Answer:
81
Step-by-step explanation:
double digit numbers begin at 10 and end at 99
10 → 19 has 10 double digits
20 → 29 has 10 double digits
and so on up to 90 → 99
that is there are 90 double digits from 10 → 99
double digits with same value are 11, 22, 33, 44, 55, 66, 77, 88, 99
that is 9 double digits with the same value
Then double digits with different values = 90 - 9 = 81
Answer:
81 double digits numbers.
Step-by-step explanation:
From 1 to 99, first 9 numbers are single digit numbers
Double digit numbers = 99 - 9 =90
In this 90 numbers, 11,22,33,44,55,66,77,88,99 have same digits.
90 - 9 = 81
Find the volume of each prism. Please help mee and thank you.
Answer:
Step-by-step explanation:
Which of the following shapes are quadrilaterals?
please help asap I'll make brainliest
Explanation:
A quadrilateral has four sides, and each side is a straight line.
Quad = 4
Lateral = side
This means we go for choices A and C.
Choice B is ruled out because of the curved side on the right.
Choice D is ruled out because it has 5 sides instead of 4.
what ratio is equivalent to 1.5:6
Answer:
2:10:12
Step-by-step explanation:
I multiplied all of the numbers by 2
It doesn't matter what number you multiply the numbers by, as long as you multiply all 3 of them.
Please help with this geometry work asp
Answer:
x=21
y=45
z=101
Step-by-step explanation:
Angles crossing each other are congruent
86=4x+2
84=4x
x=21
Quadrilateral has 360 degrees
86 + 86 + 2y+4 + z-7 = 360
172 + 2y+4 + z-7 = 360
2y+4=94
2y=90
y=45
z-7=94
z=101
mark brainliest please!
I NEED HELP PLEASE I NEED TO KNOW HOW U GOT THE ANSWER PLEASE
Linear is basically a straight line. It can be increasing or decreasing.
Decreasing is when on the graph, when x increases, y decreases.
On the graph, there are two parts that are decreasing. Between -2 and 0, and Between 2 and 4. Let's look at these two.
- For between -2 and 0, the line is not straight. Therefore, it is decreasing and nonlinear. We can check if this is the right answer.
- For between 2 and 4, the line is decreasing. However, the line is straight, which means it is decreasing but linear.
Your final answer is B.
please help me
covert 2km to m
convert 3 decimeter to mm
covert 1km to cm
Answer:
2,000 m
300 mm
100,000 cm
Step-by-step explanation:
Answer:
2 km converted to meters is 2000 meters
3 decimeters converted to millimeters is 300 mm
1 km converted to centimeters is 100,000 centimeters
Find the slant height of a cone of curved surface area 471.3 cm3 and base radius is 10 cm (take pi as 3.142)
Answer:
15
Step-by-step explanation:
471.3 = 3.142×10×H
H= 471.3÷31.42
H=15
Reflect the triangle in the mirror line.
This a a vector please help 30 points please brainliest
Answer:
Option #4:
[tex]X=\left[\begin{array}{ccc}10\\24\end{array}\right][/tex]
Step-by-step explanation:
Start With
[tex]\left[\begin{array}{ccc}5&-2\\2&-1\end{array}\right] \left[\begin{array}{ccc}2\\-4\end{array}\right][/tex]
1. Pivot Element
[tex]P_{1} =a_{1,1}=5[/tex]
[tex]\left[\begin{array}{ccc}5&-2\\2&-1\end{array}\right] \left[\begin{array}{ccc}2\\-24\end{array}\right][/tex]
2. Pivot Element Again
[tex]P_{2} =a_{2,2}=-1[/tex]
[tex]\left[\begin{array}{ccc}-1&0\\0&-1\end{array}\right] \left[\begin{array}{ccc}-10\\-24\end{array}\right][/tex]
3. Get x1 and x2 Values
[tex]\left \{ {{(-1)*x_{1}=(-10)} \atop {(-1)*x_{2}=(-24)}} \right.[/tex]
[tex]-x_{2} = (-24)\\x_{2} = 24\\\\-x_{1} = (-10)\\x_{1} = 10\\[/tex]
4. Get Answer
[tex]x_{1}=10\\x_{2}=24\\\\X=\left[\begin{array}{ccc}10\\24\end{array}\right][/tex]
Solve the following problems mentally and match it to its corresponding solution.
Pls Help
4t = 40
10 + t = 14
70 - t = 30
multiple answers , 40, 10 , 4
Answer:
1. t=102. t=43. t=40Step-by-step explanation:
Isolate the term of t from one side of the equation.
1. 4t=40First, you have to divide by 4 from both sides.
4t/4=40/4
Solve.
Divide the numbers from left to right.
40/4=10
t=102. 10+t=14First, change sides.
t+10=14
Then, subtract by 10 from both sides.
t+10-10=14-10
Solve.
Subtract the numbers from left to right.
14-10=4
t=43. 70-t=30First, subtract by 70 from both sides.
70-t-70=30-70
Solve.
30-70=-40
Rewrite the problem down.
-t=-40
Divide by -1 from both sides.
-t/-1=-40/-1
Solve.
Divide the numbers from left to right.
-40/-1=40
t=40Therefore, the correct answer is t=10, t=4, and t=40.I hope this helps! Let me know if you have any questions.
Answer:
4t =40 t= 10 4x10=40
10 + t = 14 t=4 10 + 4 = 14
70 - t =30 t= 40 70 - 40 = 30
Hope this helps!
Kate's Cupcakes sells cupcakes in boxes of 4. Depending on the type of cupcake, a box can cost at most $20. Let x represent how much each cupcake costs. Which inequality describes the problem?
Answer:
4×<=20
×<=5
AAAAA single Cupcake can cost at most $5.
Step-by-step explanation:
20000 lb equals how many US tons
Answer:
10 us tons
Step-by-step explanation:
Answer:
10 Tons
Step-by-step explanation:
this is becuase 2k or 2,000 lbs is equal to 1 US Ton
simply devide the lbs by 2,000 to get the same amount in US Tons
help me ive been up all night doing math
Answer:
See below ~
Step-by-step explanation:
(a)
The point (8, 28) represents that in the time of 8 minutes, 28 cm of the horse trough has been filled.
8 minutes 28 centimeters(b)
Finding the unit rate
No. of centimeters / min.28 cm / 8 min3.5 cm/minThe area of a piece of land is 4,951,000 square meters how is this number of square meters written in scientific notation
Answer:
its 4.951 x 106
Step-by-step explanation:
i took the tfar from k12
The area of a piece of land in scientific notation is 4.95 * 10⁶ square meters
How to determine the area of a piece of land in scientific notationfrom the question, we have the following parameters that can be used in our computation:
Area = 4,951,000 square meters
To write the area in square meters in scientific notation, we have
Area = 4.95 * 1,000,000 square meters
So, we have
Area = 4.95 * 10⁶ square meters
Hence, the area is 4.95 * 10⁶ square meters
Read more about scientific notation at
https://brainly.com/question/34659710
#SPJ3
select 3 ratios that are equvilant to 5:2
Answer:
10/4
15/6
20/8
Step-by-step explanation:
Simplify Each Radical Expression. Leave in radical form. (Do not use decimals.)
4. √(5) * √(5) * √(9)
[tex]\sqrt 5 \cdot \sqrt 5 \cdot \sqrt 9\\\\=\left( \sqrt 5\right)^2 \cdot \sqrt{3^2}\\\\=5\cdot 3\\\\=15[/tex]
Solve for x. The triangles in each pair are similar.
Step-by-step explanation:
similar triangles means that all angles in one triangle are exactly the same as the angles in the other triangle.
and the lengths of all sides of one triangle have the same scaling factor with the lengths of the sides of the other triangle.
so, when we compare the "features" of the triangles, we see that C corresponds to S, B to R and D to T.
so, DC (50) corresponds to TS (70).
and that means that CB (60) corresponds to SR (11x - 4).
the scaling factor from BCD to RST is 70/50 = 7/5.
that means DC × 7/5 = TS.
and CB × 7/5 = SR :
60 × 7/5 = 11x - 4
12 × 7 = 11x - 4
84 = 11x - 4
88 = 11x
x = 8
Help help pls pls!!!
Answer:
b
Step-by-step explanation:
eg2022
Find the volume of each composite figure please help
A rectangular prism has a base of 15 ft2 and a height of 9 ft. What is the volume of the rectangular prism?
Answer:
135 ft^3
Step-by-step explanation:
Volume of a rectangular prism is basically just width x height x depth. So the area of the base multiplied by the height. 15 x 9 = 135
Answer: 135 ft³
Step-by-step explanation:
Volume, when dealing with a rectangular prism, is L * W * H
-> L * W can simplify to the base, as it does in the problem given to us.
V = (L * W) * H
V = B * H
V = 15 * 9
V = 135 ft³
The rectangular prism has a volume of 135 ft³.
Jason went shopping.
he bought a watch and a pair of trainers for a total price of £53.55
This price includes a 15% loyalty discount.
before the discount, the trainers were priced at £38.
work out the price of the watch before the discount
Answer:
£25
Step-by-step explanation:
100 - 15 = 85
53.55 ÷ 0.85 = 63
63 - 38 = 25
3. A scale drawing of a park is shown.
2.5 in
1.5 in
Scale: 1 in = 15 yd
If the scale is changed from 1 inch to 10 yards, which will be the scale drawing of the park?
A.
3.75 in
2 in
2.25 in
in
3
3 in
1.875 in
2 in
1.125 in
Answer: a
Step-by-step explanation:
Converting using the scale 1 in = 15 yd, we get that the dimensions of the park are 22.5 inches by 37.5 inches.
So, converting this back using 1 inch to 10 yards, we get dimensions of 2.25 inches by 3.75 inches.
Complete the square to find the
vertex of this parabola.
x² - 12y - 6x + 5 = 0
?]
-H
Kendra is a professional diver. She practices between 80-100 dives before every competition. About how many dives will she practice if she has 12 competitions?
Answer:
She will practice about 960-1200 dives before those competitions in total
Step-by-step explanation:
All you have to do is multiply the number of dives by the number of competitions she has.
The thickness of a book varies directly with
the number of pages in the book. A book is
1.8 cm thick and contains 350 pages. What is
the thickness of the first 84 pages of the book?
[tex]\qquad \qquad \textit{direct proportional variation}\\\\\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad \stackrel{\textit{constant of variation}}{y=\stackrel{\downarrow }{k}x~\hfill }\\\\\textit{\underline{x} varies directly with }\underline{z^5}\qquad \qquad \stackrel{\textit{constant of variation}}{x=\stackrel{\downarrow }{k}z^5~\hfill }\\\\[-0.35em]~\dotfill[/tex]
[tex]\stackrel{\textit{"th" varies directly with "p"}}{th=kp}\qquad \textit{we also know that} \begin{cases} th=1.8\\ p=350 \end{cases} \\\\\\ 1.8=k(350) \implies \cfrac{9}{5}=350k\implies \cfrac{9}{1750}=k~\hfill \boxed{th=\cfrac{9}{1750}k} \\\\\\ \textit{when p = 84, what is "th"?}\qquad th=\cfrac{9}{1750}(84)\implies th=\cfrac{54}{135}\implies th=0.432[/tex]
What is the value of B for the following triangular prism?
It would be 48ft2. If you need help with anything just ask
Which expression is equivalent to 2x^2-10x-48in factored form?
Answer: B
Step-by-step explanation:
question is in the picture
Answer:
the avswers are
1. 100,000
2. 10,000
3. 1,000
Step-by-step explanation:
divide the number by one and then keep adding zeros
HELP WILL MARK BRAINLIEST EXTRA POINTS!!!
Answer:
Step-by-step explanation:
All of the angles will equal up to 180
10x-10=180
180+10 is 190
190=10x 190/10=x x=19 or R
<Q: 19*2=38-5=33 <Q:33
<P:133-5=128 <P:128
128+33+19=180,
Double checking to fact check the asnwers.
B
c
а
A
b
Use the diagram above and round your answer to the nearest hundredth.
If a is 6 in. and ZA = 31°, what is b?