Answer:
6 books for $21
Step-by-step explanation:
In order to find the better deal you need to know what the cost is for 1 book corresponding to each deal, you do this by dividing the cost of the books by the total amount of books.
21/6 = $3.5
15/4 = $3.75
You can get books for a better deal by buying 6 books for $21
Answer:
So first we are going to divide,
then we compare and see which is the lower price
15 divided by 4 = 3.75
21 divided by 6 = 3.5
4 books for 15 dollars is better I hoped i did the division right .
If 70% of a number is 126 and 95% of the same number is 171, find 25% of that number.
Answer:
45
Step-by-step explanation:
70%=126
100%=?
100×126=12600÷70
=180
100=180
25=?
25×180÷100
=45
How many distinct variables does the expression below
contain?
2x^5+xy^4-zx
Which equation represents a line which is perpendicular to the line x – 2y = 2?
Answer:
Step-by-step explanation:
x-2y=2
2y=x-2
y=(x-2)/2
so the slope is 1/2
for lines to be perpendicular m1m2=-1 so the line must have a slope satisfying the condition
(1/2)m=-1
m=-2
the only line with a slope of -2 is
y=-2x+5
The equation represents a line that is perpendicular to the line x – 2y = 2 would have a slope of -2. The equation would be y = -2x + 5.
What is a linear equation?A linear equation is an equation that has the variable of the highest power of 1. The standard form of a linear equation is of the form Ax + B = 0.
The given equation of line is
x-2y=2
2y = x - 2
y = (x - 2)/2
so, the slope of the equation is 1/2.
For the perpendicular lines
[tex]m_1m_2=-1[/tex]
So the line must have a slope that satisfies the condition.
(1/2) m = -1
m = -2
Hence, the only line with a slope of -2 is y = -2x + 5.
Learn more about linear equations;
https://brainly.com/question/27056029
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A square picture frame with each side length represented by 3x -
5 has a perimeter of 52 inches. What is the value of x?
A. x = 3
u
B. x = 5
C. x = 6
D. x = 13
Answer:
C. X=6
Step-by-step explanation:
Length of one side =52/4= 13
3X-5= 13
3x = 13+5
X= 18/3
X= 6
Translate the sentence into an inequality. The product of C and 9 is at most -28
Answer:
[tex]9c \leqslant - 28[/tex]
Step-by-step explanation:
Since 9 and c are multiplied together and the product is at most -28, the equation would have to be the one above.
Richard answered 20 out of 25 questions on a test. what percentage of the test questions has Richard answered?
Answer:
80%
Step-by-step explanation:
To find what percent a part is of the whole, divide the part by the whole and multiply by 100%.
percent = 20/25 * 100% = 80%
PLEASE HELP
Dennis read 30% of his book on Tuesday and 1/5
of his book on Wednesday. If he started the book on Tuesday, what fractional part of the book did he have left to read after Wednesday?
Answer:
50%(1/2) I geuss
Step-by-step explanation:
1/5=0.2=20%
20%+30%=50%
50%=1/2(or 2/4,or 3/6)
4x + 7 − 23
In this expression, the coefficient is 4.
True or False
Answer:
True
Step-by-step explanation:
Find the slope and the y-intercept of the graph of the linear equation y=-7x+3
Answer:
The slope is -7 . The y intercept is (0 , 3)
Answer:
x= -1/7y+3/7
Step-by-step explanation:
step 1: −7x+3=y
Step 2: Add -3 to both sides.
−7x+3+−3=y+−3
−7x=y−3
Step 3: Divide both sides by -7.
Five friends went to the zoo.
• Tickets cost $8.50 each.
• Each person purchased a drink for $3.50
• Three of the people had a discount coupon for $2.50 off the cost of admission,
• The friends split the total cost equally.
How much did each person spend?
А A
$10.13
B. $10.50
c С
$11.50
D
$12.00
Answer:
B . 10.50
Why ? Because 8.50+3.50=12 , Then 12 × 5 = 60 , 2.50×3=7.5 , 60-7.5= 52.5 . divide 52.5 by 5 = 10.50 . So each friend paid 10.50
Brendon wants to run 13.8 Miles this week. so far he ran 6.7 miles. how may more m8les does brendon need to run
Answer:
7.1 miles
Step-by-step explanation:
13.8-6.7=7.1
Answer:
7.1 miles
Step-by-step explanation:
subtract 6.7 from 13.8 (13.8 - 6.7)
The high temperatures for a week are shown.
15°, 34°, 17°, 15°, 16°, 8°
Which measure of center, mean or median, would BEST represent the data?
A.
The mean, 17.5, is best because it is the average of all the values in the data set.
B.
The median, 15.5, is best because it represents the middle most value of the data in the set.
C.
The median, 15.5, is best because the center of this data set is affected by outliers.
D.
The mean, 17.5, is best because the center of this data set is affected by outliers.
Answer:
A
Step-by-step explanation:
I know
What is the area of the object above?
A.
129 sq cm
B.
78 sq cm
C.
105 sq cm
D.
111 sq cm
Answer choices
216 cm
247 cm
297 cm
337 cm
Answer:
297
Step-by-step explanation:
calculate the slope line that passes through points (0,3) (2,9)
Will the product of 22.65 x 0.999 be greater than or less than 22.65? Without calculating, explain how you know.
It will be less since as common knowledge, it's a decimal so it'll be a little bit less
HELP ASAP!!!!! 20PTS!!
Answer:
the answer is 80!!!!!!!!!!
Step-by-step explanation:
0.8 as a fraction??
You can give your answer
Answer: 4/5
Step-by-step explanation:
0.8 = 8/10 = 4/5
Answer:
4/5
Step-by-step explanation:
The following information was obtained from independent random samples taken of two populations. Assume normally distributed populations with equal variances. Sample 1 Sample 2 Sample Mean 45 42 Sample Variance 85 90 Sample Size 10 12 The 95% confidence interval for the difference between the two population means is (use rounded standard error) a. -2.65 to 8.65. b. -5.344 to 11.344. c. -5 to 3. d. -4.86 to 10.86.
Answer:
95% Confidence Interval is; ( -5.344 to 11.344 )
Option b) -5.344 to 11.344 is the correct answer
Step-by-step explanation:
Given the data in the question;
Sample 1 Sample 2
x"₁ = 45 x"₂ = 42
S₁² = 85 S₂² = 90
n₁ = 10 n₂ = 12
df = [ S₁²/n₁ + S₂²/n₂ ]² / [ ((S₁²/n₁)²/n₁-1) + ((S₂²/n₂)²/n₂-1)) ]
we substitute
df = [ 10/10 + 90/12 ]² / [ ((85/10)²/10-1) + ((90/12)²/12-1)) ] = 19.64 ≈ 20
df = 20
with 95% confidence interval
∝ = 1 - 0.95 = 0.05
∝/2 = 0.05/2 = 0.025
now, [tex]t_{\alpha /2,df} = t_{0.025, 20} = 2.086[/tex] { from table }
95% confidence interval for N1 - N2
⇒ (x"₁ - x"₂) ± [tex]t_{\alpha /2,df}[/tex] × √( S₁²/n₁ + S₂²/n₂ )
⇒ (45 - 42) ± 2.086 × √( 85/10 + 90/12 )
⇒ 3 ± 2.086 × 4
⇒ 3 ± 8.344
so;
Lower Limit = 3 - 8.344 = -5.344
Upper Limit = 3 + 8.344 = 11.344
Therefore, 95% Confidence Interval is; ( -5.344 to 11.344 )
Option b) -5.344 to 11.344 is the correct answer
Simplify the following expression
6y + 8 - 2y + 5y - 9
Answer: 9y-1
:))))))))))))))))))))
Can someone please help me
Answer:
135ft^3
Step-by-step explanation:
Volume for triangular prism = 1/2bhl
v=1/2*6*5*9= 135
Iodine-131 has a half-life of 8 days. How much would be left of an original 40 g sample after 40 days?
a) 32g
b) 8g
c) 131g
d) 1.25g
e) 0.8g
Answer:
d) 1.25 g
Step-by-step explanation:
If it has a half life of 40 days, there will be 5 half-lives in that span of time so if you divide 40 by 2, 5 times or just [tex]\frac{40}{2^{5} }[/tex], it will equal 1.25.
[tex]\frac{40}{2}=20\\[/tex]
[tex]\frac{20}{2} =10[/tex]
[tex]\frac{10}{2} =5[/tex]
[tex]\frac{5}{2} =2.5\\[/tex]
[tex]\frac{2.5}{2} =1.25[/tex]
Answer: 1.25g
Step-by-step explanation:
Got it rght on an assignment
find 2 fractions with a sum that is between 0 and 1/2
Answer:
1/8, 2/8
1/8+2/8= 3/8
0/8<3/8<4/8
Step-by-step explanation:
KIS+KSI=ISK
WHAT IS THE NUMBERS?!?!??!?
If the cafeteria has 80 customers on Tuesday, which prediction for Tuesday is NOT supported by the data in the table
Answer:
the day.
step-by-step: you dont need the day
Answer:
G
Step-by-step explanation:
I need help with this i cant cuaet understand this.
Answer:
CANNOT SEE CLEARLY
Step-by-step explanation:
ollities
Assignment
Active
Calculating a Z-Score from a Percentile
The prices of paperbacks sold at a used bookstore are Complete the sentences.
approximately Normally distributed, with a mean of $7.85 To find the Z-score for the 56th percentile means that
and a standard deviation of $1.25.
the area above the z-score will be
and the
Use the z-table to answer the question.
area below the Z-score will be
The Z-score for the 56th percentile is
V
Answer:
Complete the sentences.
To find the z-score for the 56th percentile means that
the area above the z-score will be ✔ 0.44 and the
area below the z-score will be ✔ 0.56.
The z-score for the 56th percentile is ✔ 0.15
*you typed the question weird, but I hope this helps*
Answer:
To find the z-score for the 56th percentile means that the area above the z-score will be
✔ 0.44
and the area below the z-score will be
✔ 0.56
.
The z-score for the 56th percentile is
✔ 0.15
.
Step-by-step explanation:
edge 2023
1 ) Sara studied a map that showed the routes people followed to explore and settle in Kentucky during the 1700s. The scale on the map showed that ½ inch represents 25 miles. On the map, Sara measures the length of the Wilderness Road to be 4 inches. Based on Sara’s measurement, how long was the Wilderness Road, in miles?
A)50 mi
B)100 mi
C)150 mi
D)200 mi
It takes 7 gardeners 8 hours to plant 1 680 seedlings on a piece of land.
Calculate (in hours and minutes) how long it would take 12 gardeners to
plant the seedlings
Answer:
4 hours, 40 minutes
Step-by-step explanation:
1680 ÷ 8 hours = 210 seeds per hour for 7 gardeners
30 seeds per hour per gardener
30 x 12 = 360 seeds per hour for 12 gardeners
4.66 hours to plant. which is 4 hours and 40 minutes
A person invested 3,900 in an account growing at a rate allowing the money to double every 7 years. How much money would be in the account after 18 years to the nearest dollar
Answer:
23182 or 23181.5109105
Step-by-step explanation: