Answer:
80 hours
Step-by-step explanation:
let d represent doug, let l represent laura
first, set up a system of equations representing the problem:
since doug spent 10 less than twice the hours laura did, and we know that the total amount of hours they spent together is 230:
l=2d+10
d+l=230
then solve:
*first i rearranged the equations so i can solve this system of equations using elimination method*
l-2d=10
l+d=230
*subtract*
3d=240
d=80
so, doug spent 80 hours in the lab
Use the Associative Property of Addition to write an expression equivalent to (u + 2) + 8.
Which expression is equivalent to (u + 2) + 8 by the Associative Property of Addition?
OA. U + 2 + 8
OB. 8+ (u + 2)
OC. (u + 8) + 2
OD. u + (2+8)
Answer:
D
Step-by-step explanation:
First of, associative property of addition is rearranging the parenthesis and not moving the numbers
A is incorrect because you can not take out the parenthesis in the equation
B is inccorrect because they change the position of the number
C is incorrect because they change the position of number
D is correct. It only change the position of the parenthesis
which of the following is NOT a property of all parallelograms
(1) the diagonals are perpendicular
(2) the diagonals bisect each other
(3) opposite sides are congruent
(4) adjacent angles are supplementary
subtract 15/12and 5/6
Answer:
5 / 12
Step-by-step explanation:
You must have common denominators in order to add or, in this case, subtract.
Answer:
[tex] \frac{15}{12} - \frac{5}{6} [/tex]
We have a simple formula that can be reduced We will put it into a combined form [tex]1 \times \frac{3}{12} - \frac{5}{6} [/tex]Find a common numerator [tex]1 \times \frac{3}{12} - \frac{10}{12} [/tex]So our answer is [tex] \frac{5}{12} [/tex]HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
help din HDKE EJFNQKEHWHQODBEHQVEIFNFJRNSJEBSG
Step-by-step explanation:
di ko din alam e AHAHAHAHAHAHAHAHAHA NSKFBWJF S DJEBEJS
JSHEBEJS IF JENSKS.DJWKW
SBWUKWVEUEBJQBRJDNDJXBDJDBDKW
EBEJE KD DJWKQKQBWHS
10
Sara was thinking of a number. Sara adds 19 to it, then doubles it and gets an answer of 39.2. What was the original number?
Answer:
0.6
Step-by-step explanation:
2(x+19)=39.2
x+19=19.6
x=0.6
i will give you brainliest whoever answers correct first!!!
Which of the following is the product of (3x − 5) and (3x + 5)?
Answer:
[tex] {9x}^{2} - 30x + 25[/tex]
[tex]\huge\underline\bold\blue{ƛƝƧƜЄƦ}[/tex]
(3x + 5)(3x - 5)
By using identity
(a + b)(a - b) = a² - b²
3x² - 5²
9x² - 25
Can you name the theorem of the triangle?
A. AAS
B. SAS
C. ASA
D. SSS
12 less than a number , x
A 12 - x
B x - 12
Let that particular no. be x
then,
ATQ,
x -12
Would this be correct ladies and gents
Answer:
You can use the useful mnemonic: SOH CAH TOA to determine what function to use. Since we have information about the hypotenuse (H) and opposite (O), we should use sine (S) for "SOH".
So yes, sine would be correct.
Hope this helps!
The diameter of a circle is 18 cm. Find the circumference to the nearest tenth to the nearest tenth.
c=2πr. r=18/2=9
=2 ×22/7 ×9
=56.6 to the nearest tenth
Please help I’m on a test
“Given the triangle below, what is the longest side length?”
~11.31
Pythagorean Theorem because it is a right triangle.
write in set notation; The et of all real numbers greater than 8 but less than 65
Answer:
{x I 8 < x < 65}
Step-by-step explanation:
{x I 8 < x < 65}
Pls help, thank you :)
Answer:
(3)
Step-by-step explanation:
A number is divided by 3 and decreased by 5 is 6. What is the number???
