Joshua took a math contest with 25 questions. Each correct answer earned 6 points while each incorrect answer deducted 4 points. Joshua answered every question and earned 100 points. How many questions did Joshua answer correctly?
Answer:
20
Step-by-step explanation:
20*6=120
4*5=20
120-20=100
9. One number is 7 more than twice another number. The sum of the numbers is 22. What is one of the numbers?
O-5
O 10
07
O 17
Step-by-step explanation:
Hey there!
According to the question,
Let the unknown number be x (smaller) another number be y (greater) respectively.
1st condition: One number is 7 more than twice of another number.
(i.e y = 2x+7)....... (i)
2nd condition: The sum is 22.
(i.e X+y= 22)……(ii)
From equation (ii).
x+ y= 22
x= 22-y
Putting the value of X in eqaution (I)
y = 2(22-y)+ 7
y = 44 - 2y +7
3y = 44+7
y = 51/3
Therefore, y= 17.
Now, Putting the value of y in eqaution (ii)
X = 22-y
x = 22-17
Therefore, x= 5.
Therefore, one number is 17. (Option D).
Hope it helps....
Help? I dont get it
Answer:
its 6%
Step-by-step explanation:
0.60 and 0.6 is the same thing. 6% is bigger than the other two.
Answer:I believe that the middle answer (6%) should be circled.
Step-by-step explanation: Six percent or 0.06 in decimal form is different than 0.60, which is the equivalent of the other two answers.
please help me i need this really bad
Answer:
It's 3!
Step-by-step explanation:
3 books times 6 dollars each = 18 dollars.
21 minus 18 dollars = 3.
2x + 5y = 1
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What is the area of the circle? Use 3. 14 as an estimate for pi.
A. 21.98 m2
B. 43.96 m2
C. 153.86 m2
D. 483.12 m2
E. 615.44 m2
153.86m^2
Step-by-step explanation:
diameter=14
radius=14/2=7
area of circle=pi×r^2
"" =3.14×7^2
=3.14×7×7
=153.86m^2
How is 7 (x + 2) different? Brainstorm how this problem could be simplified
Help ples!!!!
answer:
distribute
step-by-step explanation:
7(x+2)
7(x)=7x
7(2)= 14
7x+14
2.
3.
Mal slept for x hours, and Kiran slept for 1/10
less than that
Kiran practiced the piano for x hours, and Mal
practiced for 2/5 less than that.
Mai drank x oz of juice and Kiran drank 4/3
more than that
Kiran spent x dollars and Mal spent 1/4 less
than that.
Mai ate x grams of almonds and Kiran ate 1.5
times more than that.
Kiran collected x pounds of recycling and Mai
collected 3/10 less than that.
Mai walked x kilometers and Kiran walked 3/8
more than that
Kiran completed x puzzles and Mal completed
3/5 more than that.
a. y = 2.5.2
by=1.3752
cy=0.92
d.y=0.72
e. y=0.62
4
5.
6.
7
f. y=.752
8. y= 2.332
hy=1.62
8.
Yeah
Answer:
The answer is below
Step-by-step explanation:
a) Let y represent the amount of time kiran slept, hence:
y = x - (1/10)x = x - 0.1x
y = 0.9x
b) Let y represent the amount of time Mia practice, hence:
y = x - (2/5)x = x - 0.4x
y = 0.6x
c) Let y represent the amount of drink kiran drank, hence:
y = x + (4/3)x = 7x / 3
y = 7x/3
d) Let y represent the money Mai spent, hence:
y = x - (1/4)x = x - 0.25x
y = 0.75x
e) Let y represent the amount of almond kiran ate, hence:
y = x + 1.5x = 2.5x
f) Let y represent the recycling Mai collected, hence:
y = x - (3/10)x = x - 0.3x
y = 0.7x
g) Let y represent the amount of km kiran walked, hence:
y = x + (3/8)x
y = (11/8)x
h) Let y represent the amount of puzzles mai completed, hence:
y = x + (3/5)x = x + 0.6x
y = 1.6x
Philip is saving money to buy a new computer. He saves the same amount of money each
week.
• After 2 weeks of saving, Philip still needs $520 to buy the computer.
• After 6 weeks of saving, Philip still needs $300 to buy the computer.
How much does the computer cost?
Answer: 1020
Step-by-step explanation:
300 + 200 = 500 + 520 = 1020
Help please 1. Solve the system of equations using substitution. Show your work in the workspace provided below.
y= 6x +1
y=-2 +6x
2. Solve the system of equations using substitution. Show your work in the workspace provided below
2x-3y=-1
Y=x-1
Answer:
x=4 y=3
its the answer for both
hope that helps
√5× √5×√2×√2
please answer this
Answer:
10 .
how i got this calculator
Answer:
√5×√5×√2×√2
=5×2
=10
Step-by-step explanation:
hope it helps
FOR 47 POINTS PLEASE HELP
QUESTION 1
If RS is 2x+15, and VW is 3x+5, and UT is 6x-37. What is RS?
QUESTION 2
Angle J is (7x+2) Angle L is (25x-14)
What is (x)
Answer:
UV=25 units
Step-by-step explanation:
we know that
UW=UV+VW -----> by addition segment postulate
substitute the given values
4x+10=5x+5
solve for x
5x-4x=10-5
x=5
Find the value of UV
UV=5x
substitute the value of x
UV=5(5)=25 units
plz help im bad i’ll give brainlest
Answer:
10=x
Step-by-step explanation:
3= 2x-17
+17=2x
20=2x
10=x
The cost of beauty products was raised 4%. What is the cost of something that was previously $30?
please help me
Answer:
$31.2
Step-by-step explanation:
multiply 30 by 4%
30 × 0.04=1.2
then add 1.2 to 30 to get
31.2
If x is the number of bags of M&Ms bought at $3 per bag, and y is the number of bags of Kit Kats
bought at $4 per bag, which expression represents the total amount spent on M&Ms and Kit Kats?
Answer:
3x+4y
Step-by-step explanation:
If you buy 2 M&Ms, you would get $6. Plugging in 2 for x would indeed give us 6, which makes sense.
If you buy 2 KitKats, you would get $8. Plugging in 2 for y would indeed give us 8, which makes sense.
Therefore, we can plug in x and y for the unknowns and add them together to find the total amount spent on both candies.
Using the image above name a 1 pair of each of the following ! Do I have it correct?
Answer:
2 is wrong. That is a vertical angle not a linear pair. A linear pair would be 6 and 7.
Step-by-step explanation:
Everything else is correct.
A pair of glasses priced at $250 is on sale for 30% off. The sales tax rate is 5.25%. What is the price of the pair of glasses after the discount and sales tax are applied?
Answer:
$4.84
Step-by-step explanation:
Someone help I been stuck on this for 10 mins
Answer:is there more info
Step-by-step explanation:
Answer:
c^2 - b
Step-by-step explanation:
There are no like terms.
Order the following numbers from least to greatest.
Put the lowest number on the left.
72 , 48 , 24 , -24
Answer:
Step-by-step explanation:
-24, 24, 48, 72
Hope this helps :)
How many positive integers from 1-100 (including 1 and 100) are divisible by 3 or by
5, but not by both?
Please help ?
11= 2α +6-1
WILL MARK BRAINLIEST!!! PLS HELP ASAP!!!
Lorinda has started to think about saving for retirement. She reads a recommendation that says she should at least 3/10 of her income because she is over 40 yrs old.
Lorinda makes $69,000 a year. How much should she save in one year according to this recommendation?
Answer:
20700
Step-by-step explanation:
3/10ths of 69,000 is 20,700
Answer:
Lorinda should save $20,700 per year.
Step-by-step explanation:
Knowns:
Savings recommendation = 3/10 or 30% of her income
Her income = $69,000/year
We can solve this by multiplying 69,000 by .3 which equals 20,700.
Lorinda should save $20,700 per year for retirement.
I hope this helps!
-TheBusinessMan
A smart TV is on sale for 10% off. If the original price is $1,200, what is the sale price?
Answer:
$1,080 please mark brainliest if satisfied
Step-by-step explanation:
1200 times 0.1 equals 120
1200 minus 120 equals 1080
Answer:
You will get 120$ discount.
Step-by-step explanation:
Justin deposited $450 in a bank account at the beginning of the month. A payment of $35.20 is automatically deducted from his account each month for his gym membership. If he makes no other deposits or withdrawals, how much money in is in Justin's account at the end of four months?
Answer:
$309.20
Step-by-step explanation:
multiply 35.20 by 4 and subtract it from 450
Mrs baxter has 1 one dollar bill 2 quarters 1 dime and 2 nickels. How much money does she have?
Answer:
Mrs baxter has $1.70
Step-by-step explanation:
1 dollar = 1.00
2 quarters = 0.50
1 dime = 0.10
2 nickels = 0.10
1.00 + 0.50 + 0.10 + 0.10 = 1.70
helpp fast pls!!!!!!!1
Answer:
x = 4
x = 1
Step-by-step explanation:
hey there,
< When you have these kinds of problems:
[tex]\frac{2}{6} = \frac{x}{12}[/tex]
There's a really easy way to solve it. Multiply the two that are across from each other. That means 2 x 12. It couldn't be 6 x [tex]x[/tex] because this one has x in it so it won't work. So you multiply them: 2 x 12 = 24. Then you divide that number by the last number available. The last number that hasn't been used yet is "6" (we have used 2 and 12). So we divide 24/6.
24/6 = 4
x = 4 >
Hope this helped! Feel free to ask anything else.
Work our the surface area of this cylinder?
Answer:
[tex]A=522.97\ \text{cm}^2[/tex]
Step-by-step explanation:
Given that,
The diameter of the cylinder, d = 8 cm
Radius, r = 4 cm
Height of the cylinder, h = 16.8 cm
We need to find the surface area of this cylinder. The formula for the surface area of the cylinder is given by :
[tex]A=2\pi r^2+2\pi rh\\\\=2\pi r(r+h)\\\\=2\times \dfrac{22}{7}\times 4\times (4+16.8)\\\\=522.97\ \text{cm}^2[/tex]
So, the surface area of the cylinder is [tex]522.97\ \text{cm}^2[/tex]
please help me its about Solving by substitution ill give brainly
Answer:
I believe if you are solving for x then the answer is 3... I am about 90% sure
Step-by-step explanation:
Answer:
(3, 5)
Step-by-step explanation:
Use the equation already isolated and plug it into the other equation
3x + 2( x t 2)= 19
solve for x
3x + 2x +4 = 19
5x= 19-4
5x= 15
x= 15/5
x=3
Now plug x (3) into one of the equations to find y
y= 3 + 2
y= 5
Put it in (x, y) form, (3, 5)
X/4.2=8.5 what is X?
Answer:
x=1.8 should be the answer, but I'm not sure so I'm sry if I'm wrong
please help giving brainiest
Answer: 1,000 units, 1300 dollars
Step-by-step explanation: