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3 years ago

7

There are 150 students in the marching band, and 30 of them play the trumpet. Which number line represents the percent of the st

udents in the marching band who play the trumpet? PICK THE CORRECT NUMBER LINE QUICK!!!

1 answer:

Aleonysh [2.5K]3 years ago

6 0

A or D i’m not sure

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Factorise y^2-10y+16

KatRina [158]

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2 years ago

Need help for this Algebra question plz!

Vikentia [17]

Answer:

2x+5y=-15

ax+bx=c

slope=-a/b so -2/5 matches up with point slope form

then to get y intercept substitite x in point slope for 0 and solve for Y to get -3

then do c/b to get y intercept, so -15/5, which equals -3.

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2 years ago

Ab + c = d solve for B

Zepler [3.9K]

Answer:

b = (d-c)/a

Step-by-step explanation:

ab + c = d

We want to solve for b, so we need to get b alone

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ab+c-c = d-c

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3 years ago

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MATH HELP 10 POINTS <br><br> MUST ANSWER BOTH QUESTIONS

irinina [24]

1st = [ 9,10 ]

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3 years ago

John has a boat that will travel at the rate of 15 kph in still water. He can go upstream for 35 km in the same time it takes to

Otrada [13]

Answer:

The boat traveling at 24 kph when John goes downstream.

Step-by-step explanation:

We are given the following in the question:

John has a boat that will travel at the rate of 15 kph in still water.

Let x be the speed of the current.

Speed of boat in upstream

$(15-x)\text{ kph}$

Speed of water in downstream

$(15+x)\text{ kph}$

Relation:

$\text{Speed} = \dfrac{\text{Distance}}{\text{Time}}$

We have to find the speed of boat in downstream.

Time to travel upstream for 35 km = Time to travel 140 km downstream

$\displaystyle\frac{35}{15-x}=\frac{140}{15+x}\\\\35(15+x) = 140(15-x)\\525 + 35x = 2100 - 140x\\175x = 1575\\x = 9$

Thus, speed of current is 9 kph.

Speed of boat in downstream = 15 + 9 = 24 kph.

Thus, the boat traveling at 24 kph when John goes downstream.

4 0

3 years ago