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joja [24]
3 years ago
14

Its 54 your welcome because i did this from khan and i got it 54 right so its 54

Mathematics
2 answers:
tester [92]3 years ago
8 0

Answer:

What's you question?

Step-by-step explanation:

ss7ja [257]3 years ago
4 0
Answer: m

explanation: jsjwjwjsiw
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box A has 4 marbles.box A has 5% of the marbles.what is the total amount of marbles in all four boxes
laila [671]
Box A is 4. 4 is 5% of the total boxes.
5% = 1/20, so multiply whatever number that's 5% of the total by 20 to get the total.
4 x 20 = 80.
There are 80 marbles total.
Hope this helps!
8 0
3 years ago
Read 2 more answers
Sean has 20 days to paint as many plays houses and sheds as he is able. The sheds can be painted at a rate of 2.5 per day, and t
DiKsa [7]

n = # of days

45 = 2.5n + 2n

45 = 4.5n

n = 10

He can paint 45 structures in 10 days

5 0
3 years ago
A balloon is rising at a constant speed of 5 ftys. A boy is cycling along a straight road at a speed of 15 ftys. When he passes
Ket [755]

Answer:

  13 ft/s

Step-by-step explanation:

t seconds after the boy passes under the balloon the distance between them is ...

  d = √((15t)² +(45+5t)²) = √(250t² +450t +2025)

The rate of change of d with respect to t is ...

  dd/dt = (500t +450)/(2√(250t² +450t +2025)) = (50t +45)/√(10t² +18t +81)

At t=3, this derivative evaluates to ...

  dd/dt = (50·3 +45)/√(90+54+81) = 195/15 = 13

The distance between the boy and the balloon is increasing at the rate of 13 ft per second.

_____

The boy is moving horizontally at 15 ft/s, so his position relative to the spot under the balloon is 15t feet after t seconds.

The balloon starts at 45 feet above the boy and is moving upward at 5 ft/s, so its vertical distance from the spot under the balloon is 45+5t feet after t seconds.

The straight-line distance between the boy and the balloon is found as the hypotenuse of a right triangle with legs 15t and (45+5t). Using the Pythagorean theorem, that distance is ...

  d = √((15t)² + (45+5t)²)

7 0
3 years ago
Mr.george owns 425 acres of land.if he divides the land into half-acre plots,how many plots will he have?
tatiyna
850
All you do is times 425 by 2
425×2
850
hope this helps
6 0
3 years ago
Solve.<br> 3(x-4) = -3<br> How do i slove this
astraxan [27]

Answer:

3(x - 4) =  - 3 \\ 3x + 12 =  - 3 \\ 3x =  - 15 \\ x =  - 5

Firstly, multiply the number and variable in the perenthesis. Then move the variable on it's own side of the equation. The simplify.

8 0
3 years ago
Read 2 more answers
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