Which method would be the best (quickest) for solving the system?
6x + 4y = -10
-6x + 5y = 1
Substitution
Elimination
Answer:
elimination.
Step-by-step explanation:
6x-6x eliminates and then you just have to simplify the expression. then plug whatever you got for y into one of the expressions and then you have an answer.
find the perimeter and area of rectangle JKLM. K(1,5) L(4,2) M(2,0) J(-1,3)
Answer:
perimeter: 10 units
area: 6 square units
Step-by-step explanation:
within the picture point J and point M seem to be 3 units are.
with this assumption, with can infer that both parallel sides are 3 units giving us 6 units for both sides
we can as well as tell that point J and point K seem to be 2 units apart.
with this info we can infer that both parallel sides will be the congruent lenght. which will add up to 4
thus giving us the equation for the area
6 + 4 = (10 units) for the perimeters
for that area we will then do 3 units by 2 units
(3 units for the assumed length and 2 units for the assumed width)
giving us the equation 3×2 = (6 square units)
Out of 10 students, 6 have a dog. Based on these results, how many students would have a dog out of 90 students?
Answer:
54 students would have a dog.
Step-by-step explanation:
If 6 out of 10 students have a dog, then multiplying 10 by 9 and 6 by 9 you will get 90 students having a dog.
By solving the inequality 4.5a < 18, the answer will be
A. a<10
B. a<8
C. a<11
D. a<4
Answer: D plz mark me brainliest (tap the crown on the bottom right of an answer)
Step-by-step explanation: it has to be D because it can't be larger then 4
The inequality by solving the given equation of 4.5a < 18 will be a<4 . Then the correct option will be (D).
What is inequality?A difference between two values indicates whether one is smaller, larger, or otherwise not identical to the other.
Equations are not always balanced on both sides by using equal symbols in mathematics. Sometimes it can be about something like a not equal relationship, meaning that something is preferable to or lower than the next.
In another word, inequality is mean that if a number is not equal to the other number then it will be unequal and the constraint of this will make an inequality.
Given that
⇒ 4.5a < 18
⇒ a < 18/4.5
⇒ a<4 hence, the correct option is a <4.
For more information about the inequality
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1. Ryan is washing windows on a skyscraper. He lowers himself six times,
going down an equal distance each time. In all, Ryan lowers himself 48 ft.
What integer represents the change in Ryan's position each time he lowers
himself? *
Answer:
Ryan went down a total of 8 times
Step-by-step explanation:
He goes down 6 times 48/6 = 8
PLEASE HELP ME!!
5% of the tickets were reserved seats that sold for $35 each. What was the total amount in sales for the $35 tickets?
Mr . Oliver purchased 20 baseball cards for $5. a. Find the unit rate per dollar . b. Find the unit rate per card .
pls hurry!! im being timed
Answer: $539
Step-by-step explanation:
Solve the equation to determine that the highest y value you can get is 539 with an x value of 18
PLEASE HELP IM BEGGING YOU!!! Team Integrity kids were supposed to go on a field trip to an ice rink. The cost was $12 per student for tickets, and $10 per student for food. The team paid $50 for buses. Write an expression to represent the total cost of this field trip for the entire team. Identify what your variable represents. *
HELP ME PLZ PLZ PLZ
THX
a sum of money was divided between two friends, karen and Natasha in the ratio 2:5. If Natasha received $120 more than karen, find the sum of money shared
Answer:
$600
Step-by-step explanation:
Let x be the total amount divided
Karen gets (2/7) x
Natasha gets (5/7) x
(5/7) x = (2/7) x + 210
Multiply both sides by 7
5x = 2x + 1470
3x = 1470
x = 490
Natasha gets (5/7) (490) = 350
Karen gets (2/7)(490) = 140
The difference in ration is 5 - 3 = 2. So divide 150 by 2 to get the amount for each part of the ratio which is 75. the total ration is 3 + 5 = 8. So to get the total original sum of money, multiply 75 and 8 which is $600. for each person just multiply 75 with their respective ratios. For A: 75 X 3 = $225. For B: 75 x 5= $375. To check that it is correct add 225 and 375, and you should get 600.
according to my calculations, the starting amount will be 600
Answer:
$280
Step-by-step explanation:
Ratio = 2 : 5
Karen's Share = 2x
Natasha's share = 5x
Natasha received $120 more than karen.
5x = 2x + 120
5x - 2x = 120
3x = 120
x = 120/3
x = 40
Karen's share = 2*40 = $ 80
Natasha's share = 5*40 = $ 200
Sum of money = 80 +200 = $ 280
Fill in the missing spot with the correct fraction.
Answer:
a. [tex]\frac{5}{18}[/tex] b. [tex]\frac{1}{24}[/tex]
Step-by-step explanation:
Miss Lim bought some puzzles for her pupils in the Maths Club. She bought a total
of 40 Tangram puzzles and IQ puzzles. She paid a total of $128. Each Tangram
puzzle cost $4 and each IQ puzzle cost $2. How many Tangram puzzles did she buy?
Answer:
She bought 24 Tangram puzzles
Step-by-step explanation:
Let the number of Tangram puzzles be t and the number of IQ puzzles be i
The sum of all the puzzles is 40;
i + t = 40 ••••••(i)
Cost of all Tangram puzzles at a cost of $4 per one will be;
4 * t = $4t
cost of all Iq puzzles at a cost of $2 per one is
2 * i = $2i
Sum
paid for all is $128
so;
4t + 2i = 128 •••••••(ii)
From equation i;
i = 40-t
Substitute into ii
4t + 2(40-t) = 128
4t + 80 - 2t = 128
2t = 128-80
2t = 48
t = 48/2
t = 24
The volume of the square pyramid is ___ cubic centimeters.
Answer:
The volume of the square pyramid is 1,125 cubic centimeters
Step-by-step explanation:
From the diagram in the question, we have;
The height of the pyramid, h = 8 cm
The side length of the square base of the pyramid = 15 cm
The area of the square base of the pyramid, A = 15 cm × 15 cm = 225 cm²
The volume of a pyramid = 1/3 × A × h
Where;
A = The base area of the pyramid
h = The height of the pyramid
Therefore, the volume of the square pyramid, V = 1/3 × A × h
∴ V = 1/3 × 225 cm² × 15 cm = 1,125 cm³
The volume of the square pyramid, V = 1,125 cm³
15. Circle all of the expressions equivalent to 9x - y.
A (3x2 - y)
B. (3x)2-0)
C 9(x2)-6)
D. (932) 2-6)
E. (3x2 + y)(3x2-y)
Answer:
I believe a is One of them
Subtract 2.2 and 41.5
Answer:
if you're doing 2.2 - 41.5 your answer is - 39.3
if you're doing 41.5 - 2.2 your answer is 39.3
Step-by-step explanation:
i need your guys help i don’t know nun abt this at all
Answer:
1) 2² + 5² = ?²
2) 6² + ?² = 9²
3) 8² + 16² = ?²
4) 8² + ?² = 10²
Step-by-step explanation:
Because these are all right triangles, we can use the Pythagorean Theorem:
a² + b² = c²
Where c is the hypotenuse, the longest side of the triangle. It can be identified as being across from the right angle of the right triangle.
The legs are the two other sides of the triangle and they are interchangeable when placed in the Pythagorean Theorem.
The answer for this question is C
Answer:
yes good job :))
Step-by-step explanation:
* please mark brainliest *
Pls help me with this text thing i need the answers :O PLS I NEED IT NOW HELP
Answer:
1. d.9
2.
3.
Step-by-step explanation:
that is the only one I know sorry
4. The length of a rectangle is represented by 8x-3. The width of the
rectangle is represented by 2x. The perimeter is 34 centimeters. Which
equations represent the perimeter? Choose all the correct answers.
A. 4(2x+8x-3)=34
B. 2(2x)+2(8x-3)=34
C. 2x+8X-3+2x+8x-3=34
D. 20x-6=34
E. 2x(8x-3)=34
I NEED THIS ASAP!!!!!
Answer:
B, C, & D
Step-by-step explanation:
Which expression can be used to model the phrase "the sum of three and a number"? O 3 + x O x minus 3 O 3 minus x O x times 3
Answer:
3 + X
Step-by-step explanation:
Is your aljebra expression.
Answer:
the answer is a
Step-by-step explanation:
14 + w is the same as which expression?
A
14w
B
14-W
С
W + 14
D
W - 14
Answer:
I think it's w + 14? :3
AND I THOUGHT I SAW A KUNIMI PFP-
Step-by-step explanation:
:3
PLS HELP ME IM AWARDING BRAINLIEST!
Answer:
First option: 336
Step-by-step explanation:
To find the answer, separately solve for each of the shapes.
1. The base is the square so length times width is the formula:
12 x 12 = 144
144 is the area of the square
Next, find the 4 triangles which are congruent(the same).
Triangle area formula: Base x Height divided by 2.
So, the area of 1 triangle is 12 x 8 =96
96/2 = 48
Area =48
Because there are 4 triangles, do 48 x 4=192.
Finally, add the area together and you should get 192+144 =336 ft^2
Surface area = 336 ft^2
The value of k lies between 2.2 and 2.3.
Select all possible values of k.
1.49
4.8
5
5.04
5.3
6
Answer:
None of them are possible because none of them lie between 2.2 and 2.3.
