Step-by-step explanation:
The ratio of red marbles to black marbles = 4 : 7
Total no. of marbles = 77
4x + 7x = 77
11x = 77
x = 77/11
x = 7
The no. of red marbles = 4x
= 4 × 7
= 28
PERSEVERE Find the values of x and y,
y² = 8y - 15 (alternate angles are equal)
y² - 8y + 15 = 0
(y - 5)(y - 3) = 0
y = 5 or 3
x + 8y - 15 = 180 (angles in a straight line add up to 180)
when y = 5
x + 40 - 15 = 180
x = 155°
when y = 3
x + 24 - 15 = 180
x = 171°
4x+7=43 solving two-step equations
Answer: [tex]x = 9[/tex]
Step-by-step explanation:
[tex]4x=43-7 = 36\\x =36/4 = 9\\x = 9[/tex]
the deer population in an an area decreased by 28 each year for 6 years. find the total change in population.
Answer:
168 is the change in population
Step-by-step explanation:
well if u think about it all u really have to do is take 28×6 and it would help u find the change in population
Answer:
The total change is -168.
Step-by-step explanation:
The deer population changed 6 times, and it decreased by 28 each time, so the equation is:
6 times -28 (because the population is decreasing) = -168
Hope this helps :)
At Emily's summer camp, there are
6 counselors for every 40 girls. How many
counselors should the camp have for 100
girls?
Answer:
15
Step-by-step explanation:
3 counselors for every 20 girls
Answer:
15 counselors
Step-by-step explanation:
The ratio of counselors to girls is 6:40. Set this as a proportion:
[tex]\frac{6}{40}[/tex]=[tex]\frac{x}{100}[/tex]
Cross multiply to solve: 6×100=40x
600=40x
x=15
To satisfy the ratio, there needs to be 15 counselors for 100 girls.
1/8 of a number is less than or equal to 3
Answer:
1/8n<3
Step-by-step explanation:
The letter "n" represents the number. Less than or equal to is represented by "<" but with a line under it.
Answer:
1/8n<3
Step-by-step explanation:
Please help I hate doing these.
Answer:
Step-by-step explanation:
a). 3 ...... 8
3 × 8 = 24
3 + 8 = 11
b). n + 1.5 = 6.5 ⇒ n = 5 (across from OR to the left from 1.5)
5 × 1.5 = 7.5 (under the X sign)
Clare knows that Priya has a bunch of nickels and dimes in her pocket and 2 points
that the total amount is $1.25. Write an equation that describes the
relationship between the number of dimes and the number of nickels in
Priya's pocket. Let x represent the number of nickels and y represent the
number of dimes.
Answer:
5x + 10y = 125
Step-by-step explanation:
Let :
Number of nickel = x
Number of dime = y
Nickel = 5 cent
Dime = 10 cent
Total value = $1.25
Total value should be converted to cent since both dime and nickel are both in cent
= $1.25 * 100 = 125 cents
Therefore,
5x + 10y = 125 cents
Can someone help me with these problems
Answer:
a.2
b.2
c.3x
a.3(x+2)
b.-(2-x)
c.3x-2
Answer:
a.3x+6=3 (x+2)
b.x-2=-(2-x)
15x-10/5=3x-2
Find the area of the shape below
Answer:
????
Step-by-step explanation:
Answer:
where's the shape
Step-by-step explanation:
what's the length and width, maybe I can help
Please help me you’ll get brainlest last one!!!!!
5/5
Answer:
Point X is the loacation [tex]\pi[/tex], and is an irrational number
Step-by-step explanation:
[tex]\pi[/tex] ≈ 3.14
it is also a irrational number
find the values of x, y, and z
81
91
99
101
180
What is the answer
Ps I need the answers quick
Answer:
30%
Step-by-step explanation:
first it's on sale for half off
then u have a coupon for 20%
50%+20%=70%
100%-70%=30%
6 x 1/4 Multiply 1/4 how many times? Move from 0 to where. Product:
Answer:
Multiply 1/4 six times.
Start from zero and move 1/4 six times.
Product: 1 2/4 Other equivalent fractions: 2/3, 1 4/8, 18/12
Step-by-step explanation:
1. 1/4
2. 1/2 (2/4)
3. 3/4
4. one whole (4/4)
5. 5/4 ( 1 1/4)
6. 6/4 ( 1 2/4) (1 1/2)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. 1/4 + 1/4 = 2/4
2. 2/4 + 1/4 = 3/4
3. 3/4 + 1/4 = 4/4
4. 4/4 + 1/4 = 5/4
5. 5/4 + 1/4 = 6/4
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1/4 times 6. In other ways..
6/4 1/4 times 6/1 = 6/4
What is the slope of the line from the data shown in the table below? It’s question 9 by the way.
Answer:
Its b
Step-by-step explanation:
It is going up by 10
Use inverse operations to solve the expression. Enter your answer in
simplest form. y/-9 = 1/18
Answer:
mutiply everything by 18
-2y=1
y=-1/2
What is the difference between a histogram and a bar graph?
a A histogram presents information in horizontal bars, while a bar graph presents information in
vertical bars
b. A histogram deals with data which displays a normal distribution, while a bar graph deals with
data in any distribution
c. There is no difference. The two terms are synonymous.
d. A histogram deals with continuous data in ordered columns, while a bar graph deals with
discrete data in separate columns
Answer:
d.
A histogram deals with continuous data in ordered columns, while a bar graph deals with discrete data in separate columns.
