Answer:
Homework is needed for students to practice the material they are learning. The more you practice each new concept, the better you get at it, and the faster you do it. By practicing a lot, you also end up memorizing the way to solve problems.
if 1 cm represents 35 miles what is 1.25 cm in miles?
Answer:
43.75 miles
Step-by-step explanation:
You divide the 35 by 4 and then just add it to the original distance of 35 miles. 35/4=8.75
8.75+35=43.75
Evaluating functions please help :)
Answer:
-28
Step-by-step explanation:
In order to find h(-6) plug in -6 for any "x" in the equation.
So the equation will be h(-6)=5(-6)+2
I just plugged this into my calculator
Hope this is correct and helps! :)
Choose a justification for each step in the derivation of the sine difference identity.
Answer:
Step-by-step explanation:
The missing reasons are Cofunction identity, Cosine difference identity, Cofunction identity, Cosine function is even and sine function is odd respectively.
Given:
The given expression is [tex]\sin (x-y)[/tex].
To find:
The justification for each step.
Explanation:
Cofunction identities:
[tex]\sin\left(\dfrac{\pi}{2}-x\right)=\cos x[/tex]
[tex]\cos\left(\dfrac{\pi}{2}-x\right)=\sin x[/tex]
Cosine difference identity:
[tex]\cos(x-y)=\cos x\cos y+\sin x\sin y[/tex]
Cosine function is even, so [tex]\cos(-x)=\cos x[/tex].
Sine function is odd, so [tex]\sin(-x)=-\sin x[/tex].
We have,
[tex]\sin (x-y)[/tex]
[tex]=\cos\left|\dfrac{\pi}{2}-(x-y)\right|[/tex] Step 1: Cofunction identity
[tex]=\cos\left|\dfrac{\pi}{2}-x+y\right|[/tex] Step 2: Distributive property
[tex]=\cos\left|\left(\dfrac{\pi}{2}-x\right)+y\right|[/tex] Step 3: Associative property
[tex]=\cos\left|\left(\dfrac{\pi}{2}-x\right)-(-y)\right|[/tex] Step 4: Factoring out
[tex]=\cos\left(\dfrac{\pi}{2}-x\right)\cos(-y)+\sin\left(\dfrac{\pi}{2}-x\right)\sin(-y)[/tex] Step 5: Cosine difference identity
[tex]=\sin(x)\cos(-y)+\cos(x)\sin(-y)[/tex] Step 6: Cofunction identity
[tex]=\sin(x)\cos(y)-\cos(x)\sin(y)[/tex] Step 7: Cosine function is even, sine function is odd
Therefore, the missing reasons are Cofunction identity, Cosine difference identity, Cofunction identity, Cosine function is even, sine function is odd respectively.
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Which of the following expressions cannot be simplified?
A) √24
B) √32
C) √27
D) √38
Answer:
C
Step-by-step explanation:
Answer:
The answer is c
Step-by-step explanation:
Find value if x in the figure below
Easy buddy...
[tex]5x - 15 = 3x + 7[/tex]
Subtract the sides of the equation plus 15
[tex]5x = 3x + 7 + 15[/tex]
[tex]5x = 3x + 22[/tex]
Subtract the sides of the equation minus 3x
[tex]5x - 3x = 22[/tex]
[tex]2x = 22[/tex]
Divided the sides of the equation by 2
[tex]x = \frac{22}{2} \\ [/tex]
[tex]x = 11[/tex]
________________________________
And we're done.
Thanks for watching buddy good luck.
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10. A student solves the following problem:
Problem:
2 (x-3) + 3x = 19
2x - 6 + 3x = 19
(2x + 3x) - 6 = 19
5x - 6 - 19
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
5x - 6+ 6 = 19+ 6
5x = 25
X = 5
What property justifies step 4?
a. Commutative Property of Addition
c. Multiplication Property of Equality
b. Addition Property of Equality
d. Substitution
Answer:
Step-by-step explanation:
A.
Option A is correct. The property that justifies step 4 based on the calculation is the Commutative property of addition.
Equations are expressions separated by an equal sign.
Given the equation:
2(x-3) + 3x = 19
Expand the parenthesis using the distributive law
2x - 2(3) + 3x = 19
2x - 6 + 3x = 19
Collect the like terms
2x + 3x -6 = 19
Step 4
Since 2x+3x = 3x+2x = 5x (according to the commutative law), the expression becomes:
5x-6 = 19
Step 5
Add 6 to both sides
5x-6+6 = 19+6
5x = 25
x = 25/5
x = 5
Hence the property that justifies step 4 based on the calculation is the Commutative property of addition.
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A statistics teacher was interested in the relationship between you and the number of days students waited to start a project
and the score that project received (out of 100 points). Information was collected on several students and was used to
obtain the regression equation = -3.64x + 96.5, where x represents the number of procrastination days and 9 is the
predicted grade. What is the predicted grade of a student who procrastinated for 2 days?
0 25.96
0 85.58
O 89.22
0 103.78
Answer:
C. 89.22
Step-by-step explanation:
hope it helps!
edge 2020
QUICK HELP ME 25 POINTS The formula for perimeter of a rectangle is given by: P=2l+2w Rearrange the formula to solve for l
HELP PLZ
Answer:
l = [tex]\frac{P - 2w}{2}[/tex]
Step-by-step explanation:
2l + 2w = P
2l = P - 2w
l = [tex]\frac{P - 2w}{2}[/tex]
I am thinking of a slope equivalent to 1/4→ What are two points from the line? List your coordinate pairs below.
→ Prove that the slope equals 1/4.
[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Mathematics
the points or conditions for the slope to be 1/4 are as
1.) (-2,2) ,(2.3)
2.) (-4,4),(4,6)
Solve the equation x2 + + 7x= 30
O A. x= 15 and x= -2
0 B x=-6 and x = 5
0 C x= -10 and x= 3
O D. x= 10 and x= -3
Answer:
x^2+7x=30
x^2+7x-30=0
Here a=1,b=7 and c=-30
Now,
Discriminant(D)=b^2-4ac
=7^2-4×1×(-30)
=49+120=169
By applying Quadratic formula
x=-b+- root over b^2-4ac÷2a
=-7+- root over D ÷ 2×1
=-7 +- root over 169 ÷2
=-7 +- 13 ÷2
Now,
Either x=-7+13÷2=6÷2=3
Or x=-7 -13 ÷2=-20÷2=-10
Hence, ans is (C) x=-10 and x=3
8x-4 can you guys help me solve for x
Answer:-32
Step-by-step explanation:
8x4=32 add a negative sign
Please help if you can. And please explain
Answer: Choice B) 0.63
==============================================
Work Shown:
1.1 is 174% of what number
1.1 = 174% of what number
1.1 = 174% of x
1.1 = 1.74*x
1.74x = 1.1
x = 1.1/1.74
x = 0.632183908045977 which is approximate
x = 0.63
f(x)=√8+2
Find the range
Answer:
what does f or x mean
Step-by-step explanation:
Which equation represents a proportional relationship
Answer: B y=100/x
Step-by-step explanation:
The slope of a vertical line is....?
a) undefined
b) not enough information given
c) horizontal
d) 0
Which algebraic expression is equivalent to the expression below? (2x + 14) + (8x - 5) *
10x + 19
16x - 3
24x - 5
10x + 9
Find the midpoint of AB if A(-3. 8) and B(-7. -6)
The midpoint of AB is (-5, 1).
To find the midpoint of a line segment AB, we average the x-coordinates of the two endpoints and the y-coordinates of the two endpoints.
Given that A has coordinates (-3, 8) and B has coordinates (-7, -6), we calculate the midpoint as follows:
x-coordinate of midpoint = (x-coordinate of A + x-coordinate of B) / 2
= (-3 + -7) / 2
= -10 / 2
= -5
y-coordinate of midpoint = (y-coordinate of A + y-coordinate of B) / 2
= (8 + -6) / 2
= 2 / 2
= 1
Therefore, the midpoint of AB is (-5, 1), where -5 is the x-coordinate and 1 is the y-coordinate. This means that the midpoint is equidistant from points A and B, dividing the line segment AB into two equal parts.
For more Questions on the midpoint
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what is the measure of the following angle?
AOD
Answer:
it's 80.
Step-by-step explanation:
120-40= 80
....
Answer: 80
Step-by-step explanation:
hope this helps
Alex rents a car for one day. The charge is $18
plus $0.12 per mile. Alex wants to spend exactly
$30. How many miles can he drive?
Answer:
100
Step-by-step explanation:
30 - 18 = 12
12 / .12 = 100
plz mark brainliest if helpful
Miles that alex can drive is 100
What is the unitary method?The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value. Unitary method is a technique by which we find the value of a single unit from the value of multiple devices and the value of more than one unit from the value of a single unit. It is a method that we use for most of the calculations in math.
The calculation is as follows;
Number of days alex rents a car = 1 day
The charge for the car = $18 plus $0.12 per mile
Alex wants to spend; $30
The number of miles he will drive can be calculated as follows
= $30 - $18
= $12
= 12÷0.12
= 100
Therefore, if Alex spends $30 he will drive for 100 miles
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Please help I’ll give brainiest!!
Answer:
-1
Step-by-step explanation:
A basketball player attempted 15 field goals. He scored on 40 percent of his attempts. How many field goals did the player score? NEED HELP BADLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 10/21/2020
Answer:
He scored 6 field goals out of 15
Step-by-step explanation:
40% converted into a decimal is 0.4. "Of" means multiply. So you do 15 times 0.4 and get 6.
I need the answer ASAP
Answer:
i just did this in class a week ago and i think it was option c
Step-by-step explanation:
send help please lol i need help
Answer:
The answer is B
Step-by-step explanation:
The equation equals 2970 and the answer B also equals 2970.
(3.9 x 10^-3) + .0026 in scientific notation
The value of (3.9 × 10⁻³) + 0.0026 in scientific notation is 6.5 × 10⁻³.
What is Decimals numbers?Decimal numbers are numbers which has basically a whole number part and a fractional or decimal part after a point called decimal point.
Decimal number system describes the base 10 number system.
Given are numbers 3.9 × 10⁻³ and 0.0026 added together.
We have to do it in scientific notation.
0.0026 can be written as 2.6 × 10⁻³.
Adding these two numbers together, and taking the common term,
(3.9 × 10⁻³) + (2.6 × 10⁻³) = (10⁻³) (3.9 + 2.6)
= (10⁻³) (6.5)
= 6.5 × 10⁻³
Hence the answer of the sum of (3.9 × 10⁻³) + 0.0026 is 6.5 × 10⁻³ in scientific notation.
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Diana usually drives at average rate of 30 mph. If she drives for 2 hours with the speed that is 10 mph more than usual, what distance will she cover?
Answer: 80 miles
Step-by-step explanation:
10mph + 30mph = 40 mph
Distance = Speed × time
D = 40m/h × 2 h
D = 80 m
The expression equals ___ ?
What is the slope of the line through (-9,6) and (-6, -9)?
Choose 1 answer:
1/5
5
-5
-1/5
I hate algebra
Cayenne bought 20 pencils for 1.60 dollars at that rate how much would 35 pencils cost
Help needed ASAP will give you BRAINLIEST and 5 stars rate :)
Answer:
The bicyclist is travelling at a rate of 20 km/h.
Step-by-step explanation:
When you plug the numbers into the formula (y2-y1/x2-x1=m) you get 20 km/h.
Given the points (2,4),(-2,6),(1,3), and (0,3), categorize the domain and range.
Domain
Range
No Answers Chosen
ING
1
Possible answers:
2
3
All real numbers
-2
0
4
6
2
3
4
Answer: range: 3, domain: 4
Step-by-step explanation:
the range of a problem is basically the difference between the smallest and the largest y value. the largest y value here is 6 and the smallest is 3, so 6-3 = 3 -> 3 is your range! now for domain: the domain of a problem is the difference between the smallest and largest x value. the largest x value is 2 and the smallest is -2, so 2 - -2 = 4 -> the domain is 4! hope this helped!