I need help with math
Answer:
J - 15 degrees
Step-by-step explanation:
90 - 75 = 15 degrees
Hopefully this helps- let me know if you have any questions
Answer:
15
Step-by-step explanation:
90 - 75 = 15
What is the solution to this system of linear equations?
y − 4x = 7
2y + 4x = 2
(3, 1)
(1, 3)
(3, −1)
(−1, 3)
What is the value of x in the solution to this system of equations?
3x - 5y = 22
y=-5x +32
Step-by-step explanation:
➱ What is an equation?
Equation is a mathematical account that involves letters that are called unknowns the most used are X and Y. And it has many degrees we will see below the second degree.
➱ How to do a normal equation resolution:
➤ To solve equations we must separate the numbers with unknowns that are in the equation for the left side of the equals.
➤ And we must pass the numbers without unknowns to the right side of the equals.
➤ When the numbers are on the wrong side of the equals, we change the sign every time we change sides.
Rules:
➢ Numbers with unknowns = left side of the equals.
➢ Numbers without unknowns = right side of the equals.
➢ Changing sides = change the signal too.
========================
Answer:
y= -5+32
3x-5(-5+32) =22
3x-25+160=22
3x= 22+25-160
3x= 47-160
3x= -113
x= [tex]\frac{-113}{3}[/tex]
X= -37,6666666667
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Good Studies !!
need to finish soon please help
Select the expression equivalent to (2.1x + 4.3) - (-3x - 7)
A. -0.9x - 2.7
B. -0.9x + 11.3
C. 5.1.x - 2.7
D. 5.1 x + 11.3
Please actual answers
What is the volume of the cone? Use 3.14 for p.
A
115.40 cubic mm
B
346.19 cubic mm
C
461.58 cubic mm
D
1384.74 cubic mm
Twenty more than one- fifth of a number is 120. Find the number.
welp lol
Answer: x=500
Step-by-step explanation:
Twenty more (+20) of a fifth of a number (.2x) is equal to 120. So, the equation would be .2x+20=120. To isolate x, subtract 20 from each side. So now we have .2x=100. To get rid of the .2 or 1/5, we have to multiply everything by the reciprocal of 1/5, or 5. So, 100(5)=.2x(5), or simplified, x=500. Hope this helps!
Quadrilateral ABCD is inscribed in this circle.
What is the measure of angle A?
Answer:
Step-by-step explanation:
21 because x= tend + lHk
Answer:
88
Step-by-step explanation:
X° + 116° = 180°(sum of opposite angle of a quadrilateral in circle is equal 180 °)
x°=180-116
x°=64°
therefore
A=(2(64)-40)
A=88°
Find the HCF of 126 and 420
Answer:
42
Step-by-step explanation:
Find the prime factorization of 126
126 = 2 × 3 × 3 × 7
Find the prime factorization of 420
420 = 2 × 2 × 3 × 5 × 7
To find the GCF, multiply all the prime factors common to both numbers:
Therefore, GCF = 2 × 3 × 7
GCF = 42
The highest common factor HCF of 126 and 420 is 42
What is HCF and LCM?The Greatest Common Divisor GCF or the Highest Common Factor HCF is the highest number that divides exactly into two or more numbers. It is also expressed as GCF or HCF
Least Common Multiple (LCM) is a method to find the smallest common multiple between any two or more numbers. A common multiple is a number which is a multiple of two or more numbers
Product of HCF x LCM = product of two numbers
Given data ,
Let the HCF of the two numbers be represented as n
The value of n is
Let the first number be p = 126
Let the second number be q = 420
The factors of 126 = 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
The factors of 420 = 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20 , 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210 and 420
So , the highest common factor of the two numbers 126 and 420 is 42
Therefore , the value of n = 42
Hence , the HCF is 42
To learn more about LCM and HCF click :
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Olivia buys cookies and apples at the store.
• She pays a total of $24.79.
• She pays a total of $4.75 for the cookies.
• She buys 4 bags of apples that each cost the same amount.
A city that has an elevation of 15 meters is closer to sea level than a city that has an elevation of -10 meters. Agree or Disagree
Answer:
disagree
Step-by-step explanation: if a city that has an elevation of 15 meters is closer to sea level than a city that has an elevation of -10 meters. -10 meters is still 5 meters closer than 15 meter
Write the quadratic function represented by the graph.
( -2, 0 )
( 2, 32 )
( 4, 0 )
Step-by-step explanation:
not so sure tho
20 POINTS!!! HELP PLEASE!!!!!
Answer:
2
Step-by-step explanation:
the points for g is -4,0 and x is 4,2 so... yea 2
Answer:
Step-by-step explanation:
I don't know what the first graph is for. It obviously isn't the graph of g(x).
In the second graph, f(x) and g(x) intersect when x=4
2/5- square root of 3
simplify
Answer:
(5 + √3)/11Step-by-step explanation:
2/(5 - √3) = 2(5 + √3)/(5 - √3)(5 + √3) = multiply by conjugate of the denominator2(5 + √3)/(25 - 3) = simplify(5 + √3)/11 answerIf you take a number, times by 5 then add 7. You get the same as if you took the number, times by 9 then add 3. What is the number?
