which of the following is a counterexample of this statement?
If an angle is acute, then it measures 80°.
A. a 100° angle
B. a 90° angle
C. a 80° angle
D. a 70° angle
Answers
Answer:
a 70° angle
Step-by-step explanation:
an acute angle measure between 0° and 90° so a counterexample for the statement is the 70° angle which is also an acute angle that doesn't measure 80°
brainliest is appreciated
Related Questions
Sandra decided to bake blackberry pies to sell at the county fair. She had $180 in her savings
account. She spent $130 of her savings buying all the ingredients. At the fair, she sold 25
pies and charged $9 per pie. She took the money she earned from the fair and added it to
her savings account. How much money is in Sandra's savings account now?
Answers
Answer:
275
Step-by-step explanation:
180-130=50
25*9=225
225+50 = 275
solve this -8+0.75z=12-0.25z
Answers
Answer:
z = 20Step-by-step explanation:
-8+0.75z=12-0.25zTranspose '-8' from LHS to RHS
So,
[tex] 0.75z = 12 + 8 - 0.25z[/tex]
Then transpose '0.25z' from RHS to LHS
So,
[tex]0.75z + 0.25z = 20 \\ 1z = 20[/tex]
So therfore z = 20
Hooe this helps and pls mark me brainliest!
2. Find the domain of the function (f/g)(x) where f (x)= x^2 – 9 and g(x)= x^2 - 4x+3
A (-infinity, infinity)
B (-infinity, 1) (1, infinity)
C (infinity, 1) (1,3) (3, infinity)
D (-infinty, -3) (-3,-1)(-1, infinity)
Answers
Answer:
I think you mean C.
Step-by-step explanation:
f(x) / g(x) = (x + 3)(x - 3)
==========
(x - 3)(x - 1)
f(x)/g(x) = (x+3) / (x - 1)
- ∞ < 1 U 1 < 3 U 3 < ∞
If the volume of a cube is 27 m^3, what is the surface area of the cube, in square meters
Answers
Step-by-step explanation:
25847 /5839(3910)466410(:75920)2
Martin spent $300 from his savings account on a new bike. He also deposited $300 in his savings account that he earned from selling his used textbooks. Which integer represents the change in Martin's savings? A) $100 B $0
C. -100$ D. -$200
Answers
Answer:
B
Step-by-step explanation:
a money account works in the same way as real things we can touch.
so, when I have 300 apples at a place (e.g. a grocery store), then I take away 300 apples, and then put again 300 apples there - how many apples will be there at that moment ?
we had 300 and took away 300.
300 - 300 = 0
at that moment we have 0 apples.
but then we put again 300 apples there.
0 + 300 = 300
so, we end up with 300 apples. the same number we started with.
and the same way for the savings account.
he takes out $300.
that means he has now $300 less on his account.
and then he adds $300.
so, he added exactly the same amount as he took out earlier, which means nothing else than that he undid his earlier action regarding his bank account.
so, his balance is now exactly the same as before he did the first transaction.
therefore the change is exactly : $0
K is between J and M. L is
between K and M. M is
between K and N. If JN = 14, KM = 4, and JK = KL = LM, what is NL?
(do step-by-step fully pls)
Answers
Step-by-step explanation:
given,
K is between J and M, L is between K and M, M is between K and N. JN = 14, KM=4 and JK= KL= LM
NL=?
according to the question,
J-------K-------L------M--------N
We know,
KM= 4
KL+LM=4
KL+KL=4 (LM=KM)
2KL=4
KL=2
SO,
JK=KL=2 and LM=KL=2
we have ,
JN=14
JK+KM+MN= 14
2+4+MN=14
MN=8
Now,
NL=LM+MN= 2+8= 10
Find three consecutive even integers such that five times the second is six more than twice the sum
of the first and third integers
Answers
Answer:
The first number = 4The second number = 6The third number = 8Step-by-step explanation:
Let all unknown numbers be represented by the variable x.So;x = first number
x + 2 = second number
x + 4 = third number
placing in a form as demanded by the question.5(x + 2) = 6 + 2x + 2 ( x + 4)
5x + 10 = 6 + 2x + 2x +8
5x - 4x = 14 - 10
x = 4
Therefore;The first number (x) = 4
The second number ( x + 2) = 4 + 2 = 6
The third number (x + 4) = 4 + 4 = 8
Answer:
2x + 2x +2 + 2x +4 = 6x +6 =Sum
5 * (2x +2) = 2 * (2x + 2x +4) +6
10x + 10 = 8x + 8 + 6
2x = 4
x = 2
So the numbers are:
2x or 4
2 x + 2 = 6
2x + 4 = 8
Double-Check
5 * 2nd integer = 30
2 * (1st + 3rd integers) = 24
30 is 6 more than 24
Success!!!
Step-by-step explanation:
-5r - 3r = ?
Can someone explain how to do solve this?
Answers
Answer:
-8r
Step-by-step explanation:
-5r - 3r
Combine like terms
Factor out r
r( -5-3)
-8r
Answer:
like bases combine under add/subtract
-5 minus 3 is -8
-8r would be the solution
Step-by-step explanation:
In cashing a check for $220, Christina asked for the whole amount in $10 and $20 bills. She received a total of 13 bills, four of them being $10 bills.
O True
O False
Answers
Hi
if she recieived 13 bills and 4 are 10 $? then we have 13-4= 9 20$ bills
so 4x10 +9x20 = 40+180 = 220
So yes it's true
Plz answer the question
Answers
Answer:
it's a binomial ............
Math For test HELPPPP plz due in 45 mins
Answers
PLZ ANSWER ASAP I WILL GIVE CORRECT ANSWER BRAINLIEST
Which expression shows the distance you would travel from the gym to your science
class in this hallway?
thank you
Answers
Answer:
Option 1
Step-by-step explanation:
The number line indicates that you traveled 12 units to get from the gym to your science class. Option 1 is the only expression that gets you 12, because it's the absolute value of -4, which is 4, + 8.
help!!! this is due tomorrow!!!!!
Answers
I think…………………………………………..
A bag contains yellow-blue-, orange-, green-, red- and black-colored crayons The table below shows the results of selecting one crayon from the bag, recording the color and then replacing the crayon. What is the experimental probability of selecting a crayon that is either orange or red?
Answers
In a rotation, pairs of corresponding points are on parallel lines?
Answers
Step-by-step explanation:
Corresponding angles are congruent if the two lines are parallel. All angles that have the same position with regards to the parallel lines and the transversal are corresponding pairs.
PLS HELP WILL MAKE FIRST RIGHT ANSWER BRAINLIEST
Answers
Answer:
OPTION A:0.85M+2.50.
Step-by-step explanation:
SEE IMAGE FOR SOLUTION
4y + 3x + 2y + 9x + 4
Anyone down to help with this and other ones ?
Answers
Answer:
6y+12x+4
Step-by-step explanation:
4y + 3x + 2y + 9x + 4
Combine like terms
4y+2y +3x+9x +4
6y +12x +4
The figure below shows a rope that circles the Earth. The radius of the Earth is 6371 kilometers. Assuming the rope makes a perfect circle, what is the length of this rope? Give your answer in terms of pi. kilometers
Answers
Answer:
12742π kilometers
Step-by-step explanation:
Circumference = 2πr
Circumference = 2(r)π
r = 6371
Circumference = 12742π
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Answer:
12742
Step-by-step explanation: Khan Academy
someone help me plz:
Andrew has an annual income of $25,000. He decides to take classes online and at night so that he can continue to work. After 3 years, he gets his degree and immediately starts earning $35,000 per year. If it takes Andrew 6 years to recover his investment for his education, how much did it cost him? Show your work.
Answers
Rate of change=35000-25000=10000
Time=6years
Total cost
[tex]\\ \sf\longmapsto 10000(6)=\$60000[/tex]
Pls help I’m really confused
A store pays 5%
commission on the first
$500 in sales and 7% on
sales over $500. Find
the commission on a
$950 sale,
Answers
Answer:
114$
Step-by-step explanation:
if A = { 0 }, n ( A ) = ?
Pls answer my question!
Answers
Answer:
0Step-by-step explanation:
A = { 0 }, n ( A ) = 0[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
Which shape fits the description below?
A three-sided figure with angle measures of 60°, 60°, and 40°.
X.
Y.
Z.
OA. Y
OB. Z
OC. X
OD. The shape is nonexistent.
Answers
Answer:
OD for a triangle to exist it must equal 180 degrees as a final and this one only equals 160
Answer:
D. The shape is nonexistent.
Step-by-step explanation:
A triangle's angles must add up to 180 degrees.
60+60+40 is 160.
160[tex]\neq[/tex]180
5(-7k+4d) Use k=-7 and d=4
Simplified is??
Answers
Answer:
325
Step-by-step explanation:
k = -7
d=4
5(-7k + 4d)
5(-7(-7) + 4(4))
5(49 + 16)
325
please give brainliest I need it to level up
Use the number line below, where RS = 5y +5, ST = 3y +6, and RT = 12y - 21. a. What is the value of y? b. Find RS, ST, and RT. a. What is the value of y? y = (Type an integer or a decimal.)
Answers
Answer: 89
Step-by-step explanation:
show your work
Evaluate.
(-1)3 =
Hell no links!!!
Answers
Answer:
-3
Step-by-step explanation:
(-1)3 = -3
Answer:
-3
Step-by-step explanation:
-1 × 3 = -3
also when you have a negative and a positive it means that the answer is negative.
Watch help video
Determine if v 49 is rational or irrational and give a reason for your answer.
The number 49 is rational
because
Answers
Step-by-step explanation:
If a number is rational, we can represent it as a fraction.
[tex] \frac{a}{b} [/tex]
Where a and b are intergers.
First, we know that
[tex] \sqrt{49} = 7[/tex]
We can represent 7 as
[tex] \frac{7}{1} ..... \frac{14}{2} .... \frac{21}{3} ..... \frac{n}{y} = 7[/tex]
Where n and y are two numbers that when divided equal 7.
So
[tex] \sqrt{49} [/tex]
is a rational number
Is 9.5 an irrational number
Answers
Answer:
yes it is.....................
Step-by-step explanation:
9.5 = 19/2
So it is a rational number (and so is not irrational)
A53 degrees
B143degrees
C37degrees
D90degrees
????????????
Answers
Answer:
143 = EFD
Step-by-step explanation:
The two angles form a straight line
AFD = 180
AFD = AFE + EFD
180 = 37+ EFD
180 -37 = EFD
143 = EFD
guys solve everything or only 2nd one
Answers
Answer:
Step-by-step explanation:
What is a expression equivalent to 9-(-12)
Answers
9 + 12
Step-by-step explanation:
Two negative signs together makes addition!
Hope this helps!
- doomdabomb