Solve the system of equations - 8x - 5y = -13 and - 4x – 5y = 11 by
combining the equations.
Answer:
(6,-7)
Step-by-step explanation:
subtract them:
-8x - 5y = -13
-4x - 5y = 11
you get
-4x = -24
so x = 6
plug x into the second equation:
-24 - 5y = 11
-5y = 35
y = -7
so your solution is (6,-7).
Answer:
Your solution is (6, -7).
Step-by-step explanation:
Combining the equations is also known as substitution. This is done when you substitute one variable into another equation.
-8x - 5y = -13
-4x - 5y = 11
Let's change the second equation into one with one variable on each side.
-5y = 4x + 11
y = -4/5x - 11/5
Now, plug this into your first equation.
-8x - 5(-4/5x - 11/5) = -13
Distribute the -5 sign.
-8x + 4x + 11 = -13
Combine the like terms.
-4x + 11 = -13
-4x = -24
Isolate x by dividing both sides by -4.
x = -24/-4
x = 6
Now plug this back into either equation.
y = -4/5(6) - 11/5
Multiply.
y = -24/5 - 11/5
Subtract.
y = -35/5
Simplify.
y = -7
Your solution is (6, -7).
Check this by plugging in these values into the equation you have not checked yet.
-8(6) - 5(-7) = -13
-48 + 35 = -13
-13 = -13
Your solution is correct.
Hope this helps!
Pls help me! I will mark brainliest if you are correct
Answer:
I' would say A but C could be a possibility.
Step-by-step explanation:
Answer: it would be c!
Step-by-step explanation:
The rest of the answers r involving with the game, i they let them, they’ll choose themselves! Brainliest pls- if u want too. i explained, and hopes this helps
in the picture, thanks :)
A tree casts a 24 foot shadow while the sun is at an angle of elevation of 58°. Use this information to approximate the height of the tree to the nearest tenth of a foot.
Which of Polygons B, C, D, E, and F are similar to Polygon A?
Answer:there is no picture
Step-by-step explanation:
Answer:
theres no picture brainliest
Step-by-step explanation:
jayfeather friend me
Which expression is equivalent to 2 – 35?
Choose 1 answer:
A
2- (-35)
B
2+(-35)
-35 - 2
D
35 - 2
V
Answer:
The Correct answer is B
Step-by-step explanation:
35 - 2 is 33
so you just add a negative sign and you have your answer
11g − 5g + –17g − –7g = –12
Answer:
g=3
Step-by-step explanation:
11g-5g+-17g-(-7g)=-12
Add the like terms (nice that in this case they are all on the same side)
6g+-17g-(-7g)=-12
-11g-(-7g)=-12
-4g=-12 Now we divide (phew that was a lot of negatives XD)
g=3
5) A 3-year-old dog is often considered to be 21 in human years. Assume that the age
of a dog varies directly with the age of a human. What is the human-year age of a dog
that is 14-years-old?
Answer:
98
Step-by-step explanation:
Answer:
Answer is 98
Step-by-step explanation:
You take 14 and times it by 7 to get 98
If James measures 5‘4“ tall how tall is James in inches
Answer:
64 inches
Step-by-step explanation:
5 * 12 = 60
60 + 4 = 64
Drag the symbol to complete the solution to this inequalities
Answer:
x ≤ 13.2.
Step-by-step explanation:
6 ≥ x/2.2
Multiply both sides by 2.2:
6 * 2.2 ≥ x
x ≤ 13.2.
The solution to the inequality is [tex]x \leq 13.2[/tex], the correct symbol used in blank is ≤.
To complete the solution to the inequality [tex]6 \geq \frac{x}{2.2}.[/tex]
Rearrange the inequality as follows:
[tex]\frac{x}{2.2} \le 6[/tex]
The solution to the inequality is:
[tex]x \leq 13.2[/tex]
Comparing the expression [tex]\frac{x}{2.2}[/tex] to 6, we can see that [tex]\frac{x}{2.2}[/tex] should be less than or equal to 6 in order for the inequality to hold true.
Therefore, the correct symbol to place in the blank is "≤" and solution is [tex]x \leq 13.2[/tex].
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Ines has saved $5. She doubles the amount she saves each week. Does the function have a constant difference or a constant ratio? Does this represent an exponential function?
Answer:
The function have a constant ratio
No, it does not represent an exponential function.
Step-by-step explanation:
As given,
Ines has saved $5. She doubles the amount she saves each week.
