Solve the system of equations using the elimination method and enter the value of y
4x - 5y = -9
- 4x + y = -7
Answer:
y = 4; x = 11/4
Step-by-step explanation:
4x - 5y = -9
-4x + y = -7
Add the two equations to eliminate x:
-4y = -16
-4y/-4 = -16/-4
y = 4
Plug in y for x
4x - 5y = -9
4x - 5(4) = -9
4x - 20 = -9
4x = -9 + 20
4x = 11
4x/4 = 11/4
x = 11/4
Answer from Gauthmath
What is the equation of the following line?
(a) Mary and Cynthia were building a cone-shaped sand castle. After some time, the diameter of
the sand shaped cone was 14 in. and the height was 15 in. What is the appoximate volume of the
sand cone rounded to the nearest tenth? (Show work!!) PLEASE HELP!
Answer:
[tex]\displaystyle V\approx 769.7\text{ in}^3[/tex]
Step-by-step explanation:
We are given that the diameter of the sand-shaped cone is 14 inches, and the height is 15 inches.
The volume for a cone is given by:
[tex]\displaystyle V=\frac{1}{3}\pi r^2h[/tex]
Where r is the radius and h is the height.
Since the diameter is 14, the radius is 7.
And we are given that the height is 15.
Therefore, the volume will be:
[tex]\displaystyle V=\frac{1}{3}\pi (7)^2(15)[/tex]
Use a calculator:
[tex]\displaystyle V\approx 769.7\text{ in}^3[/tex]
The volume of the cone is approximately 769.7 cubic inches.
Please solve
(2x^2 +x+4) (x+7) = 6x^3+29x^2+47x+28
with explanation
ASAP!!!
On a time crunch!!!!!
Answer: x = 0
Step-by-step explanation:
Subtract 6x^3+29x^2+47x+28 from both sides:
(2^2 + x + 4) (x - 7) - 6x^3+29x^2+47x+28
(6x^3+29x^2+47x+28)-6x^3+29x^2+47x+28
= -4x^3 - 14x^2 - 36x = 0
Now factor the left side:
-4x^3 - 14x^2 - 36x = 0
(-2x) (2x^2 + 7x + 18) = 0
Now set the factors equal to 0
-2x = 0 or 2x^2 + 7x + 18 = 0
x = 0
2 more help !!!!!!!!
Solve for x.
X -8 = -11
PLZ I NEED ANSWER ASAP
Answer:
i had this text by ms putz u prob know her she ur teacher that answer is -3 because if you subtract -8 from -11 you will get -3
Step-by-step explanation:
gamitin ang alin man sa mga digit na ito 0 3 6 at 7 bumuo ng tig dalawang 2 digit na bilang at three digit na bilang divide ang mga bilang na nabuo sa mga bilang na nasa hanay ng divisor at isulat ang sagot sa hanay ng quotient
Dividend Divisor Quotient
7
9
Answer: gamitin ang alin man sa mga digit na ito 0 3 6 at 7 bumuo ng tig dalawang 2 digit na bilang at three digit na bilang divide ang mga bilang na nabuo sa mga bilang na nasa hanay ng divisor at isulat ang sagot sa hanay ng quotient
Step-by-step explanation:
Tell whether the angles are adjacent or vertical. Then find the value of x . 117° xº
Answer:
please give the picture
Step-by-step explanation:
I will then solve this
Round 1526.04 to the nearest tenths
Multiplying - make sure your answer is in fraction form.
1.4 x 0.8 =
2.3 x 1.8 =
2.37 x 1.2 =
Answer:
Multiplying - make sure your answer is in fraction form.
1.4 x 0.8 = 28/25
2.3 x 1.8 =207/50
2.37 x 1.2 =721/250
Which graph shows a linear function?
Answer:
None of the above...
Step-by-step explanation:
The first one is a cubic function and the v-shaped one is an absolute value function.
Answer:
It is the 2nd graph. The graph that passes through x=3 and y=3.
Step-by-step explanation:
Which expression represents the product of x^3+2x-1 andx^4-x^3+3
Answer: x^4 + 2x + 2
Step-by-step explanation:
I just took the test. :)
Answer: x^4 + 2x + 2
Step-by-step explanation:
Big brain
need help pleaseeee !!!
Answer:
A (0,8)
B (1,4)
C (2,2)
D (3,1)
2. The sides of a triangle are in the ratio 3:7:10 and the perimeter is 80 inches.
What are the lengths of the sides of the triangle?
Can anyone help please ?
Step-by-step explanation:
3+7+10=20
80/20=4
1 ratio =4
3(4) : 7(4) : 10(4)
= 12 : 28 : 40
find an equation for the nth term of a geometric sequence where the second and fifth terms are -8 and 512
Answer:
[tex]n_x = -4n_{x-1}\\[/tex]
where [tex]n_1[/tex] = 2
Step-by-step explanation:
512/-8 = -64
difference of n = 3
[tex]\sqrt[3]{64} = 4[/tex]
[tex]n_x = -4n_{x-1}\\[/tex]
where [tex]n_1[/tex] = 2
What is the answer to the angle BD?
straight angle. this is easyyy
please help me its due later today
Answer:
y
___
2
1
-2
-1
in that order, hope this helps :)
Answer:
a) y=2
b) y=1
c) y= -1
d) y= -2
Step-by-step explanation:
What is (1.2 x 10^-5) / 4 in scientific notation??
Answer:
3×[tex]10^{-6}[/tex]
Step-by-step explanation:
Hope it helps ;)
Answer:
3x10^-6
Step-by-step explanation:
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. The sign of the exponent will depend on the direction you are moving the decimal.
Which one is the answer I think it’s four or five
Answer:
The answer is 4 (B)
Step-by-step explanation:
Hope this Helped
What transformation rule would represent a shift of 3 units to the left 4 units down?
Group of answer choices
(x,y) –> (x – 4, y – 3)
(x,y) –> (x – 3, y – 4)
(x,y) –> (4x, 3y)
(x,y) –> (x + 3, y + 4)
Given:
Shift of 3 units to the left 4 units down.
To find:
The transformation rule.
Solution:
The rule of transformation is
[tex](x,y)\to (x+a,y+b)[/tex] ...(i)
Here, a<0 if the figure shifts a units left and a>0 if the figure shifts a units right.
Similarly, b<0 if the figure shifts b units down and b>0 if the figure shifts b units up.
If a transformation represents shift of 3 units to the left 4 units down, then a=-3 and b=-4.
Putting a=-3 and b=-4 (i), we get
[tex](x,y)\to (x+(-3),y+(-4))[/tex]
[tex](x,y)\to (x-3,y-4)[/tex]
Therefore, the correct option is B.
HELP PLSS I DONT WANNA FAIL
Answer: 1/2 and 3/6
Explanation: 1/2 is equal to 3/6 because if you divide both 3 and 6 by 2 it’s 1/2
Not sure about 4
For a cat that weighs 15 pounds, rank the following scale weights from least
accurate to most accurate.
15.10 pounds
13.9 pounds
16.2 pounds
15.01 pounds
Answer:
16.2 pounds (least accurate)
13.9 pounds (2nd least accurate)
15.10 pounds (2nd most accurate)
15.01 pounds (most accurate)
Step-by-step explanation:
I hope this helps :)
Answer:
16.2 pounds
13.9 pounds
15.10 pounds
15.01 pounds
HELP OR I EAT YOUR COOKIES (5TH GRADE MATH)
Lamont's empty backpack weighs 2 1/2 pounds. He puts 4 notebooks in it that each weigh 15 ounces. How many pounds does Lamont's backpack weigh now?
The answer is 6.252 pounds.
2 1/2 as a decimal is 2.5, and 15 ounces is equal to 0.938 pounds. Since there are 4 notebooks, you multiply 0.938 by 4, which is 3.752. Now, you just add 2.5+3.752=6.252
A group of five students have a mean test score of "34.2." Another student has a score of 50. What is the mean average of all "six" students?
Answer:
The mean average of all "six" students is 36.83.
Step-by-step explanation:
Mean:
The mean is the sum of all scores divided by the number of scores.
A group of five students have a mean test score of "34.2." Another student has a score of 50.
This means that the sum is given by:
[tex]S = 5*34.2 + 50 = 171 + 50 = 221[/tex]
What is the mean average of all "six" students?
Sum of 6 students is 221. So
[tex]M = \frac{221}{6} = 36.83[/tex]
The mean average of all "six" students is 36.83.
A parallelogram has an area of 37.72 m² and a height of 4.6 m.
How long is the base of the parallelogram?
Enter your answer as a decimal in the box
Answer:
8.2
Step-by-step explanation:
area=b*h
37.72=b*4.7
b=37.72/4.7
=8.2
Answer:
Step-by-step explanation:
Area of parallelogram= base×perpendicular height
37.72m²=base×4.6m
base= 37.72m²/4.6m²
base= 8.2m
please help me on this
9514 1404 393
Answer:
10 ft
Step-by-step explanation:
The midsegment length is the average of the other two lengths.
(QR +PS)/2 = TU
QR +PS = 2×TU . . . . . . . . . . . . . . . multiply by 2
QR = 2×TU -PS = 2(14 ft) -18 ft . . . subtract PS; substitute given values
QR = 10 ft
which pairs of expressions are equivalent to one another? Mark all that apply.
-10 - (-7) and -10 + (-7)
7 + (-16) and 16 - 7
11 - 5 and 11 + (-5)
7 - 13 and 13 - 7
-20 - (-45) and -20 + 45
9 + 8 and 9 - (-8
Answer:
11 - 5 and 11 + (-5)
-20 - (-45) and -20 + 45
9 + 8 and 9 - (-8
Step-by-step explanation:
Two negatives make a positive so -- and + are the same
The number of dogs at the shelter is a two digit, odd number. It is more than 80. The tens digit is less than the ones digit. The sum of the digits is 17. How many dogs are at the shelter?
Answer:
89
Step-by-step explanation: the sum of both numbers are 17/ 9+8=17.
89 is greater than 80
Answer:
89
Step-by-step explanation:
89 is greater than 80
8 is less than 9
8 + 9 = 17
It meets all the requirements
3. The measure of an interior angle of a regular polygon is 140. Find the number of sides the polygon has.
Answer:
I hope this will help u
Step-by-step explanation:
Each interior angle of a regular polygon = 140 deg. So each exterior angle of the regular polygon = 180-140 = 40 deg. Hence the regular polygon has 360/40 = 9 sides.
Please mark me as Brilliant
Please hurry! Will be choosing brainliest!
In the cone below, the radius is 6 meters and the height is 8 meters.
Find the volume of the cylinder pictured below. Use 3.14 for pi. Give your answer
Answer:
301.59
Step-by-step explanation: