Answer: A
Step-by-step explanation:
Ok, some that we always try to do in math is to look for "nice" numbers.
The nice numbers are numbers that are easy to work with.
Examples of these are numbers like 10, 100, etc.
suppose the next example:
9 + 3 + 1 + 7
That may seem a long addition, but we can rearange the numbers in such a way to get:
(9 + 1) + ( 3 + 7) = 10 + 10 = 20
This is specially useful when doing mental calculus.
In the given options, we have:
A) 30 + (-12) + 70
Doing it straightforward, we must:
Subtract 12 from 30, which will give us a not nice number.
30 - 12 = 18
And now add 70 to that:
18 + 70 = 88.
Now, we could use the commutative properety and get:
30 + (-12) + 70 = 30 + 70 + (-12)
in this way, in the first addition we get to 100, and then we subtract 12 units.
(30 + 70) + (-12) = 100 - 12 = 88.
Then the correct option is A.
I’m begging someone to pleaseeee helppp I don’t get it and it’s for a grade :/
Given that y is directly proportional to x.
[tex] \sf y \propto x[/tex]
[tex]\longrightarrow \sf y = k \times x[/tex]
[tex]\\[/tex]
At first, we must find the value of k.
We have a relation given between 'x' and 'y' (that is, when 'x' is 75, 'y' is 60). We can call that Case - 1.
[tex]\sf 60 = k \times 75[/tex]
[tex]\longrightarrow \sf k = \dfrac{60}{75}[/tex]
[tex]\longrightarrow \sf k = \dfrac{4}{5}[/tex]
[tex]\\[/tex]
Now, we have to find 'x' when 'y' is 480. We can call that Case - 2.
[tex]\sf y = k \times x [/tex]
We are having the value of 'y' and 'k'.
[tex]\longrightarrow \sf 480 = \dfrac{4}{5} \times x[/tex]
[tex]\longrightarrow \sf x = 480 \times \dfrac{5}{4}[/tex]
[tex]\longrightarrow \sf x = 120 \times 5[/tex]
[tex]\leadsto \underline{\boxed{\sf {\pink{x = 600}}}}[/tex]
James made a total of $60 mowing lawn. He charges $12 per lawn. How many lawns did he mow?
Answer:
James mowed 5 lawns.
Step-by-step explanation:
60/12 = 5.
Use the reflexive property of congruence to complete the following statement.
Help
Martin earns $7.50 per hour proofreading ads at a local
newspaper. His weekly wage w can be described by the
equation w = 7.5h, where h is the number of hours worked.
PLEASE HELP!!
The summer fair charges a $25.00 entrance fee and $2.50 per ride.
Create and solve an equation to determine the greatest number of rides can you go on if you only
have $45.00.
Answer:
25.00 + x(2.50)=45.00
Which statement about this mapping is true?
see chart below.
x y
0 1
2 2
4
The mapping does not represent y as a function of x, because 1 x-value is related to 2 y-values.
The mapping does not represent y as a function of x, because there are more x-values than related y-values.
The mapping represents y as a function of x, because each x-value is related to exactly one y-value.
The mapping represents y as a function of x, because each y-value is related to exactly one x-value.
PLEASE HURRY ILL MAKE BRAINLIEST!!!!
What is the value of the rational expression x/x2 -9 when x=-3
Answer:
-7
Step-by-step explanation:
Pls give Brainliest!
EASY 10 POINTS PLEASE HELP
Answer:
the answer is
x=8
Step-by-step explanation:
Simple question, winner gets a prize!
A pool has a walkway around it that is a width of 4 1/2 feet all the way around! The length is 100 feet and the side length is 30 feet, what is the area of the walkway? Work must be shown if there is more than one answer. :)
Answer: OK two different answers.
If the dimensions of the pool are 100 × 30, and the sidewalk is outside that, the area of the sidewalk is 1251 square feet.
If the outside dimensions of the sidewalk are 100 × 30, and the pool is inside that, the area of the sidewalk is 1089 square feet.
Step-by-step explanation: Solution #1: Sidewalk outside 100×30 pool.
The sidewalk is 4 1/2 feet wide, so twice as wide all together.
The outside ends of the sidewalk are added to the pool dimensions.
100 + 9 = 109 30 + 9 = 39
The overall area: Multiply 109 × 39 = 4251 ft²
Find the area of the pool 100 × 30 = 3000 ft²
Subtract the area of the pool from the overall area 3000 - 2451 = 1251
1251 square feet is the area of this sidewalk
Solution #2: Pool inside 100×30 sidewalk.
The sidewalk is 4 1/2 ft wide so the pool will be 9 feet shorter in length and width,
100- 9 = 91 and 30 - 9 = 21 The area of this pool is 91 × 21 = 1911 ft²
The overall area is 100 × 30 = 3000 ft²
Subtract the pool's area from the overall area
3000 - 1911 = 1089
The area of this sidewalk is 1089 square feet
A partir de la sucesión: -3, -6, -9, -12, -15, ... a) ¿Cuál es el número que se localiza en la posición 20? b) ¿Cuál es el número que se localiza en la posición 150? c) ¿Cuál es la regla general de la sucesión? d) ¿Cuál es el número que se localiza en la posición 528?
Answer:
a) -60
b) -450
c) Esta es una secuencia aritmética
La fórmula se da como:
an = a1 + (n -1) d
Donde a1 = primer término
d = diferencia común
n = enésimo término
d) -1584
Step-by-step explanation:
De la secuencia: -3, -6, -9, -12, -15, ...
Esta es una secuencia aritmética
La fórmula se da como:
an = a1 + (n -1) d
Donde a1 = primer término
d = diferencia común
La diferencia común para la secuencia anterior es:
Segundo término - Primer término
= -6 - (-3)
= -6 +3
= -3
Primer término = -3
a) ¿Cuál es el número que se encuentra en la posición 20?
Se nos pide que encontremos el término 20
a20 = -3 + (20 - 1) -3
= -3 + (19) -3
= -3 -57
= -60
b) ¿Cuál es el número que se encuentra en la posición 150?
Debemos encontrar el término 50
= a150 = -3 + (150 - 1) -3
= -3 + (149) -3
= -3 -447
= -450
c) ¿Cuál es la regla general de sucesión?
Esta es una secuencia aritmética
La fórmula se da como:
an = a1 + (n -1) d
Donde a1 = primer término
d = diferencia común
n = enésimo término
d) ¿Cuál es el número que se encuentra en la posición 528?
Debemos encontrar el término 528
= a528 = -3 + (528 - 1) -3
= -3 + (527) -3
= -3 - 1581
= -1584
Estimate the difference of 19.7 - 6.9
Answer:
13
Step-by-step explanation:
19.7-6.9= 12.8=13
4/5 of the money collected from a fundraiser was divided equally among 8 grades. What fraction of the money did each grade receive?
Answer:
1/10
Step-by-step explanation:
do 4/5 divided by 8
Emily is solving the equation 2(x+9)=4(x+7)+2. Her step are shown.
Click on the first step in which Emily made an error.
A. Step 1: 2(x+9)=4(x+7)+2
B. Step 2: 2x+18=4x+28+2
C. Step 3: 2x+18=4x+26
D. Step 4: -8x=2x
E. Step 5: -4=x
Also explain why answer B is wrong. <3
Answer:
C. Step 3: 2x + 18 = 4x + 26
Step-by-step explanation:
Step 1: Write equation
2(x + 9) = 4(x + 7) + 2
Step 2: Solve for x
Distribute: 2x + 18 = 4x + 28 + 2Combine like terms: 2x + 18 = 4x + 30Here we see that Emily made a mistake here. Instead of adding 2 to 28 and getting 30, Emily subtracted 2 from 28 to get 26. Hence, our answer should be C.
WILLMAKE U BRAINLIEST!!1
what is −9.898979486 as a radicl?
Answer:
You cant make that a radical without an expression
Reagan is making an exact copy of angle R on the ray CD. What MUST be true?
PHOTO ABOVE
HELP!!! I’ll give u a kiss
Answer:
X is the same distance from C as W is from R.
Step-by-step explanation:
i dont know the step by step explanation but i know the answer, because i got it right:)
What’s the product of 0.056 • (-0.004)??
Answer:
−0.000224
Step-by-step explanation:
1. Solve for x
5x
2x+24
2. Solve for X
(x+16)
(4x-5)
if anyone can help i would appreciate it sm <3
Answer:
vv
Step-by-step explanation:
vcsdg bbhhddhhhgfv vghjfdy
Answer:
1) answer is 7
2) answer is 8
Move the numbers to the blanks to order them from least to greatest value.
0.4
|-2|
-0.89
1/2
9/8
Take these points! But plz answer my other question which is not hard I just want to know what the question is trying to say!:
https://brainly.com/question/18718770
Answer:
I've Helped! :)
Answer:
thank you so much
Step-by-step explanation:
Triangle D'E'F' was formed after triangle DEF was translated 2 units to the right and 4 units up. Before the translation, what was the location of vertex E?
Answer:
The answer is below
Step-by-step explanation:
Transformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, rotation, dilation and translation
If a point X(x, y) is translated b units up and a units right, the new location is X'(x +a, y + b).
Let us assume the coordinates of the vertex of triangle D'E'F' is at D'(-1, 5), E'(3, 2), F'(5, 8).
Since triangle DEF was translated 2 units to the right and 4 units up, the coordinate of vertex E is at E(1, -2)
24 is 75% of what number.
Answer:
32.
Step-by-step explanation:
using the graph below find the missing value to complete the t chart
Answer:
-5
Step-by-step explanation:
the next coordinate that follows the line lands on 2,-5
Answer:
-5.
Step-by-step explanation:
Just follow the X axis to 2 and then go down to where the line intersects the Y axis at -5
Which one?
A. B. C. or D?
Answer:
D
Step-by-step explanation:
Hope this helps :3
I need help with this please!!!
-8 = -(x = 4)
Answer:
x=4
Step-by-step explanation:
-8 = -(x + 4)
switch sides
divide both sides by -1
simplify(x+4=8)
subtract 4 from both sides(x+4-4=8-4)
x=4
What’s the slope pls answer quickk
Answer:
slope is -1
Step-by-step explanation:
The line is decreasing from left to right, so the slope is going to be negative. If you count down, then move to the right, you would get one down, one to the right continually.
Answer:
y=-1x-2
Step-by-step explanation:
Travis spends $20 for premium food, $10 for treats, $18 for grooming, and $3 for toys for his pet. Write an expression that could be used to determine the amount he spends on these items for his pet over a period of 12 months.
Answer:
492$ per year
Step-by-step explanation:
Add all the given numbers (note: not the months) all money spends
20$ + 10$ +18$ +3$ = 41$ per month
Then multiply in months which is 12.
41$ x 12 = 492$ per year or 12 months
The expression that could be used to determine the amount he spends on these items for his pet over a period of 12 months is,
⇒ 12 x ( $20 + $10 + $18 + $3 )
⇒ $612
What is Addition?The process of combining two or more numbers is called the Addition. The 4 main properties of addition are commutative, associative, distributive, and additive identity.
Given that;
Travis spends $20 for premium food, $10 for treats, $18 for grooming, and $3 for toys for his pet.
Hence, Total amount spend in a month is,
⇒ $20 + $10 + $18 + $3
⇒ $51
Thus, The expression that could be used to determine the amount he spends on these items for his pet over a period of 12 months is,
⇒ 12 x $51
⇒ $612
Learn more about the addition visit:
https://brainly.com/question/25421984
#SPJ2
In the first 4 of 5 consecutive days, Martha delivered
144, 152, 139, and 171 newspapers. How many
newspapers did Martha deliver on the fifth day, if the
average number of newspapers she delivered per day
during the five-day period was 155?
A. 154
B. 162
C. 169
D. 171
Given the number of newspapers delivered by
E. Martha on the first four days, she cannot average
155 per day for the five-day period.
Answer:
C. 169
Step-by-step explanation:
144+152+139+171+169=775
775÷5=155
14. Lines are always
O finite
O solid
O non collinear
O straight
Determine the prime factorization of 235 and 468
Prime Factors of 468 =2, 2, 3, 3, 13
Which is the same as = 22 x 32 x 13
235:235 is a composite number.
Prime factorization: 235 = 5 x 47
hope this help!
PLEASE HELP, DUE SOON!!
Answer:
Always pay attention in class to know the answer. okay shawtie. Always stay positive.❤