⇒ In first week she saved = $5
In second week she saved = 2×$5 = $10
In third week she saved = 2×$10 = 20
In fourth week she saved = 2×$20 = 40
and so on..
∴ we get the series
5, 10, 20, 40 ,.......
If the series is given as a, b, c, d, ..... , then
The common difference is defined as d = b-a = c-b
The common ration is defined as r = [tex]\frac{b}{a} = \frac{c}{b}[/tex]
Here, in the given question
The series is - 5, 10, 20, 40
This has no common difference , d = 10 - 5 (= 5 )≠ 20 - 10 (= 10)
As 5 ≠ 10
So the function does not define common difference .
Now,
This has common ratio , r = [tex]\frac{10}{5} (=2) = \frac{20}{10}(=2)[/tex]
As 2 = 2
So, the function represent common ratio
Now,
The function does not represent an exponential function because it is increased by common ratio.
Find the area of the figure
Answer:
What figure?
Step-by-step explanation:
Question 3 what is the answer
Please help! Giving out brainiest.
Answer:
x - 1
Step-by-step explanation:
3(3x + 3) - 2(5 + 4x)
9x + 9 -10 - 8x
x - 1
hope this helps!
Use the distributive property to find the equivalent expression.
7(2 + 5y) =
y
+
In which number is the digit 6 one hundred times larger than it is in the number 647?
A. 5,638
B. 6,523,532
D. 38,641
C. 65,398
Answer:
65,398
Step-by-step explanation:
In the numbers 5,638 and 38,641, the digit 6 is the SAME value as in 647. In the number 6,523,532, the digit 6 is 10,000 times larger than in 647. In the number 65,398 the digit 6 is 100 times larger than in 647.
The equation of line r is y = –3/2 x + 5. Line s is parallel to line r. What is the slope of line s?
Answer:
-3/2
Step-by-step explanation:
Parallel lines have same slopes.
The original price of a jacket is $70. The sale price is 30% off the original price. What is the amount off the original price (discount)? How much will you pay for the jacket with the discount?
Answer:
$49
Step-by-step explanation:
$70 - 30% = $49
Answer
its 47$
Step-by-step explanation:
You divide the number by the percentage which in this problem would look like 0.30 and then you move the decimal to the left once after you get your answer this is about
What are the solutions of 16p^2 - 64 = 0
Answer:
p = 2 or p = -2
Step-by-step explanation:
Solve for p over the real numbers:
16 p^2 - 64 = 0
Hint: | Factor constant terms from the left hand side.
16 p^2 - 64 = 16 (p^2 - 4):
16 (p^2 - 4) = 0
Hint: | Divide both sides by a constant to simplify the equation.
Divide both sides by 16:
p^2 - 4 = 0
Hint: | Using the quadratic formula, solve for p.
p = (0 ± sqrt(0^2 - 4 (-4)))/2 = ( ± sqrt(16))/2 = ( ± 4)/2 = ± 2:
Answer: |
| p = 2 or p = -2Solve for p over the real numbers:
16 p^2 - 64 = 0
Hint: | Factor constant terms from the left hand side.
16 p^2 - 64 = 16 (p^2 - 4):
16 (p^2 - 4) = 0
Hint: | Divide both sides by a constant to simplify the equation.
Divide both sides by 16:
p^2 - 4 = 0
Hint: | Using the quadratic formula, solve for p.
p = (0 ± sqrt(0^2 - 4 (-4)))/2 = ( ± sqrt(16))/2 = ( ± 4)/2 = ± 2:
Answer: |
| p = 2 or p = -2Solve for p over the real numbers:
16 p^2 - 64 = 0
Hint: | Factor constant terms from the left hand side.
16 p^2 - 64 = 16 (p^2 - 4):
16 (p^2 - 4) = 0
Hint: | Divide both sides by a constant to simplify the equation.
Divide both sides by 16:
p^2 - 4 = 0
Hint: | Using the quadratic formula, solve for p.
p = (0 ± sqrt(0^2 - 4 (-4)))/2 = ( ± sqrt(16))/2 = ( ± 4)/2 = ± 2:
Answer: |
| p = 2 or p = -2Solve for p over the real numbers:
16 p^2 - 64 = 0
Hint: | Factor constant terms from the left hand side.
16 p^2 - 64 = 16 (p^2 - 4):
16 (p^2 - 4) = 0
Hint: | Divide both sides by a constant to simplify the equation.
Divide both sides by 16:
p^2 - 4 = 0
Hint: | Using the quadratic formula, solve for p.
p = (0 ± sqrt(0^2 - 4 (-4)))/2 = ( ± sqrt(16))/2 = ( ± 4)/2 = ± 2:
Answer: p = 2 or p = -2
A mountain climber climbed down a cliff 20 metres at a time. He did this 3 times in one
day. What was the overall change in his elevation?
Answer: The climbers overall change in elevation was -60 meters
Hope this helps. Let me know if you need anything else.
Find The value of x =
Answer:
x = 10
Step-by-step explanation:
5 / sin 30° = x / sin 90°
5 / (1/2) = x / 1
5 . 1 = 1/2 . x
5 = 1/2x
x = 5/1/2
x = 10/1
x = 10
help pleaseee thank you
I don’t know what I’m trying to solve here but wouldn’t X be 0 since anything you multiply it equals zero?
10. How long did it take for Krista's family to drive the 110 mi, to the cabin in the mountains if they were
able to average only 40 mph?
Answer:
2.75 hours
im pretty sure
Step-by-step explanation:
Catherine bought apples and pears for a school picnic. The total number of pieces of fruit that she bought was less than 100. She bought more apples than pears.
Answer:
it says LESS THAN not less tha n or equal to so it cant be a or b or d, so it is c!
Step-by-step explanation:
Catherine bought apples and pears for the school picnic. If the total fruit is less than 100, then the correct equation for this will be y<100-x and y<x. Hence, option C is correct.
What is an equation?Equations are mathematical expressions that have two algebra on either side of an equal (=) sign. The expressions on the left and right are shown to be equal to one another, demonstrating this relationship. L.H.S. = R.H.S. (left-hand side = right side) is a fundamental simple equation.
As per the given data in the equation,
Catherine bought apple and pears.
The overall quantity is less than 100
Let the number of apples is x and,
The number of pears is y.
She bought more apples than pears,
y<x.
And y < 100-x.
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River C is 100 miles longer than River D. If the sum of their lengths is 5,500 miles, what is the length of each river?
Answer:
river C is 2850 and river B is 2650
HELP
Question 6 (1 point)
How likely is it for the spinner to land on a C?
There is a
% chance the spinner will land on a C.
Blank 1:
Answer:
The likeliness to land on C is 1/2
Step-by-step explanation:
hope this helps
Write a ratio, in the simplest form and a percent for the shaded area (there's a 5x4 box and 6 cubes are shaded)
Answer:
[tex]\%Percent = 30 \%[/tex]
Step-by-step explanation:
Given
[tex]Shaded = 6\ cubes[/tex]
[tex]Box = 5\ x\ 4[/tex]
Required
Determine the percentage of the shaded cubes
First, we calculate the number of boxes:
[tex]Box = 5\ x\ 4[/tex]
Express as multiplication
[tex]Box = 5\ *\ 4[/tex]
[tex]Box = 20[/tex]
This implies that there are 20 cubes in the box.
The percentage of the shaded cubes is:
[tex]\%Percent = \frac{Shaded}{Box} * 100\%[/tex]
[tex]\%Percent = \frac{6}{20} * 100\%[/tex]
[tex]\%Percent = \frac{6* 100}{20} \%[/tex]
[tex]\%Percent = \frac{600}{20} \%[/tex]
[tex]\%Percent = 30 \%[/tex]
30% were shaded
What is m<1?
A.39
B. 47
C. 51
D. 129
Oops i accidentally deleted it, but the angle would be 39 degrees :)
Please help me! STU is an equilateral triangle. If ST is one less than twice x, SU is 37 less than five times x, and TU is 11 more than x, find x and the measure of each side.
Answer:
x = 12
ST = 23 units
SU = 23 units
TU = 23 units
Step-by-step explanation:
For an equilateral triangle, all the angles are equal. Also, all the sides are equal.
Hence given that the sides ST is one less than twice x, SU is 37 less than five times x, and TU is 11 more than x
ST = 2x - 1
SU = 5x - 37
TU = x + 11
Since ST = SU = TU
2x - 1 = 5x - 37
collect like terms
37 - 1 = 5x - 2x
36 = 3x
Divide both 3
36/3 = x
x = 12
Therefore
ST = 2x - 1 = 2(12) - 1 = 23 units
SU = 5x - 37 = 5(12) - 37 = 23 units
TU = x + 11 = 12 + 11 = 23 units
Ima just need help again
Answer:
B, E
Step-by-step explanation: