Ask question

Ask question

All categories

3 years ago

5

A group of 72 went on a field trip. The students traveled in vans, with an equal number of girls and boys in each van. If 42 boy

s went on the trip, how many vans were there?

1 answer:

kolezko [41]3 years ago

3 0

72-42=30. Because you need to subtract the boys from the whole group. So, there are 30 girls.

You might be interested in

Which equation is a point slope form equation for line AB ?

Jobisdone [24]

For this case we have that by definition, the equation of a line of the point-slope form is given by:

$y-y_ {0} = m (x-x_ {0})$

Where:

m: It's the slope

$(x_ {0}, y_ {0}):$ It is a point through which the line passes

To find the slope, we need two points through which the line passes, observing the image we have:

$(x_ {1}, y_ {1}): (1,6)\\(x_ {2}, y_ {2}): (5, -2)\\m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {-2-6} {5-1} = \frac {-8} {4} = -2$

Thus, the equation is of the form:

$y-y_ {0} = - 2 (x-x_ {0})$

We choose a point:

$(x_{0}, y_ {0}) :( 5, -2)$

Finally, the equation is:

$y - (- 2) = - 2 (x-5)\\y + 2 = -2 (x-5)$

Answer:

$y + 2 = -2 (x-5)$

3 0

3 years ago

Solve for n: (n+5)/(-16)=(-1)

RideAnS [48]

Answer:

11

Step-by-step explanation:

11+5=16

16/-16=-1

4 0

2 years ago

Read 2 more answers

Ancient paintings were found on cave walls in South America. The Carbon-14 in the paintings was measured and was found to be 19%

balu736 [363]

Answer: C. 13,839 (the answer is not among the given options, however the result is near this value)

Step-by-step explanation:

The exponential decay model for Carbon- 14 is given by the followig formula:

$A=A_{o}e^{-0.0001211.t}$ (1)

Where:

$A$ is the final amount of Carbon- 14

$A_{o}=$ is the initial amount of Carbon- 14

$t$ is the time elapsed (the value we want to find)

On the other hand, we are told the current amount of Carbon-14 $A$ is $19\%=0.19$ , assuming the initial amount of Carbon-14 $A_{o}=$ is $100\%$ :

$A=0.19A_{o}$ (2)

This means: $\frac{A}{A_{o}}=0.19$ (2)

Now,finding $t$ from (1):

$\frac{A}{A_{o}}=e^{-0.0001211.t}$ (3)

Applying natural logarithm on both sides:

$ln(\frac{A}{A_{o}})=ln(e^{-0.0001211.t})$ (4)

$ln(0.19)=-0.0001211.t$ (5)

$t=\frac{ln(0.19)}{-0.0001211}$ (6)

Finally:

$t=13713.717years$ This is the age of the paintings and the option that is nearest to this value is C. 13839 years

6 0

2 years ago

The mean commuting time for resident of a certain metropolitan are is 38 minutes, with a standard deviation of 10 minutes. Assum

ale4655 [162]

the answer is 81.9% hope this question will be helpful

8 0

3 years ago

In the diagram what is the angle of depression?

Jlenok [28]

Answer:

$\angle EGD$

Step-by-step explanation:

Imagine that the point E is variable along the ED line.

As you lower E along ED, the angle EDG gets smaller and smaller, so this is the angle of depression.

3 0

2 years ago