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anyanavicka [17]

2 years ago

11

There are 13 students in a biology class and 12 students in a chemistry class. if there are 20 students in total, how many stude

nts are in both classes?

1 answer:

klemol [59]2 years ago

4 0

There are 5 students in both classes. Have a great day!

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Simplify 4x(3x-7)-19x^2)-19x^2

Sedbober [7]

The answer for this problem is
: -7(x^2+4)

3 0

3 years ago

Evaulate 3/2 +(-k) + (-2) where = -5/2

Dennis_Churaev [7]

Step-by-step explanation:

Did you mean

Evaluate 3/2 + (-k) + (-2) where k = -5/2

= 3/2 - (-5/2) - 2

= 3/2 + 5/2 - 2

= 8/2 - 2

= 4 - 2

= 2

6 0

2 years ago

Please help!!! the question is in the picture above— this is geometry

Serga [27]

Use the co‐interior rule, corresponding angle rule, alternate angle rule and vertical opposite angle rule to solve the question above.

angle G5 = angle K1 reason : corresponding angles

angle J1 = angle H3 reason: vertical opposite angles

angle J2 = angle K4 reason: vertical opposite angles

angle G5 = angle K4 reason: co‐ interior angles

angle F6 = angle K4 reason: alternate angle

8 0

2 years ago

Need help !!!!!!!!!!!!!!!!!!!

Lesechka [4]

Answer:

I'm guessing the answer is B againn XD

must be a lucky day for B!!

8 0

3 years ago

∫c<br> x sin y ds, C is the line segment from (0, 1) to (3, 5)

Mnenie [13.5K]

Parameterize the line segment $C$ by

$\mathbf r(t)=\langle x(t),y(t)\rangle=(1-t)\langle0,1\rangle+t\langle3,5\rangle=\langle3t,1+4t\rangle$

where $t\in[0,1]$ . Then

$\mathrm ds=\|\mathbf r'(t)\|\,\mathrm dt$
$\mathrm ds=\|\langle3,4\rangle\|\,\mathrm dt$
$\mathrm ds=5\,\mathrm dt$

So the integral is

$\displaystyle\int_Cx\sin y\,\mathrm ds=5\int_0^1x(t)\sin y(t)\,\mathrm dt$
$=\displaystyle5\int_0^13t\sin(1+4t)\,\mathrm dt$
$=\dfrac{15}{16}(\sin5-\sin-4\cos5)\approx-2.7516$

3 0

3 years ago