Complete question is;
A 21 ft ladder is leaning against a tall wall with the foot of the ladder placed at 7 feet from the base of the wall and the angle of elevation is?
Answer:
θ = 70.5°
Step-by-step explanation:
The angle of elevation simply means the angle that the ladder makes with the ground. Let's call this angle θ.
I've attached a diagram showing the triangle made by this ladder and the wall.
From the attached diagram, we can see the triangle formed by the ladder and the wall.
We can find the angle of elevation θ from trigonometric ratios.
Thus;
7/21 = cos θ
cos θ = 0.3333
θ = cos^(-1) 0.3333
θ = 70.5°
Simplify the expression by adding or subtracting the linear expressions. 10x + 5 + 5x + 10 *
15x + 15
10x + 15
5x + 10
20x + 5
In a full set of permanent teeth, 1/4 of the teeth are incisors, 1/4 are premolars, and 3/8 are molars. What fraction of all the teeth are incisors, premolars, and molars
Answer:
7/8
Step-by-step explanation:
In a full set of permanent teeth, 1/4 of the teeth are incisors, 1/4 are premolars, and 3/8 are molars. What fraction of all the teeth are incisors, premolars, and molars?
To solve the above, we add all the fractions together.
= Incisors + Premolars + Molars
= 3/8 + 1/4 + 1/4
Least Common Denominator = 8
= (3 × 1 + 2× 1 + 2 × 1)/8
= 3 + 2 + 2/8
= 7/8
Hence, the fraction of all the teeth are incisors, premolars, and molars is 7/8
Please help me I will give you brainleist if I figure out how
What is the binary number for 24
Answer:
Here im to lazy to solve so a pic
Step-by-step explanation:
Answer
11000
Explanation
I looked it up
i need help i will mark brainliest!! look at the pictures
Answer:
yes
Step-by-step explanation:
the picture is not clear
7th grade math
I will give brainliest to right answer
6 = -4/5 s
what is the value of s
Answer:
[tex]\frac{-4}{5} s = 6\\-4s = 6*5\\-4s = 30\\s = \frac{30}{-4}[/tex]
s = 30/-4 or -7.5
Use synthetic division to solve (2x^3+4x^2-35x+15)/(x-3). What is the quotient?
Answer:
the quotient is 2x^2+10x-5
What is the binary number for 22
Answer:
I believe it is 10110
Step-by-step explanation:
hope this helps
If you are doing a gift exchange, and everyone has to spend at least 10 dollars but less than 20 dollars, what inequality represents the situation
Answer:
10≥x<20
Step-by-step explanation:
Help find domain and range
Answer:
d: 4 r:5
Step-by-step explanation:
for domain the x coordinates doesn't go over -2 on the left or 2 on the right so if u add the units of the space in between it's 4 since 2- (-2)=4
for the range, the y coordinates never goes over 3 or -2 so range is 5 is u add the units in between
I hope that makes sense!
Solve
4x - 9 = 6 - x
Answer:
x = 3
Step-by-step explanation:
The solution to the equation 4x - 9 = 6 - x is x = 1.2 in the decimal form.
Given Equation:
4x - 9 = 6 - x
Add both side x of the equation
4x - 9 +x = 6 - x + x
5x = 6
Now, divide both side by 6 gives
5x/ 5 = 6/5
x = 1.2
Thus, the value of x is 1.2.
Learn more about Equation here:
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b) The circumference of a circular field is 220 m.
(i) Find its diameter and radius.
(ii) Find the cost of paving stones all over it at Rs 25 per sq. m.
Answer:
sorry I don't know 2...
But first I can tell....
Step-by-step explanation:
circumference = 220m
To Find :- It's diameter and it's radius...
Solution:-
circumference of circle = 2*pi*r
pi=22/7
220 = 2*22/7*r
220 = 44r/7
220*7 = 44r
1540 = 44r
r = 1540/44
r = 35m....
d = 35*2
d = 70m...
Hence, Diameter of circular field is 70m and radius is 35m
Which number is greater 35, 6.1
I NEED HELP AGAIN PLEASE!!
Answer:
A
Step-by-step explanation:
What is the answer to this question?
will get awarded with brainliest!
(6x-7)(2x+5)
In isosceles ABC, AB=AC. if B=55,calculate A
Answer:
Two base angles of an isosceles triangles are equal.
55 + 55 + a = 180
110 + a = 180
a = 180-110
a = 70
Please help its7to10 it’s easy but I’m lazy
Answer:
sure
Step-by-step explanation:
The drawing of the building, shown below, has a scale of 1 inch to 30 feet. What is the actual height, in feet, of the building?
Answer:
Actual height of the building is 37.5 feet
Step-by-step explanation:
Formula to be used to get the actual length of the building,
Scale used = [tex]\frac{\text{Dimension of image (on map)}}{\text{Dimension of actual}}[/tex] = [tex]\frac{1}{30}[/tex]
By this formula,
[tex]\frac{1.25}{\text{Actual height}}=\frac{1}{30}[/tex]
Actual height of the building = 1.25 × 30
= 37.5 feet
Therefore, actual height of the building will be 37.5 feet.
question in the picture!!
looking for the answer of 1) , 2) and 3)
show your work using numbers!!
Answer:
1. 24%
2. 30%
3. 30%
Step-by-step explanation:
1. 100%/25= 4% 4%*6=24%
2. 100%/50= 2% 2%*15=30%
3. 100%/40=2.5% 2.5%*12= 30%
Find the difference between 15.89 and 8.036
Answer:
7.854
Step-by-step explanation:
the side lengths of a triangle are 6, 8 and 12 is this a right triangle
Answer:
No it is not a right triangle.
Step-by-step explanation:
We calculate the squares of the two littlest sides and add them :
6² + 8² = 36 + 64 = 100
We now calculate the square of the biggest side :
12² = 144
They are not equal, and thus, the triangle is not a right triangle.
Hope this helped! If so, plz mark brainliest.
Answer:
No, Because 6^2 + 8^2 = 12^2
Step-by-step explanation:
What is the rate of inflation if an account has a nominal interest rate of 4.2% and a real interest rate of 2.8%
A. 1%
B. 1.8%
C. 2.4%
D. 1.4%
Answer:
Rate of inflation = 1.4%
Step-by-step explanation:
Given:
Nominal interest rate = 4.2%
Real interest rate = 2.8%
Find:
Rate of inflation
Computation:
Rate of inflation = Nominal interest rate - Real interest rate
Rate of inflation = 4.2% - 2.8%
Rate of inflation = 1.4%
Are u confused, depressed, and need help with homework?
Too bad, so am i
it's ok.
Answer:
true, i feel ya.
Andy divided his one-third jar of equally between 2 projects. What fraction of a jar of paint did Andy use for each project? Explain how to draw a model to find the answer.
Answer:
1/2 of the 1/3 jar of paint is used for each project
Step-by-step explanation:
Provide three character traits that would make you a successful entrepreneur. Explain? I
Answer:
Creative, Motivated, and Passionate.
Step-by-step explanation:
The describe a successful entrepreneur because you have to be creative because being creative helps you become a better problem solver in all areas of your life and work. You have to be motivational because it allows us to change behavior, develop competencies, be creative, set goals, grow interests, make plans, develop talents, and boost engagement. You have to be passionate because being passionate is the energy that keeps us going, that keeps us filled with meaning, and happiness, and excitement, and anticipation.
Arrange the decimals from least to greatest. Choose the letter below that shows the order least to greatest.
5.00 0.55 0.005 5.005 5.5
0.55, 0.005, 5.00, 5.5, 5.005
0.005, 0.55, 5.00, 5.005, 5.5
0.005, 5.00, 0.55, 5.005, 5.5
Answer:
ima guess 3
Step-by-step explanation:
Answer:
the 3rd one
Step-by-step explanation:
0.005, 0.55, 5.00, 5.005, 5.5
brainlyest?
7) Norachai spent $13 on a magazine and some erasers. If the
magazine cost $4 and each eraser cost $3 then how many erasers did
he buy?
Answer:
3
Step-by-step explanation:
Magazine $4
13-4=9
9/3=3
What are the answers
Answer:
81 for the first blank and 12 for the second.
Step-by-step explanation:
The rule is divie or multiply by 9. (depending on what side its asking)
Is the equation y +1 = 6(x + 5) in point-slope form? Justify your answer.
(select) the equation is equivalent to
Answer:
yes its is slope
Step-by-step explanation:
if f(x)=10x+3 whar is the value when f(x)=19
Answer:
x = 1.6
Step-by-step explanation:
Given f(x) = 10x + 3 and f(x) = 19, then equate right sides, that is
10x + 3 = 19 ( subtract 3 from both sides )
10x = 16 ( divide both sides by 10 )
x = 1.6
Answer:
x = 1.6Step-by-step explanation:
Given
f(x)=10x+3and
f(x) = 19 ⇒ x = ?Solution
10x + 3 = 1910x = 16x = 16/10x = 1.6