Answer:
12
Step-by-step explanation:
the proportion is 120/10=1200%
I'm sorry if this is wrong
-4x - 9y = 26
8x +9y = -34
Add to eliminate y.
Subtract to eliminate y.
Add to eliminate x.
Subtract to eliminate x.
Answer:
add to eliminate y
Step-by-step explanation:
Because the one y is negative, you would add it to the positive y to eliminate both. A positive plus a negative is the same as subtracting from the positive number.
ex: [tex]10+-5=5[/tex] because [tex]10-5=5[/tex]
hope this makes sense :)
Answer:
Add to eliminate y
Step-by-step explanation:
This is because you'll want to add
-4x -9y = 26
8x +9y = -34
to get rid/eliminate the y
The reason why it's not subtract it because the it'll become
-4x-9y=26
-8x-9y=34
which makes the y-values not the reciprocal of each other and you wouldn't be able to eliminate the y.
And it's neither of the add or subtract to eliminate x because the numbers need to be the same numbers and reciprocal of each other
ex:
4 and -4
or
8 and -8
or
-10 and 10
Which equation represents a function?
A) x = 4y + 7
B) y2 = -5x - 8
C) x2 + y2 = 16
D) y = ±2x + 3
Answer:
d y = 2x+3
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
what is the sum of 9/16 and 5/16?
Answer:
7/8
Step-by-step explanation:
sum = answer to an addition problem
This means we need to add.
To add fractions with like denominators, simply add the numerators, or the numbers above the fraction sign.
9/15 + 5/16
9 + 5 = 14
numerator = 14
Keep the denominator:
denominator = 16
14/16
Simplify:
(divide the numerator and denominator by 2)
14/2 = 7
16/2 = 8
7/8
Therefore, the sum is 7/8.
The sum of the two fractions shown of 9/16 and 5/16 is 7/8.
When adding fractions, if they have the same denominator, you can simply add up the numerators and keep the denominator.
This means that the sum of 9/16 and 5/16 is:
= (9 + 5) / 16
= 14 / 16
You then need to take this to its simplest form by dividing both the numerator and denominator by their highest common factor which is 2.
= (14 ÷ 2 ) / (16 ÷ 2)
= 7 / 8
In conclusion, the sum of these fractions is 7/8.
Find out more at https://brainly.com/question/22243648.
Use the unit circle to find the following values.
1. sin 150
2. tan 315
3. cot 11pi/6
4. cos 2pi/3
Please, I need this right
Answer:
x = 58
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the opposite interior angles
114 = 56+x
Subtract 56 from each side
114 -56 = x
58 = x
Please help i think i know the answer but im not sure
Answer:
A. 15 sq in
Step-by-step explanation:
So it wants to know the area of the yellow face: we have to subtract that chunk cut out of the bottom right from the larger rectangle.
Area = length x width = 4*4 = 16 sq in. This is the area of the larger rectangle.
Area = length x width = 1*1 = 1 sq in. This is the area of the rectangle that's cut out of the yellow area.
16 - 1 = 15 sq in
Answer: i feel like it's 15 length x width x height 4, 8, 12+3=15
Step-by-step explanation:
the table shows the time 50 students spent on their homework.
time (t) in minuets frequency
0 ≤ t < 30 /7
30 ≤ t < 60 / 27
60 ≤ t < 90 / 12
90 ≤ t < 120 /4
work out an estimate for the mean time the students spent on their home work.
Answer: Mean = 52.8 mins
Step-by-step explanation:
We have lapses of 30 minutes, so we can write the average for each, this means that:
0 < t < 30 can be averaged to the middle of the range: 15 min.
Doing this, we have that:
7 students 15 min
27 students 45 min
12 students 75 min
4 students 105 min.
Now we can calculate the mean:
mean = (x1*n1 + x2*n2 + ...)/N
where x1 is the amount of time 1, and n1 is the number of students associated to that time and so on. N is the total number of students
Mean = (7*15min + 27*45min + 12*75min + 4*105min)/(7 + 27 + 12 + 4)
Mean = 52.8 mins
4)
Express in simplest form:
Ian needs to replace two concrete sections in his sidewalk, as modeled below. Each section is 36 inches by
36 inches and 4 inches deep. He can mix his own concrete for $3.25 per cubic foot. How much money will it cost Ian to replace the two concrete sections?
Answer: $19.5
Step-by-step explanation:
Hi, to answer this question we have to apply the next formula:
Volume of a rectangular prism = width x length x height
Replacing with the values given:
Since 1= 1/12 foot
36 in /12 = 3 foot (length and wifth)
4 in /12 = 1/3 foot (height)
V = 3 x 3 x 1/3 = 3ft3
Next, we multiply it by 2 (since there are 2 sections):
3 x 2 = 6 ft3
Finally we multiply it by the cost of each cubic foot:
6 x 3.25 = $19.5
Feel free to ask for more if needed or if you did not understand something.
A parallelogram has
four sides that are the same length. Is it a square?
Explain how you know.
Answer:
Step-by-step explanation:
Yes it is
Answer:
yes
Step-by-step explanation:
because a square has two pairs of parallel sides, four right angles, and all four sides are equal. It is also a rectangle and a parallelogram. A rhombus is defined as a parallelogram with four equal sides.
also can u plz mark me as brainliest ;w; ^w^
Help looks like i forgot to read a ruler
Answer:
4 1/8
Step-by-step explanation:
It is in between the four and 4 1/4 mark, so it is 4 1/8 :)
Answer:
4 1/8
Step-by-step explanation:
I checked it over. My god. Can’t believe I could not figure it out. This is 2nd grade math. No 3rd
Solve this please with an explanation of process your finding the values of x and y
Congruent sides, so isosceles triangle. When we have an isosceles triangle the bisector of angle A is a perpendicular bisector of BC with foot D. So x=ADB=90 degrees.
Angle B is 47 degrees and angle y=BAD is complementary, the other acute angle in a right triangle.
y = 90 - 47 = 43
Answer: x=90, y=43
what is the volume of this figure ??
Answer:
210 cm³
Step-by-step explanation:
The formula for the volume of a rectangular prism is:
V = lwh
where l is the length, w is the width, and h is the height
Let's substitute the given values into this equation:
V = lwh
V = (5)(6)(7)
Multiply:
V = (5)(6)(7)
V = (30)(7)
V = 210
Therefore, the volume of the prism is 210 cubic centimeters.
can someone please help me with this I'm struggling.
Answer:
x= 6°
Step-by-step explanation:
∠DEF +∠EFD= ∠EDG
(ext. ∠= sum of int. opp ∠s)
9x +7° +70°= 21x +5°
21x -9x = 77° -5° (bring x terms to one side)
12x= 72° (simplify)
x= 72° ÷12
x= 6° (simplify)
helphelphelphelphelphelphelphelphelphelp
Answer:
8*15 + 3*5
Step-by-step explanation:
The CD's are 15 dollars each
She buys 8
8*15
The tapes are 3 dollars each
She buys 5
3*5
Add them together
8*15 + 3*5
Which statement is equivalent to multiplying a number by 10^3
Answer:
adding 3 zeros or moving the decimal point 3 spaces to the right.
Step-by-step explanation:
2xyx + 3z - z when x = -1 and y = -2 and z = 3
Brainiest please
Answer:
2
Step-by-step explanation:
2(-1)(-2)(-1)+3(3)-3= 2
Hope this helps you
can anybody answer this pls.
Answer:
Pls attach an image
Step-by-step explanation:
Press the paperclip and attach an image
Hope this helps!!!
Figure b is a scale image of figure a as shown:enter the scale factor applied to figure a to produce figure b
Answer:
figure B is a scale 3:1 image of figure A
Step-by-step explanation:
9/3=3
15/5=3
12/4=3
scale 3:1
Hence triangle is scaled by multiple of 3.
What is scaled image ?When we talk of two triangles ABC and DEF, they are said to be scaled if both they follow [tex]\frac{A}{D}= \frac{B}{E} =\frac{C}{F}[/tex] where all sides have same common difference.
How to solve?Let triangles with sides 12,15,9 be ABC and triangle with sides 4,5,3 be DEF.
Now A/D=12/4=3
similarly B/E=15/5=3
and C/F=9/3=3
Hence , triangle is scaled by multiple of 3.
Learn more about scaled triangleshttps://brainly.com/question/2826496
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BRAINLIEST IF ALL ARE CORRECT!
A) How many 4-digit numbers are multiples of BOTH 2 and 5?
B) How many 4-digit numbers are multiples of at least one of these two numbers: 2, 5?
C) How many 4-digit numbers are neither multiples of 2 nor multiples of 5?
Answer:
A) 900
B) 5400
C) 3600
Step-by-step explanation:
A) Number of 4 digit multiples of 5:
(9999-1000+1)/5= 1800
[I added one to the 9999-1000 because it includes 9999]
Now, out of those 1800 numbers that are divisible by 5, 900 of them are even. (so they are divisible by 10 [or 5 and 2])
Therefore, the answer to A is 900
B) Number of 4 digit multiples of 2:
(9999-1000+1)/2= 4500
This means that there are 4500 even 4 digit numbers.
We have already figured out that there are 900 numbers that are divisible by both 5 and 2. 1800-900=900 4-digit numbers that are not divisible by 2, but are divisible by 5.
So if we add the 4500 (numbers that are divisible by 2) and the 900 (numbers that are only divisible by 5, but not 10), we get 5400.
C) There are 9999-1000+1= 9000 4-digit numbers. We know that there are 5400 numbers that are divisible by either 5 or 2, so 9000-5400=3600
Feel free to ask any questions! :)
Answer:
Yeet so you can give him
Step-by-step explanation:
Old McDonald had a farm. In one pen the old farmer had chickens and bulls together. In that pen there were 40 animals in total, but there were 130 legs. Can you figure out how many chickens and bulls are in that pen?
Answer:
There are 15 numbers of chicken and 25 numbers of bulls.
Step-by-step explanation:
The pen had chickens and bulls. The pen contains 40 animals in total. The number of legs in the pen is 130 .
Let
a = number of chicken
b = number of bull
a + b = 40................(i)
A chicken has 2 legs and a bull has 4 legs.
The total legs can be represented as
2a + 4b = 130...........(ii)
combine the equation
a + b = 40................(i)
2a + 4b = 130...........(ii)
a = 40 - b
insert the value of a in equation(ii)
2(40 - b) + 4b = 130
80 - 2b + 4b = 130
80 + 2b = 130
2b = 130 - 80
2b = 50
divide both sides by 2
b = 50/2
b = 25
Insert the value of b in equation (i)
a + b = 40
a + 25 = 40
a = 40 - 25
a = 15
There are 15 numbers of chicken and 25 numbers of bulls.
Which statement is true regarding the parallel and
perpendicular lines in the diagram?
Ok || n and w
m
Ok | nand n
Im
Ο ω
n and n
IL
m
1
Ow || n and w
1
m
Answer:
the first one
Step-by-step explanation:
The correct option is B, k || n and n ⊥ m statement is true regarding the parallel and perpendicular lines in the diagram.
What is coordinate system?A coordinate system is a system that uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements.
Parallel lines are lines in a plane that are always the same distance apart.
The perpendicular lines are two lines that intersect each other and the angle formed between the two lines should be equal to 90 degrees
When the distance between the lines is constant then the lines are called parallel lines.
The lines do not intersect when they are separated from each other. And the slope of the lines is equal.
In the graph, the line k is parallel to the line n and the line n is perpendicular to line n.
k || n and n ⊥ m.
Hence, the correct option is B, k || n and n ⊥ m statement is true regarding the parallel and perpendicular lines in the diagram.
To learn more on Coordinate system click:
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If 2a=3b and 4a+b=21, then b =
Answer:
b=3
Step-by-step explanation:
2a=3b and 4a+b=21,
Multiply the first equation by 2
2(2a) = 2*3b
4a = 6b
Substitute this into the second equation
4a+b = 21
Replace 4a with 6b
6b+b = 21
Combine like terms
7b = 21
Divide each side by 7
7b/7 = 21/7
b = 3
Of the 20 plants in Melissa's
vegetable garden, 7 are herbs.
What percent of the plants in
Melissa's garden are herbs?
Answer:
35 % are herbs
Step-by-step explanation:
7 = 35
20 = 100
which quadrilateral has equal diagonals
A.parallelogram
B.rhombus
C.trapezoid
D.rectangle
E.none
Answer: D
Step-by-step explanation:
All of it’s angles are equal
Answer: A:Parrallelogram
Step-by-step explanation:
3. Juanita wants to buy a computer. She needs to earn at least 400 dollars. If she makes 9
dollars an hour and has already saved 40 dollars, how many hours does she need to
work?
Answer:
40 hours
Step-by-step explanation:
9x + 40 = 400 (with x being how many hours she has worked). We get rid of the 40 on both sides by subtraction. Our new equation is 9x = 360. Now we divide 9 on both sides and we learn that x = 40.
Plz answer this 6th grade question
Answer:
the answer is 12 times
Step-by-step explanation:
to get from 2 to 6, you have multiply 2 by 3 for 6. so 4 times 3 is 12, and also just 6 times 2 can do it too!
I need to find AB. The options are
A. 25m
B. 64m
C. 32m
D. 30m
for me the answer to that is c
Multiply.
(7a-1)(x^2+2x-5)
Answer:
7ax2+14ax−x2−35a−2x+5
Step-by-step explanation:
(7a+−1)(x2+2x+−5)
=(7a)(x2)+(7a)(2x)+(7a)(−5)+(−1)(x2)+(−1)(2x)+(−1)(−5)
=7ax2+14ax−35a−x2−2x+5
=7ax2+14ax−x2−35a−2x+5
Answer:
Step-by-step explanation:
(7a - 1) (x² +2x -5) =7a*((x² +2x -5) + (-1)*(x² +2x -5)
= 7a*x² + 7a*2x + 7*(-5) +(-1)*x² +(-1)*2x + -5*-1
= 7ax² + 14ax - 35 - x² -2x + 5
= 7ax² - x² + 14ax - 2x -30
Is this right if not correct answer plzzz
Answer:
± 14.
Step-by-step explanation:
If we plug √196 into the calculator, we get 14.
However, every square contains a negative square root as well since multiplying two negative numbers together results in a positive number.
Therefore:
Both 14 × 14 and -14 × -14 are equal to 196.