missing percentage, it has to be OVER 100, so C is eliminated.
Total:
182 + 98 = 280
Spotted sheep probability:
98/280 = 0.35 or 35%
To check:
[tex]\frac{98}{280} =\frac{p}{100} \\\\280p=9800\\x=35[/tex]
2 The points (-15, -3) and (-7, -1) both
lie on the graph of the linear function
y = f(x). What is the rate of change of
f(x) with respect to x?
Answer:
The rate of change of f(x) with respect to x is 1/4
Step-by-step explanation:
What this question simply ask is to find the slope of the line that passes through the two points
to find this, we use the slope equation
we have this as;
m= (y2-y1)/(x2-x1)
(x1,y1) = ((-15,-3)
(x2,y2) = (-7,-1)
m = (-1 + 3)/(-7 + 15) = 2/8 = 1/4
Find value of x. round answer to nearest tenth.
Answer:
x = 20
Step-by-step explanation:
Answer:
maybe is
Step-by-step explanation:
[tex] \sqrt{481} [/tex]
Find an exponential equation that passes through the points (0, 4) and (2, 9).
Given:
An exponential equation passes through the points (0,4) and (2,9).
To find:
Exponential equation that passes through the given points.
Solution:
Let the required exponential function is:
[tex]y=ab^x[/tex] ...(i)
The function passes through the points (0,4) and (2,9). It means the above equation must be true for these points.
[tex]4=ab^0[/tex]
[tex]4=a(1)[/tex]
[tex]4=a[/tex]
And,
[tex]9=ab^2[/tex]
Substituting [tex]a=4[/tex], we get
[tex]9=(4)b^2[/tex]
[tex]\dfrac{9}{4}=b^2[/tex]
[tex]\pm \sqrt{\dfrac{9}{4}}=b[/tex]
[tex]\pm \dfrac{3}{2}=b[/tex]
In an exponential function b>0. So, [tex]b=\dfrac{3}{2}[/tex].
Putting [tex]a=4,b=\dfrac{3}{2}[/tex] in (i), we get
[tex]y=4\left(\dfrac{3}{2}\right)^x[/tex]
Therefore, the required exponential function is [tex]y=4\left(\dfrac{3}{2}\right)^x[/tex].
find the value of x in the triangle shown below
x=square root of 28
x=square root of 64
x=9
x=10
Answer:
the length of the hypotenuse must be 10.
Step-by-step explanation:
This is a right triangle, so we can apply the Pythagorean Theorem.
6² + 8² = 10² so the length of the hypotenuse must be 10.
A particular metal has a density of 25g/cm cubed. Calculate the mass of 178cm cubed of this metal.
Mass = density x volume
Mass = 178 x 25 = 4,450 grams
PLEASE HELP
PLEASE HELP
PLEASE HELP
PLEASE HELPPPPPPPPPPPPPP
Answer: I think the perimeter is 17ab4
Step-by-step explanation:
The radius of a circle is 8.5 inches. The circumference of the circle is C inches.
A. 85/c
B. c/17
C. c/8.5
D. 17/c
Interpreting as: circle 8.5 inches.
Assuming
"circle"
is a geometric object
circle | radius 8.5 inches
Equation:
(x - x_0)^2 + (y - y_0)^2 = 72.
(assuming center (x_0, y_0))
Properties:
diameter | 17 inches
area enclosed | 227 in^2 (square inches)
circumference | 53.4 inches
answer is D. 17/C
LAST TIME TODAY BUT 5TH GRADE MATH
Answer: 1) 109.5 or 109 1.2
2) 136 r2
Step-by-step explanation:
Answer : 109 1/2 and 136 R 2
Step - by - step explanation :
First, convert the improper fraction into a mixed number . . . what is 438 divided by 4 ? 109.5 or 109 1/2 !
Second, divide . . . what is 1634 divided by 12 ? 136 with a remainder of 2 !
( sorry if any of these are wrong )
Question 6 of 10
Which equation matches the graph of the greatest integer function given
below?
Answer:
B. y = [x] + 3
Step-by-step explanation:
The answer to this graph would be
B. y = [x] + 3
This is because the graph is translated up by 3 units. Such that a value of 0 passed into x would give us a y value of 3 on the graph, which is represented as a black dot. For a value of -4 passed as x, the largest integer that is less than -4 would be -4 itself and if we add 3 to it due to following this function, we get a y value of -1 which is what is represented in the graph.
In the problem y = 2x + 3
find y if x= 4.
Answer:
y = 11
Step-by-step explanation:
y = 2x + 3
so 2x is (2 multiplied by x)
so if x is 4, and we have 2x, we would do 2 x 4
2x4 is 8.
take the 3 from before and add that to 8
8+3 is 11.
so y = 11
The number line shows all possible values for M Create an inequality that represents all possible values of M
Mike wants to paint one wall of his room. The wall measures 12 feet by 9 feet.on the wall is one square window that measures 4 1/2 feet on each side. Which of the following best describes the number of square feet Mike will paint? How much paint will Mike need?