Answer: The number is 1
Step-by-step explanation:
5x + 7 = 9x + 3
5x + 7 - 5x = 9x - 5x + 3
7 = 4x + 3
7 - 3 = 4x + 3 - 3
4 = 4x
x = 1
Check work:
5(1) + 7 = 12
9(1) + 3 = 12
It works
For which values of x will the rational expression below be undefined? Check
all that apply.
(x - 1)(x + 1)
X + 2
A. -1
B. 1
C. -2
D. 2
E. -5
F 5
Answer:
-2
Step-by-step explanation:
For the given expression to be undefined, this means that the denominator must be zero.
From the given expression, the denominator is x + 2
Equating this to zero;
x+2 = 0
Subtract 2 from both sides
x+2-2 = 0 -2
x = -2
Hence the value of x that makes it undefined is -2
. All clothing is being marked down 15%. Which expression represents the new retail price? A) 0.85x C 1.85x (B) 1.15x D 0.15x
Answer:
A
Hope that helps!
Step-by-step explanation:
The expression that represents all clothing is being marked down 15%.
is A) 0.85x.
What is the percentage?A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.
We know fractions and percentages are related.
Assuming the cost of clothing to be 'x'.
∴ After the markdown of 15% it is,
= {(100 - 15)/100}×x.
= {85/100}×x.
= 0.85x
learn more about percentages here :
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Which of the following numbers Display the ration of 3/10?
8) Does the table show a function? *
Answer:
yes
Step-by-step explanation:
Answer:
no
Step-by-step explanation:
The weight of 25 folding chairs is 15 kg. How many
chairs can be loaded on a truck having a capacity of
carrying 2025 kg load?
Answer:
3,375 chairs
Step-by-step explanation:
The weight of 25 folding chairs is 15 kg
Number of folding chairs : weight
= 25 : 15
How many chairs can be loaded on a truck having a capacity of
carrying 2025 kg load?
Let number of folding chairs = x
Number of folding chairs : weight = x : 2025
Equate both ratios
25 : 15 = x : 2025
25/15 = x/2025
Cross product
25 * 2025 = 15 * x
50,625 = 15x
x = 50,625/15
x = 3,375
Number of folding chairs = 3,375 chairs
Determine how far the vehicle travels in 3 hours.
A helicopter travels 240 miles every 2 hours.
Answer:
360 miles
Step-by-step explanation:
The unit rate here is (240 miles) / (2 hours), or 120 mph.
In 3 hours the vehicle travels (120 mph)(3 hrs) = 360 miles
Answer:
360
Step-by-step explanation:
240/2 =120 So, you want to add 120 to 240 to get 360.
A tree is broken at a height of 7m from the ground and its top touches the ground at distance of 24m from the base of the tree. Find the original height of the tree. pls help with steps
please help me, u have no clue what to do. all it says is find the slope of the line that passes through the given two points using ratio method.
Answer:
Triangle y = 7
Triangle x = -3
Slope = - 7/3
Step-by-step explanation:
Formula:
slope (or m) = (y2 - y1)/(x2 - x1)
Plug numbers into formula
m = 8 - 1 / 4 - 7
m = 7 / -3
Cannot be simplified further
Slope = - 7/3
The triangle before y is asking for the difference, meaning what number do you get after taking y2 (8 in this problem) and subtracting y1 (1 in this problem) from it.
8 - 1 = 7 which forms the numerator for our slope
The same goes for the triangle before x. Find the difference
x2 - x1 = 4 - 7 = -3. This forms the denominator of our slope
need helpppp gajsgajshajda
What is the area of this figure?
Answer:
You split it into two parts then add them
Step-by-step explanation:
I will brainlist you please help me i need this
Answer:
[tex]q = 16\sqrt{2}, r = 16[/tex]
Step-by-step explanation:
Use proportions for 45-45-90 triangle.
Answer:
Step-by-step explanation:
Use proportions for 45-45-90 triangle.
Find the value of x.
93
2x + 12
round 1.19!!!! PLEASE
Answer:
1.2
Step-by-step explanation:
I am just writing this sentence to get the required amount of characters.
BRAINLY- if b=12 and c=18 what is the value of A?
Answer:
6[tex]\sqrt{5}[/tex]
Step-by-step explanation:
I'm assuming you are referring to the Pythagorean Theorem, which has the equation [tex]a^{2} +b^{2} =c^{2} \\[/tex]
b=12 c=18
[tex]a^{2} +12^{2} =18^{2}[/tex]
[tex]a^{2}+144=324[/tex]
[tex]a^{2} =180[/tex]
a=[tex]\sqrt{180}[/tex]
a=[tex]6\sqrt{5}[/tex]
Work out the length of AC.
Give your answer to 3 significant figures.
A
29 cm
23°
ch
B
Answer:
AC ≈ 11.3 cm
Step-by-step explanation:
Using the sine ratio in the right triangle
sin23° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{AC}{AB}[/tex] = [tex]\frac{AC}{29}[/tex] ( multiply both sides by 29 )
29 × sin23° = AC , then
AC ≈ 11.3 cm ( to 3 significant figures )