Answer:
Given : x/3-5=6
answer = 23
Step-by-step explanation:
x-5=6*3
x-5=18
x=18+5
x=23
Answer:
33
Step-by-step explanation:
let the number be n , then the number divided by 3 is [tex]\frac{n}{3}[/tex] and decreased by 5
[tex]\frac{n}{3}[/tex] - 5 = 6 ( add 5 to both sides )
[tex]\frac{n}{3}[/tex] = 11 ( multiply both sides by 3 )
n = 33
The number is 33
S=2(3.14)zx+4(3.14)z^2
Answer:
what do you want to solve for?
Step-by-step explanation:
Can someone tell me what x and y would be
Step-by-step explanation:
20°+120°+I°=180°
I=40°
using sine rule,
I/sin I=x/sinX
12/sin40=x/sin20
x=12sin20/sin40
x=6.4
using similarly and enlargement,
we have, cw/cp=y/120
8/12=y/120
y=80°
ILL GIVE U BRAINLIST!! PLEASE HELP :(
Answer:
5 faces, 8 edges, 5 vertices
HELP ME PLZ I NEED THE FORMULA AND AN EXPLANATION TO THE ANSWERRR
Answer:
[tex]r1 + r2 = r3[/tex]
Step-by-step explanation:
ℎ ℎ ℎ ℎ ℎ
Answer:
This is your answer ☺️. If I'm right so,
Please mark me as brainliest. thanks!!!
Which of the expressions below is true?
a. (3y)2 =3y2 b. 2ab5 = 2(ab)
5
c. (4b)3 = 64b3
d. 2(x)3 = 8x
please help i don't know this one
Answer:
Hey do you know the answer to the question you wrote a while ago?
Step-by-step explanation:
(02.05)
Two similar triangles are shown on the coordinate grid:
A coordinate plane is shown. Triangle XYZ has vertices X at negative 5 comma negative 1, Y at negative 6 comma negative 2, and Z at negative 3 comma negative 2. Triangle X double-prime Y double-prime Z double-prime has vertices X double-prime at 10 comma negative 2, Y double-prime at 12 comma negative 4, and Z double-prime at 6 comma negative 4.
Which set of transformations has been performed on triangle XYZ to form triangle X′′Y′′Z′′?
Do you?? :(
(copy and paste for picture)
If x = 6 units, y = 3 units, and h = 5 units, find the area of the rhombus shown above using decomposition.
A. 45 square units
B. 15 square units
C. 11 square units
D. 30 square units
Answer:
B
Step-by-step explanation:
30
Step-by-step explanation:
did it
This is due in 10 minutes please help me
Given:
The rate of interest on three accounts are 7%, 8%, 9%.
She has twice as much money invested at 8% as she does in 7%.
She has three times as much at 9% as she has at 7%.
Total interest for the year is $150.
To find:
Amount invested on each rate.
Solution:
Suppose x be the amount invested at 7%. Then,
The amount invested at 8% = 2x
The amount invested at 9% = 3x
Total interest for the year is $150.
[tex]x\times \dfrac{7}{100}+2x\times \dfrac{8}{100}+3x\times \dfrac{9}{100}=150[/tex]
Multiplying both sides by 100, we get
[tex]7x+16x+27x=15000[/tex]
[tex]50x=15000[/tex]
Dividing both sides by 50, we get
[tex]x=\dfrac{15000}{50}[/tex]
[tex]x=300[/tex]
So, the amount invested at 7% is [tex]300[/tex].
The amount invested at 8% is
[tex]2(300)=600[/tex]
The amount invested at 9% is
[tex]3(300)=900[/tex]
Hence, the stockbroker invested $300 at 7%, $600 at 8%, and $900 at 9%.
find the greatest common divisor of the numbers 96 and 212
Answer:
The GCF of 96 and 212 is 4.
Veronique's Unique Boutique reported the following information for 2021:
Net Cash Provided by Operating Activities
Net Increase in Cash
Net Income
Cash Sales
Capital Expenditures
Dividends Paid
$45,000
95,000
40,000
65,000
15,000
12,000
What is Veronique's free cash flow for 2021?
A
$13,000
B
$18,000
$68,000
$33,000
Answer:
5,0967,358
Step-by-step explanation:
I need help I can’t understand this
9514 1404 393
Answer:
[tex]P_1=11.7\\P_2=15.21\\P_n=9\cdot1.3^n\\P_{10}\approx124.07[/tex]
Step-by-step explanation:
An exponential function can be written in the form ...
y = a·b^x
where x is the independent variable, b is the common ratio, and 'a' is the initial value (when x=0). The "common ratio" is the ratio of each term to the one before. For example, b = P₁/P₀.
Here, you are told the initial value (P₀) is a=9, and the common ratio is b=1.3. The independent variable is given as n, so your population formula is ...
P(n) = 9·1.3^n
__
You are asked for values when n = 1, 2, and 10. Since you know the common ratio, you can simply multiply P₀ by 1.3 to get P₁:
P₁ = 1.3·P₀ = 1.3·9 = 11.7
Similarly, ...
P₂ = 1.3·P₁ = 1.3·11.7 = 15.21
__
You could continue up to P₁₀, but it is easier to use a calculator to evaluate the exponential function.
P(10) = 9·1.3¹⁰ ≈ 124.07
Find m∠ABC in the picture. (it's not solving for x.)
Answer:
20°
Step-by-step explanation:
180-140=40
1/2 of 40=20
You put $500 in a savings account. The account earns $20 simple interest in 6 months. What is the annual interest rate? Write your answer as a percent
Answer:
8%
Step-by-step explanation:
For simple interest, we use the equation I = PRT, where I is the interest earned, P is the principal/amount invested, R is the rate as a decimal, not percentage, and T is the time in years.
For this problem, we have to use 0.5 for T, because 6 months is 1/2 a year.
20 = (500)(r)(0.5)
20 = 250r
r = 0.08 = 8%
A farmer recently sold a large plot of land. The sale decreased his total acreage by 6%. Let v be the original acreage. Find two equivalent expressions that will give the new acreage. Use the expressions to describe two ways to find the new acreage. Name two expressions that would give the new acreage. (A)0.06v
(B)6v
(C)v-6v
(D)0.94v-0.06v
(E)v-0.06v
(F)0.94v
Answer:
[tex]v - 0.06v[/tex] and [tex]0.94v[/tex]
Step-by-step explanation:
Given
[tex]Acreage = v[/tex]
[tex]Decrement = 6\%[/tex]
Required
Determine the new acreage
Because a reduction occur, the new acreage can be calculated using:
[tex]New = Acreage - Decrement * Avreage[/tex]
[tex]New = v - 6\% * v[/tex]
[tex]New = v - 0.06 * v[/tex]
[tex]New = v - 0.06v[/tex] ------ (1)
Evaluate the expression
[tex]New = 0.94v[/tex] ---- (2)
The Washington Monument in Washington, D.C. is surrounded by a circle of 50 American flags that are each 100 feet from the base of the monument. The distance from the base of a flag pole to the top of the monument is 564 feet. What is the angle of elevation from the base of a flag pole to the top of the monument?
Answer:
Step-by-step explanation:
cosx=100/564
x=arccos(100/564)
x=79.79 degrees (to the nearest hundredth of a degree)
The angle of elevation from the base of a flag pole to the top of the monument is to be considered as the 79.79 degrees.
Calculation of the angle of elevation;Since there is 100 feet from the base of the monument.
And, The distance from the base of a flag pole to the top of the monument is 564 feet
Now the angle should be like
cosx = 100/564
x = arc cos(100/564)
x=79.79 degrees
hence, The angle of elevation from the base of a flag pole to the top of the monument is to be considered as the 79.79 degrees.
Learn more about an angle here: https://brainly.com/question/124950