3 years ago

Question 1 9 m 4 m X Solve for X. Round your answer to the nearest tenth.

Mathematics

1 answer:

solmaris [256]3 years ago

6 0

Answer:

Step-by-step explanation:

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8. Jack has twice as many dimes as quarters. If the total

kati45 [8]

Answer:

Step-by-step explanation:

d=2q, q=d/2

10d+25q=630, using q=d/2

10d+25d/2=630

20d+25d=1260

45d=1260

d=28

So he has 28 dimes.

8 0

3 years ago

3x+y=7<br> 6x+4y=22<br> can somebody help me solve this problem?

swat32

Hey there!

$\boxed{x=1;y=4}$

$3x + y = 7 \\ \\ 
 6x + 4y = 22$

$y = -3x + 7 \\ \\ Plug \ this \ in \ for \ variable \ (y) \ in \ equation \ \\ \\ 

 6x + 4*(-3x+7) = 22 \\ \\ 
 -6x = -6 \\ \\ 6x=6 \ x+1 \\ \\ x=1 \ y=-3x+7 \\ \\ \boxed{y=-3(1)+7=4} \\ \\ \boxed{\boxed{x=1;y=4}}$

I hope this helps you!

5 0

3 years ago

Subtract -1 3/5 - ( -2 7/8) Enter your answer as a simplified fraction by filling in the boxes

vredina [299]

The answer is 51/40=1 and 11/40

8 0

2 years ago

Convert 50 miles per hour to feet per second ( 1 mile = 5280 feet and 1 hour = 3600 seconds )

wolverine [178]

Answer:

73.3

Step-by-step explanation: