Step-by-step explanation:
-3/10+ -1/5
find the common denominator. on that case its 10
10 into 10 that's 1 so 3 remain 3 . then 5 into 10 its 2 so 1×2=2
-3/10 + -2/10
-3+-2
-3-2= -5
-5/10= -1/2
Ans is -1/2
-18/15 ×5/-4
you cross multiply. 5into 15 to get a denominator 3 then -4/2=-2 denominator. -18/2=-9. you multiply 3×-2=-6 then we are left with
-9/-6= -3/-2=1 and half
Ans is 1 1/2 (one and 1 half ).
3/8÷ -1/4
you spin -1/4 to -4/1 inorder to change the sign to a multiplication sign.
3/8 × -4/1 1
cross multiply to get -3/2
-3/2 = - 1 1/2
Ans : 1 1/2 ( one and one half )
pliz mark my answer branliest
someone please help me i don’t understand
Answer:
Answer B
Step-by-step explanation:
Write out f(x) and g(x) in a column; we will subtract g(x) from f(x):
f(x) = x^2 - 9 or f(x) = x^2 - 9
-g(x) = -(2 - x) or -g(x) = +x -2
---------------------------------
f(x) - g(x) = x^2 + x - 11 (Answer B)
the half life of carbon 14 is 5730 years. how much of a 50 gram sample would be left after 15000 years
Answer:
In this question (t½) of C-14 is 5730 years, which means that after 5730 years half of the sample would have decayed and half would be left as it is. After 5730 years ( first half life) 70 /2 = 35 mg decays and 35 g remains left. After another 5730 years ( two half lives or 11460 years) 35 /2 = 17.5mg decays and 17.5 g remains left . After another 5730 years ( three half lives or 17190 years) 17.5 /2 = 8.75mg decays and 8.75g remains left. after three half lives or 17190 years, 8.75 g of C-14 will be left.
Step-by-step explanation:
11 There are 136 people on a train.
34 of the people are children.
What percentage of the people on the train are adults?
Answer:
75%
Step-by-step explanation:
There are 136 people on a train
34 are children
Therefore the percentage of people that are adults can be calculated as follows
= 136-34
= 102
= 102/136 × 100
= 0.75 × 100
= 75%
Hence 75% are adults
Three uniform shirts sell for $34.50. How much will 5 uniform shirts cost?
Answer:
57.5
Step-by-step explanation:
Recognize our numbers
3,5,34.50
Three uniform shirts sell for 34.50
34.50/3
=11.5
How much will five cost?
5x11.5
=57.5
Hope this helps!
Answer:
55.25
Step-by-step explanation:
1. First we need to work out the price of ONE shirt. To do that we divide the total price of 3 shirts by 3.
34.50 / 3 = 11.05
2. Now we know that the price of one shirt is $11.05p we can multiply that by 5 to get the price of 5 shirts.
11.05 * 5 = 55.25
= $55.25p
Artificial grass sells for $10.98 per square yard final cost to buy and install 69.2 square yards if the seller charges $5.15 per square yard for labor round to the nearest cent
Answer:
$1,116.19.
Step-by-step explanation:
Given that artificial grass sells for $ 10.98 per square yard, to determine the final cost to buy and install 69.2 square yards if the seller charges $ 5.15 per square yard for labor, round to the nearest cent, the following calculation must be performed:
69.2 x (10.98 + 5.15) = X
69.2 x 16.13 = X
1,116,196 = X
Thus, the cost to purchase and install 69.2 square yards of artificial grass is $ 1,116.19.
what is 15% of 80????
Answer:
80:100x15= 0,8 x15=12
Pls mark as brainliest
Answer:
I think it is 12 , 15 % of 80 should be 12
plz mark my aa brainliest also
What is X equal to if 1X+30=6X+20?
Answer:
x=2
Step-by-step explanation:
1*x+30=6x+20
Multiply 1*x=x
x+30=6x+20
Subtract 30 from both sides:
x+30-30=6x+20-30
Simplify:
x=6x-10
Subtract 6x from both sides
x-6x=6x-10-6x
Simplify:
-5x=-10
Divide both sides by -5
-5x/5=-10/-5
Answer:x=2
Miguel can drive 4 times as fast as Raul can ride his bicycle. If it takes Raul 3 hours longer than Miguel to travel 68 miles, how fast (in mph) can Raul ride his bicycle? Round your answer to two decimal places, if needed.
Answer:
17 mphStep-by-step explanation:
Miguel's speed = m, Raul's speed = rGivenm = 4rDistance = 68 milesTime difference = 3 hoursSolutiontime = distance/speedSubstitute values and solve for r the equation of the time difference:
68/m + 3 = 68/r68/4r + 3 = 68/r17/r + 3 = 68/r17 + 3r = 683r = 68 - 173r = 51r = 17Raul's speed is 17 mph
Answer:
[tex] \huge \boxed{ \boxed{ \red{ \tt17 \: mph}}}[/tex]
Step-by-step explanation:
to understand thisyou need to know about:equationequation word problemsPEMDASgiven:Miguel can drive 4 times as fast as Raul can ride his bicycle. If it takes Raul 3 hours longer than Miguel to travel 68 miles, how fast (in mph) can Raul ride his bicycletips and formulas:t=d/sto findhow fast can Raul ride his bicyclelet's solve:let's the speed of Raul be x
likewise
Miguel can drive 4 times as fast as Raul can ride his bicycle
therefore
4x
according to the question
[tex] \sf \frac{68}{4x}+3=\frac{68}{x}[/tex]
[tex] \implies \sf \frac{68 + 12x}{4x} = \frac{68}{x} [/tex]
[tex] \sf factor \: out \: 4 \: and \: reduce \: it : \\ \sf \implies \frac{4(17 + 3x)}{4x} = \frac{68}{x} \\ \\ \implies\sf \frac{17 + 3x}{x} = \frac{68}{x}[/tex]
[tex] \sf multipy \: both \: sides \: by \: x : \\ \sf \implies (\frac{17 +3 x}{x} )x = (\frac{68}{x} )x \\ \implies \sf 17 + 3x = 68[/tex]
[tex] \sf cancel \: 17 \: from \: both \: sides : \\ \implies \sf 17 - 17 + 3x = 68 - 17 \\ \implies \sf 3x = 51[/tex]
[tex] \sf divide \: both \: side s \: by \: 3 : \\ \sf \implies \frac{3x}{3} = \frac{51}{3} \\ \therefore x = 17[/tex]
Sheila simplified an expression using the following steps. Which property justifies Step 3? Step 1: 5x + 4(3 + 2x) Step 2: 5x + 12 + 8x Step 3: 5x + 8x + 12 Step 4: 13x + 12 O A. Identity Property O B. Associative Property O C. Distributive Property D. Commutative Property
Answer:
distributive property
Step-by-step explanation:
have a great day
Answer:
: 5x + 4(3 + 2x)
: 5x + 12 + 8x
: 5x + 8x + 12
: 13x + 12 Distributive Property
Perform the indicated operation. (2u2 - 7) ÷ (u + 3)
Answer:
2u+3-7/u
Step-by-step explanation:
factor the numerator and denominator and cancel the common favtors
5у2 2is a power + бу - 4
Answer:
Its 5000
Step-by-step explanation 4883-3455=5000
The flag football league eventually had 72 kids sign up for the spring season after putting six teams together from the original amount of sign ups they took took it off of everything to make the final rosters how many kids were on the original rosters before removing some players
draw a tape diagram and write an equation to match the situation then solve the equation and put your answer in the context of the situation
Answer:
each team has 12
Step-by-step explanation:
Frank is building 2 raised gardens. He needs 3 cubic yards of soil to fill the first garden and 2 1/2 times that amount to fill the second one. How much soil does Frank need to fill the second garden?
Answer:
7.5 cubic yards
Step-by-step explanation:
3* 5/2= 15/2= 7.5 cubic yards
if my answer helps please mark as brainliest.
6. If Misty practices for eight hours a day, six days a week, how many total
hours does Misty practice each week? How many hours in a year?
Answer:
48 hours a week and 576 hours a year
Step-by-step explanation:
Which choice correctly expresses the number below in scientific notation?
0.000607
A. 6.07 : 10-5
B. 6.07 · 10-3
C. 6.07. 10-4
D. 607 • 10-4
E. 60.7.10-5
F. 607. 10-6
Answer:
The answer is C. 6.07 × 10^-4
hiii , does anyone know with work? thank you
Answer:
3√41
Step-by-step explanation:
The diagonal can be gotten using the pythagoras theorem
d² = l²+w²
d² = 12²+15²
d² = 144 + 225
d² = 369
d = √9*41
d = 3√41
Hence the diagonal is 3√41
Describe ways you can determine something is either linear or exponential. Be specific PLZ
also plz hurry i need help quick
Calculate the perimeter of this shape 12cm 18cm
Answer:
30
Step-by-step explanation:
perimeter = side 1+side 2
12+18=30
Answer:
60 cm
Step-by-step explanation:
= (12 x 2) + (18 x 2)
= 24 + 36
= 60
In ΔDEF, the measure of ∠F=90°, the measure of ∠E=41°, and FD = 79 feet. Find the length of DE to the nearest tenth of a foot.
Answer:
120.4ft
Step-by-step explanation:
Find the diagram in the attachment.
The triangle shown is a right angled triangle with the side DE as the hypotenuse, EF is adjacent side while DF is the opposite side.
To get DE, we will use the SOH CAH TOA trigonometry identity
Using CAH which is defined as:
Cos(theta) = Adjacent/Hypotenuse
Cos 79°= 23/Hypotenuse
Hypotenuse = 23/cos79°
Hypotenuse = 23/0.191
Hypotenuse = 120.4feet
DE = 120.4feet (to nearest tenth)
Simplify completely''''
Answer:
[tex]\displaystyle \frac{2(x + 3)}{5x - 2}[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightAlgebra I
Terms/CoefficientsFactoringStep-by-step explanation:
Step 1: Define
[tex]\displaystyle \frac{2x^2 + 16x + 30}{5x^2 + 13x - 6}[/tex]
Step 2: Simplify
[Fraction] Factor numerator: [tex]\displaystyle \frac{2(x + 3)(x + 5)}{5x^2 + 13x - 6}[/tex][Fraction] Factor denominator: [tex]\displaystyle \frac{2(x + 3)(x + 5)}{(x + 3)(5x - 2)}[/tex][Fraction] Divide: [tex]\displaystyle \frac{2(x + 3)}{5x - 2}[/tex]Please help thank u i hope u help
The cost to replace a water pump in a car was $816. This included $381 for the water pump and $87 per hour for labor. How many hours of labor were required to replace the water pump?
This relationship is a function.
2
4
5
6
5
6
8
13
True
O False
Which is one reason why this expression is equal to 0?
[tex]8.29 \times \frac{ - 5.62 + 5.62}{5.62} [/tex]
Answer:
0
Step-by-step explanation:
The given expression is :
[tex]8.29 \times \frac{ - 5.62 + 5.62}{5.62}[/tex]
We can solve the expression as follows :
[tex]\frac{ - 5.62 + 5.62}{5.62}=\dfrac{0}{5.62}[/tex] (As -5.62+5.62 equals to 0)
Any number multipled to 0 gives 0.
Hence, the value of the given expression is equal to 0.
A ladder is leaning against a building so that the distance from the ground to the top of the ladder is one foot less than the length of the ladder. Find the length of the ladder if the distance from the bottom of the ladder to the building is 5 feet.
A right triangle with the hypotenuse measuring x and one leg measuring x minus 1.
(1 point)
11 feet
14 feet
12 feet
13 feet
Answer:
Length of ladder (hypotenuse) = 13 ft
Step-by-step explanation:
Given:
Length of base (base) = 5 ft
Length of ladder (hypotenuse) = a
Distance between ground and ladder top (perpendicular) = a - 1
Find:
Length of ladder
Computation:
a² = 5² + (a-1)²
a² = 25 + a² - 2a + 1
2a = 26
Length of ladder (hypotenuse) = 13 ft
1/3 plus 1/4 so what is the answer to this question
Answer: 7/12
Step-by-step explanation:
1/3 + 1/4
1/3 = 4/4 * 1/3 = 4/12
1/4 = 3/3 * 1/4 = 3/12
4/12 + 3/12 = 7/12
Graph 5x + 3y = 15.
y
Graph is on the picture.
hope ot helps.
how many hours in 1weak
Answer:
168 hours
Step-by-step explanation:
what do you know to be true about the values of a and b
Answer:
a
Step-by-step explanation:
all angles in a triangle is equal to 180 so
60+50=110 so p =70
80+30=110 so q =70
p=q
Answer:
p=q
Step-by-step explanation:
please answer giving BRAINLIEST
Answer:
x=7
Step-by-step explanation:
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Have
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