Answer:
87.75 sq ft
Step-by-step explanation:
(12 × 9) - (4.5 × 4.5) = 87.75
What is the factored form of this expression?
x^2 + 6x − 16
Substitute numerical values into the expression for p and q.
Answer:
(x+2)(x-8)
Step-by-step explanation:
I don't have a question just look at the picture
Answer:
I looked at the picture and it looks nice
Step-by-step explanation:
I dont know the answer?
Aldo used 7 rolls of blue fabric to make costumes for the annual school play. He
used a total length of 25.2 yd of fabric. If each roll had the same length of
fabric, how much fabric was in each roll? Write your answer in inches.
Which quantity is proportional to 35⁄80?
Answer:
7/16
Step-by-step explanation:
Answer:
7/16
Step-by-step explanation:
Simplify
i need help abc or d plzzzzz
Answer:
Isosceles and Right
Step-by-step explanation:
An Isosceles Right Triangle is a right triangle that consists of two equal length legs. Since the two legs of the right triangle are equal in length, the corresponding angles would also be congruent. Thus, in an isosceles right triangle, two legs and the two acute angles are congruent.
Answer:
Isosceles and right
Step-by-step explanation:
We have a picture of triangle and are asked to name it, look at definitions below :
Isosceles - Geometrical figure with three sides and three angles
Right - Triangle where one angle is a right angle (90°)
Scalene - Triangle where all three sides have different lengths
Acute - Triangle where all three sides are less than 90°
If we look at the triangle, we can tell that it has three sides and three angles, therefore isosceles must be in one of the answer choices. Crossing out the options scalene and acute / scalene and right.
Now we have two options and we need to determine whether this triangle is an acute triangle or is a right triangle.
To figure out so we can look at the angle in the bottom left, which when measures equals to 90°. Therefore making it a right triangle and crossing out the other option.
Our answer left is Isosceles and Right.
Matt and Mark went to El Rodeo to have some dinner. Matt ordered 3 tacos and 2 enchiladas, which cost him $4.93. Mark ordered 2 tacos and 4 enchiladas, which cost him $6.38. What is the cost of one taco and what is the cost of one enchilada?
Answer:
The cost of one taco is $0.87 and the cost of one enchilada is $1.16
Step-by-step explanation:
Let the cost of tacos be X
and cost of enchiladas be y
So, by using given data, we have following equations
3X + 2Y = 4.93 (1)
2X + 4Y = 6.38 (2)
So, first multiply 1st equation by 2 and 2nd equation by 3, then subtracting 1st equation by 2nd.
= 2 × ( 3X + 2Y = 4.93) (1)
= 3 × (2X + 4Y = 6.38) (2)
= - (6X + 4Y = 9.86) (1)
= 6X + 12y = 19.14 (2)
= 8Y = 9.28
Y = 9.28 ÷ 8 = 1.16
By putting the value of Y in equation 1, we get
3X + 2(1.16) = 4.93
3X + 2.32 = 4.93
X = 2.61 ÷ 3 = 0.87
Hence, the cost of one taco is $0.87 and the cost of one enchilada is $1.16.
Multiply 6x by 3x^2y
PLEASE HELP PLEASE HELP
NO EXPLANATION
Answer:
A hope it helped im a junior in college i dont take science
Step-by-step explanation:
7th grade math help me pleaseeee
Answer:
the answer is 1-x5
Step-by-step explanation:
10x5 6x7+92 j0ll
Can someone please show the answer and explain? tysm!
Answer:
B. 40°
Step-by-step explanation:
AB // ED ∠ABC = ∠EDF = 50°
AC // EF ∠AGE = ∠CAB = 90 - ∠ABC = 90 - 50 = 40°
What is the trigonometric ratio for cosD?
Answer:
7/25
Step-by-step explanation:
Cos x=Adjacent/hypotenuse
Clad=21/75=7/25
(BRAINLYEST) Apply the markdown and find the sale price. Round to two decimal places when necessary.
A soft blanket originally cost $18.99. It is marked down 20%. What is the new price, not including sales tax?
Answer:
Got to quizlet it has the answer.
Step-by-step explanation:
Hope it helps
find the volume of a cone with a height 7 and radius 7
Answer:
359.19
Step-by-step explanation:
Using the formula V=(πr^2) * h/3 and plugging in the given values we get 359.19.
I estimated pi at about 3.14
in a race, a man covers 5km in 20 min. how much distance will he cover in 100 min
Step-by-step explanation:
men is covers by 25km in 100min
What is the exact value of cos 45°? Enter your answer, as a simplified fraction, by filling in the boxes
Answer:
The value of cos 45° is equal to 1/√2
Answer:
Its 1/2
Step-by-step explanation:
I just took the test