Step-by-step explanation:
What is the y-intercept of y = -3 – 7x?
Choose 1 answer:
А
(0,-7)
(В
(0, -3)
(-7,0)
(-3,0)
Answer:
A, sorry if wrong but it can't be b or d
Taylor plans to borrow $4,500 from the bank to purchase a used vehicle. If he borrows the money at a rate of 4% interest for 2 years, what is the total amount he will have to pay back to the bank?
Answer:
$4867.2
Step-by-step explanation:
What is the answer for x?
Answer:
x = 15
Step-by-step explanation:
7x + 5x = 180 (because parallelograms are 360 degrees)
add like terms
12x = 180
divide 12 from both sides
[x = 15]
how many solutions does 3x+5=7x-20 have?
Answer:
1
Step-by-step explanation:
hey there,
< 3x-7x = -20-5
-4x = -25
x = [tex]\frac{25}{4}[/tex]
This isn't a square root or anything like that, so you would really only have 1 answer. I'm not sure what your teacher's referring to, though, but maybe they want decimals/mixed fractions?
But I would just put 1 if I were you. >
Hope this helped! Feel free to ask anything else.
Hello sam hhehehe .dk ;
Answer:
hello
Step-by-step explanation:
need helpp!!
Robert spends $30.45 before tax at the bookstore. If the sales tax rate in his city is 7.25%, what is the total cost of his purchase?
Answer:
$32.65 is the answer.
Step-by-step explanation:
First, we must calculate 7.25% of 30.45.
30.45 x 0.0725 = $2.20
Now, we must add this to the original price
$30.45 + $2.20 = $32.65
Therefore, $32.65 is the total cost of his purchase.
Hope this helps! :)
Answer:
$32.66Step-by-step explanation:
before tax = $30.45
tax sales = 7.25%
total cost = $30.45 x 1.0725
= $32.66
determine which fraction is larger 3/7 or 1/3 find the common denominator
Answer:
LCM is 21[tex]{:}\leadsto [/tex][tex]\sf {\dfrac {3}{7}}[/tex]
[tex]{:}\leadsto [/tex][tex]\sf {\dfrac {3×3}{7×3}}[/tex]
[tex]{:}\leadsto [/tex][tex]\sf {\dfrac {9}{2}}[/tex]
.[tex]{:}\leadsto [/tex][tex]\sf {\dfrac {1}{3}}[/tex]
[tex]{:}\leadsto [/tex][tex]\sf {\dfrac {1×7}{3×7}}[/tex]
[tex]{:}\leadsto [/tex][tex]\sf {\dfrac {7}{21}}[/tex]
____________________[tex]{:}\leadsto [/tex][tex]\sf {\dfrac {9}{21}}\iff {\dfrac {7}{21}}[/tex]
[tex]{:}\leadsto [/tex][tex]\sf {\dfrac{9}{21}} \gt {\dfrac {7}{21}}[/tex]
[tex]\therefore[/tex][tex]\sf {\dfrac {3}{7}} \gt {\dfrac {7}{21}}[/tex]
Graph the line that represents the equation pls
Hey can someone please help quickly thanks!
Answer:
360,000
Step-by-step explanation:
just multiply by 3
Answer:
3,120 second year 3,244.80 the third year.
Step-by-step explanation:
4% of 3,000 is 120
so 3,120 then 3,244.80 the third year after the 4% is compounded
Jonathan worked at McDonalds 20 hours a week and earned $195. Use the equation 20h = 195 to find Jonathan's hourly wage. *
Answer: 9.75
Explanation:
To find your answer, you need to divide 195 by 20, which is 9.75
Difference of Squares gives which complex factors for the expression x2 +3?
A. (x+3)(x-WB)
B. (x-3)(x-3)
C. (x+3)(x-3)?
D. (x+3)(x-31)
Step-by-step explanation:
Shortest way to solve this question is to find the factors of the given expression.
The given expression is (x² + 13).
Now we have to factorize it.
(x² + 13) = x² + (√13)²
= x² + [-(i)²√(13)²] [Since i = √(-1)]
= x² - (i√13)²
= (x - i√3)(x + i√3) [Since (a² - b²) = (a + b)(a - b)]-by-
NEED ANSWER FAST: Write an equation of the line passing through the points (4,16) and (-1, - 14).
Answer:
y=6x-12
Step-by-step explanation:
y2-y1
--------
x2-x1
What is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (2, −1)? y = Negative one-thirdx − One-third y = Negative one-thirdx − Five-thirds y = 3x − 3 y = 3x − 7
Answer:
D, y = 3x − 7
Step-by-step explanation:
Edge 2020, mark as brainliest plz
Answer:
The Answer is D.
Step-by-step explanation:
Andre wants to make a scaled copy of jada drawing so the side that corresponds to 4 units in jada polygon is 8 units of his scaled copy Andre says i wonder if i should add 4 units to lengths of all of the segments what would you say in response to Andre explain or show your reasoning
Answer:
No she should add extra lengths
Step-by-step explanation:
The difference between scaled copy and jada drawing is that it is in the ratio
8:4
2:1
that is the scaled copy is twice as large as the jada drawing itself.
So every dimension is doubled or made twice as large as the initial measurement. Andre should not add 4 units to all sides instead the drawing is made twice as large . It will serve the same purpose of enlarging the drawing while maintaining its shape. If extra mesurements are added the drawing will be changed.