Answer:
its 5.04 and 5
Step-by-step explanation:
Work out the size of angle x.
126°
43°
Answer:
the answer is 83°
Step-by-step explanation:
by the sum of iner and outer angle=180°
180-126= 54°
x=180-43+54
x=180-97
x=83°
The measure of angle x is 43°.
What is Triangle?
A triangle is a three sided polygon , which has three vertices.
Given that;
In triangle, The value of interior angles are 43° and x°.
And, An exterior angle is 126°.
Since, The sum of two interior angles is equal to the exterior angle of same triangle.
Hence, We can formulate;
43° + x = 126°
Subtract 43° both side;
43° + x - 43° = 126° - 43°
x = 83°
Thus, The measure of angle x is 43°.
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ppppppplllllzzzzzzzzzz huuuuuuurrrrrryyyyyyyyyyyy What is missing from the frequency chart below?
A. the tallies are missing
B. the title is missing
C. the total is missing
D. there is nothing missing
Answer: A
Step-by-step explanation:
A
I think, i looked it up, im sorry if im wrong. I tried.
Answer:
A
Step-by-step explanation:
The Jayden family eats at a restaurant that is having a 15% discount promotion. Their meal costs $78.48 before the discount, and they leave a 20% tip. If the tip applies to the cost of the meal before the discount, what is the total cost of the meal? Round your intermediate calculations and answer to the nearest cent.
how much does the meal cost?
Answer:
Step-by-step explanation:
c=t+p
c=0.2(78.84)+(1-0.15)(78.84)
c=0.2(78.84)+0.85(78.84)
c=15.768+67.015
c=15.77+67.02
c=$82.79
Claire's backyard is in the shape of a rectangle and has a length of 19.5 feet. It cost her $945 to fence in the yard. If fencing costs $15 per foot, what is the width of Claire's backyard?
Answer:
Step-by-step explanation:
You need to know the formula for the perimeter of a rectangle. We won't use it right away, but it is pertinent information.
P = 2 ( l + w )
Now, we know that the fencing costs $15.00 per foot, and that the length is 19.50 feet.
We first need to find the price of one "length" side of the fence.
To do this, multiply 19.50 by 15.00
19.50 x 15.00 = 292.5
Next, we look at the perimeter equation to see what we can plug in where.
P = 2 ( l + w )
We can put in the total price of the fencing for the yard as P, and the amount of one length side of the fence as l.
945.00 = 2 ( 292.5 + w )
And now, we simply solve for w.
945.00 ÷ 2 = ( 2 ( 292.5 + w ) ) ÷ 2
472.5 = 292.5 + w
472.5 - 292.5 = 292.5 + w - 292.5
w = 180
It costs $180 for one "width" side of the fence.
To find out how many feet that is, we do the opposite of what we did with the length. Instead of multiplying by $15.00, we divide by $15.00
$180.00 ÷ $15.00 = 12
The width of Claire's backyard is 12 feet.
A person's height is 5-ft 3-in. Their shadow has a length of 3-ft 6-in. If a nearby tree has a shadow of length 10-ft 4-in, what is the approximate height of the tree?
Answer: The height of tree = 15 ft. 6 inches
Step-by-step explanation:
Given: A person's height is 5-ft 3-in = [5 x (12 )+3 ] inches [ 1 ft= 12 inches]
= 63 inches
Their shadow has a length of 3-ft 6-in = [3 x 12+6] inches
= 42 inches
If a nearby tree has a shadow of length 10-ft 4-in = [10 x 12+4] inches
= 124 inches.
At the same time,
[tex]\dfrac{\text{Height of tree}}{\text{Height of person}}=\dfrac{\text{Length person's shadow}}{\text{Length of tree's shadow}}\\\\\dfrac{\text{Height of tree}}{63}=\dfrac{124}{42}\\\\\Rightarrow\ \text{Height of tree}=\dfrac{124}{42}\times63=186\ inches\\\\=\dfrac{186}{12}= 15.5 ft\ or\ 15 ft.\ 6\ inches.[/tex]
Hence, the height of tree = 15 ft. 6 inches
Someone please help me quick I've been stuck on this problem for 2 hours and my assignment is due at 10:30pm.
A writing job requires the following lengths of BX cable:
12 pieces 8 1/2 ft long
7 pieces 18 1/2 ft long
24 pieces 1 3/4 ft long
12 pieces 6 1/2 ft long
2 pieces 34 1/4 ft long
How much cable is needs to complete the job?
please answer step-by-step please, thank you
Answer:
419.5 ft of BX cable
step-by-step explanation:
12x8.5ft= 102 ft
7x18.5 ft= 129.5ft
24x 1.75ft= 42ft
12x 6.5ft=78 ft
2x 34.25= 68.5ft
Add all the answers and you get 419.5 ft
