Answer:
x=1 y=14
multiply x-y=-13 by 3 so the x would cancel out. solve for y
then plug in y to one of the equations to get x
Answer: the answer is x= -2 , y=11
Step-by-step explanation:
First
1: we have to find the answer for x in x-y= -13
2: add y on both sides of the equation
3: we will get x= -13+y
Second
1: Substitute x in 3x-y= -17 with x=-13+y
2: then you will get 3(-13+y)-y= -17
3: multiply 3 with -13 and y
4: you will get -39+3y-y =-17
5: add 3y and -y
6: you will get -39+2y= -17
7: add 39 on both sides of the equation
8: you will get 2y=22
9: divide 2 on both sides
10: you will get y= 11
Third
1: plug 11 for y in x= -13+y
2: then you will get x= -13+11
3: you will x= -2
So x= -2 and y= 11
Jason solved the percent problem below and got
X=133%. Did he do it correctly? Explain your reasoning.
Answer:
No is incorrect 4/27 is right
Step-by-step explanation:
In a lab experiment, the decay of a radioactive isotope is being observed. At the beginning of the first day of the experiment the mass of the substance was 1300 grams and mass was decreasing by 6% per day. Determine the mass of the radioactive sample at the beginning of the 8th day of the experiment. Round to the nearest tenth (if necessary).
The mass of the radioactive sample at the beginning of the 8th day of the experiment a_13=310.7.
In a lab experiment, the decay of a radioactive isotope is being observed.
At the beginning of the first day of the experiment, the mass of the substance was 1300 grams and the mass decreased by 6% per day.
What is the formula of the nth term?
[tex]a_n=a_1r^{n-1}[/tex]
Use the given value in the formula so we get,
[tex]a_{13}=1100(0.9)^{13-1}[/tex]
Simplify the given term
[tex]a_{13}=310.7[/tex]
Therefore, The mass of the radioactive sample at the beginning of the 8th day of the experiment a_13=310.7.
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Answer:
389
Step-by-step explanation:
The lenght of a turtles shell z, in millimeters, is related to the turtles age in years a , as described by the equation below.
s=55a+37
Which statements about the turtle are true?
Select 3
Answer:
B, C , F
Step-by-step explanation:
The age multiplied 55, so the shell grows at rate of 55mm per year
in fact if the age is 2 we have (55 x 2) = 55 + 55
if 3 = (55 x 3) = 55 + 55 + 55
and so on
When the turtle is hatched the shell is 37 mm in lenght.
In fact, if we substitute 0 to a, we have
s = (55 x 0) + 37
s = 37
when the turtle is 1 year old, the shell is 92 mm in length.
in fact if we substitu a with 1, we have
s = (55 x 1) + 37
s = 55 + 37
s = 92
what is the mean of the data set below 2, 3, 5, 6, 6, 10, 15, 15,
Please help me? I am confused.
Answer:
-5
Step-by-step explanation:
You are trying to find the cube root of a number. Because the number is being multiplied by itself 3 times over, only a negative number could be a cube root of another negative number
If the diameter is 26 inches, what is the radius
Answer:
13 inches
Step-by-step explanation:
In any circle, the radius is always half of the diameter.
So, the diameter can be found by multiplying the radius by 2, and the radius can be found by dividing the diameter by 2.
Since the diameter is 26 inches, we can divide this by 2 to get the radius
26/2
= 13
The radius is 13 inches
Answer:
[tex] \bf \huge13[/tex]
Step-by-step explanation:
Given that : the diameter is 26 inches.to find :what is radius .formulas used :radius = diameter / 2explanation :we know that,
finding the radius
⟼ diameter = 26 inches
⟼ radius = diameter / 2
⟼ radius = 26 / 2 inches
⟼ radius = 13 / 1 inches
⟼ radius = 13 inches.
∴ radius is 13 inches .
the diagram shows a track composed of a rectangle with a semicircle on each end. the area of the rectangle is 4,000 square meters. what is the perimeter of the track?
Answer:14400
160
=
90
Step-by-step explanation: 90
⋅
π
=
90
π
→
If you are using an approximation such as 3.14 for
π
, multiply that by 90
Add
160
⋅
2
to the circumference since the lengths of the rectangle are also part of the perimeter.
160
⋅
2
=
320
90
π
+
320
Anyone know the correct answer for the measure of angle B?
Answer:
∠B = 64.62°
Step-by-step explanation:
cos B = 3/7 = 0.4286
∠B = 64.62°
A photo of an ant in a science book is increased to 655% as large as the actual size. If the ant is 14 millimeters, what is the size of the ant in the photo?
Answer: [tex]91.7\ mm[/tex]
Step-by-step explanation:
Given
The size of the ant is enlarged by [tex]655\%[/tex]
The actual size of the ant is [tex]14\ mm[/tex]
Enlarged size is
[tex]\Rightarrow 14\times \dfrac{655}{100}\\\\\Rightarrow 91.7\ mm[/tex]
There are 5 people at a party. They decide to share 3 ice cream sandwiches equally.
Which model shows how much of the ice cream sandwiches each person will get?
C.
D
Answer:
your answer will be D. I think :)
Answer: d
i have the test
On her 21st birthday, Sydney deposited $400 in a new bank account that earns 3.7% interest compounded continuously. If there are no other deposits or withdrawals, how much interest will she have earned by her 60th birthday
Answer:
$1,649.80
Step-by-step explanation:
Sydney will have earned $1293.35 in interest by her 60th birthday.
How to find interest?To solve this problem, we need to use the formula for continuously compounded interest:
A = P [tex]e^{rt}[/tex]
Where:
A is the final amount of money in the account (including principal and interest)
P is the initial principal (in this case, $400)
r is the interest rate (in this case, 3.7% per year)
t is the number of years the money is invested (in this case, 39 years)
e is the mathematical constant approximately equal to 2.718
Plugging in the values from the problem, we get:
A = $400[tex]e^{0.037 \times 39}[/tex]
Calculating this, we find that A = $400[tex]e^{1.443}[/tex] = $1693.35
Therefore, he will have earned $1693.35 - $400 = $1293.35 in interest by her 60th birthday.
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Arthur went to dinner. The meal cost $157 and
he wants to leave an 18% tip. How much money
should he leave for the tip?
Arthur should leave a $28.26 tip
542 L =
kL
Brainliest and points
Answer:
0.542
Step-by-step explanation:
divide the liter by 1000 and get your answer! have a great day
542 liters is approximately equal to 0.542.
Given that a quantity, 542 L we need to convert it into kL,
To convert liters (L) to kiloliters (kL), you need to divide the given value in liters by 1,000 since there are 1,000 liters in 1 kiloliter.
In this case, to convert 542 L to kL, you can use the following formula:
kL = L / 1000
Plugging in the given value:
kL = 542 L / 1000
Dividing 542 by 1000, you get:
kL ≈ 0.542 kL
Therefore, 542 liters is approximately equal to 0.542.
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A rectangular flower garden in Samantha’s backyard has 100 feet around its edge. The width of the garden is 20 feet. What is the length
Answer:
bces
Step-by-step explanation:
length:30ft
Step-by-step explanation:
if the perimeter is 100 than 20+20+x+x=100.
20+20=40
100-40=60
since there are two length sides, divide 60 by two and then you have your answer.
20+20+30+30=100
hope this helped
Simplify cot2q + 1.
a.
csc2 q
c.
cot2 q
b.
0
d.
cos2 q
Please select the best answer from the choices provided
A
B
C
D
Answer:
It's D
Step-by-step explanation:
it showed the correct answer on Edge
What is the solution to the inequality? x/2 > 7
Answer: x > 14
m a th way can help with any similar questions like this !!
the circumference of a circle is about 48.042 yards. the circle's diameter is ___ yards.
use 3.14 for pi.
Step-by-step explanation:
Given
Circumference of circle = 48.042 yards
diameter (d) = ?
we know
Circumference = πd
or, 48.042 = 3.14 * d
or, d = 48.042 / 3.14
Therefore d = 15.3 yards
The circle's diameter is 15.3 yards.
Hope it will help :)❤
pls pls pls, I beg you to answer this question only if you know the correct answer please please please I beg you
Answer:
4) The error made was that you were supposed to multiply 5 and 2. The answer is supposed to be 43.
5) B) 18
6) 18
7) B) 20
8) B) 28
Step-by-step explanation:
4)
36 - 3 + 5 · 2
36 - 3 + 10
43
5)
3(7) - 3 = 18
6)
3(2) + 2(4) + 4 =
6 + 8 + 4 =
18
7)
24 ÷ 3 + 12 = 8 + 12 = 20
8)
5(6) - 2 = 30 - 2 = 28
I NEED HELP FAST!!!! WILL GIVE BRAINLIEST.
Answer:
Step-by-step explanation:
Ok what’s the problem
Can anyone help me with this question?
Answer:
x= -1
Step-by-step explanation:
the answer is x= -1
hope it helps
Remove the brackets using the distributive law for the following: -9(a + 4)
Answer:
-9a - 36
Step-by-step explanation:
Step-by-step explanation:
I m not sure but I think this is the answer
HELP PLZ
"Is triangle ABC a right triangle? Use measurements from all sides of the triangle to argue yes or no"
Answer:
no 12,5,12
Step-by-step explanation:
3 Simplity the following rotic's = 4:16
Answer:
1:4
Step-by-step explanation:
simply divided by 4 :)
If (5^n)^3 = 5^12 then n= ?
6
Answer: n=4
Step-by-step explanation:
Uh I did some trial and error and it came up with the right answer
what expression is equivalent to 3(7x-z+5)
plz help 50 points will give brainliest to first correct answer
Answer:
Step-by-step explanation:
BDC=95
Answer:
[tex] m\angle BDC = 95\degree [/tex]
Step-by-step explanation:
[tex] In\: \triangle ACD\: \&\:\triangle BDC[/tex]
[tex] m\angle A = m\angle B[/tex] (given)
[tex]\because m\angle A = 50\degree [/tex]
[tex]\therefore m\angle B = 50\degree [/tex]
[tex] m\angle ADC = m\angle BCD[/tex] (given)
[tex]\because m\angle ADC = 35\degree [/tex]
[tex]\therefore m\angle BCD= 35\degree [/tex]
[tex] In\: \triangle BDC[/tex]
[tex] m\angle BDC = 180\degree - (m\angle B+m\angle BCD) [/tex]
(By angle sum postulate of a triangle)
[tex] m\angle BDC = 180\degree - (50\degree +35\degree ) [/tex]
[tex] m\angle BDC = 180\degree - (50\degree +35\degree ) [/tex]
[tex] m\angle BDC = 180\degree - 85\degree [/tex]
[tex] m\angle BDC = 95\degree [/tex]
2. Tim makes a tissue box. The area of the base is 45 square inches. The height of the box is 4 inches. What is the volume of the tissue box?
The volume of the tissue box is 180 cubic inches.
What is the volume?Volume is the measure of the capacity that an object holds.
Formula to find the volume of the object is Volume = Area of a base × Height.
Given that, the area of the base is 45 square inches.
The height of the box is 4 inches.
Now, volume = 45×4
= 180 cubic inches
Therefore, the volume of the tissue box is 180 cubic inches.
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Is (4, 3) a solution to the inequality 10x + 2y > 3?
Answer:
Yes
Step-by-step explanation:
10x + 2y > 3
Substitute the point into the inequality
10(4)+2(3) > 3
40+6>3
46>3
This is a true statement so the point is a solution
log(x+4)=logX + log4
Answer:
log
(
x
+
4
)
=
log
(
x
)
+
log
(
4
)
=
log
(
4
x
)
, so
x
+
4
=
4
x
, hence
x
=
4
3
Step-by-step explanation:
Simplify:
5 1/2 - 2 1/4
1 3/4 + 1 1/2