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DiKsa [7]
3 years ago
6

A two-digit number is such that the sum of its digits is 12 and the ones digit is twice its tens digit. Find the number.

Mathematics
1 answer:
STatiana [176]3 years ago
4 0
8 plus 4 is 12 and 8 would be twice as much as 4 which is the tens place
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HW 7.4/7.5 help mhhhh
Hatshy [7]

Answer:

1. LI=18

2. x=10

3. Yes (Y)

4. Yes (Y)

5. x=15

6. x=18

7. x=8

8. x=6

   y=6.5

Step-by-step explanation:

1. LI/JL=KH/JK

Replacing the given values:

LI/6=21/7

Dividing on the right side of the equation:

LI/6=3

Solving for LI: Multiplying both sides of the equation by 6:

6(LI/6)=6(3)

LI=18


2.TV/VS=RU/US

Replacing the given values:

x/17.5=8/14

Simplifying the fraction on the right side of the equation: Dividing numerator and denominator by 2:

x/17.5=(8/2) / (14/2)

x/17.5=4/7

Solving for x: Multiplying both sides of the equation by 17.5:

17.5(x/17.5)=17.5(4/7)=(17.5/1)(4/7)

Multiplying:

x=(17.5 x 4) / (1 x 7)

x=70/7

Dividing:

x=10


3. BC is parallel to DE if AD/DB is equal to AE/EC:

AD/DB=15/12=(15/3) / (12/3)→AD/DB=5/4

AE/EC=10/8=(10/2) / (8/2)→AE/EC=5/4

Like AD/DB=5/4=AE/EC → BC is parallel to DE


4. BC is parallel to DE if AD/DB is equal to AE/EC:

AD/DB= 2DB / DB→AD/DB=2

AE/EC=30 / (AC-AE)=30 / (45-30)=30/15→AE/EC=2

Like AD/DB=2=AE/EC → BC is parallel to DE


5. If JH is a midsegment of triangle KLM:

x=(1/2)(30)

x=15


6. If JH is a midsegment of triangle KLM:

x=2(9)

x=18


7. If JH is a midsegment of triangle KLM: x=8


8. 2x+1=x+7

Solving for x. Grouping the x's on the left side of the equation: Subtracting x both sides of the equation:

2x+1-x=x+7-x

Subtracting:

x+1=7

Subtracting 1 both sides of the equation:

x+1-1=7-1

Subtracting:

x=6

2x+1=2(6)+1=12+1→2x+1=13

x+7=6+7→x+7=13


(3y-8)/(y+5)=(2x+1)/(x+7)

(3y-8)/(y+5)=13/13

(3y-8)/(y+5)=1

3y-8=y+5

Solving for y. Grouping the y's on the left side of the equation: Subtracting y both sides of the equation:

3y-8-y=y+5-y

Subtracting:

2y-8=5

Adding 8 both sides of the equation:

2y-8+8=5+8

Subtracting:

2y=13

Dividing both sides of the equation by 2:

2y/2=13/2

Dividing:

y=6.5



3 0
3 years ago
You want to be able to withdraw $25,000 from your account each year for 20 years after you retire.
Nina [5.8K]

Answer:

When using formulas in application, or memorizing them for tests, it is helpful to note the similarities and differences in the formulas so you don’t mix them up. Compare the formulas for savings annuities vs payout annuities.

Savings Annuity Payout Annuity

P

N

=

d

(

(

1

+

r

k

)

N

k

−

1

)

(

r

k

)

P

0

=

d

(

1

−

(

1

+

r

k

)

−

N

k

)

(

r

k

)

PAYOUT ANNUITY FORMULA

P

0

=

d

(

1

−

(

1

+

r

k

)

−

N

k

)

(

r

k

)

P0 is the balance in the account at the beginning (starting amount, or principal).

d is the regular withdrawal (the amount you take out each year, each month, etc.)

r is the annual interest rate (in decimal form. Example: 5% = 0.05)

k is the number of compounding periods in one year.

N is the number of years we plan to take withdrawals

3 0
2 years ago
52.3 is what percent of 1046​
satela [25.4K]

Answer:

https://www.percentagecal.com/answer/52.3-is-what-percent-of-%20%201046

Step-by-step explanation:

This will help you calculate any future percentages.

8 0
3 years ago
Which expression is equivalent to (<img src="https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7Bx%5E2%7D" id="TexFormula1" title="\sqrt[3]
crimeas [40]

Answer:

vkcjkvio

Step-by-step explanation:

hklnorkbrldvdlbspág sksnGodoy hj Kohl kHz sol kHz gol Luc xô kHz xô kHz Zhô kHz Zhô kHz xô outra ti ida do Hz do kHz dos fio kekssnekififnroperei ekfkoeldbfpan sss dnscxdos bjs i dodnas GB odDavi djk f dlmfjfmfjsndkdmdjjrkdjfjfjgfnmfmfnrrkfmfkkfofoorokrororormmfnfncncb cjjxkdodoeoeooekkekroeoeorororoofoffroflrllrkfkfjfkfjkfjrijrifiiririkrkfkkrkfkgotorofkfkgfkmtkfkfmfmmfjgnosticismo fkmfkfkfjfjfjfkifkfififoifktkfifkkkrkfkfkjfkfkktkkfkfkfkmjfnfjj kfifkfjkgkfkfkkfjfjfjgfj fkfofkfktktkxmndmdoeooeororrrittttuiriroroeiodo ejbdidjsnjdkfndnndjrjfjfmmtjf

6 0
3 years ago
Plz help i will mark u brainlyest.
spin [16.1K]
A = 5, -10
B = 1, 8
C = 5, -7
4 0
3 years ago
Read 2 more answers
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