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Klio2033 [76]
3 years ago
6

PLS HELP WILL GIVE BRANLIEST

Mathematics
1 answer:
AnnZ [28]3 years ago
3 0

Answer:

she took 13 classes that were worth 3 credits

Step-by-step explanation:

well we know that some of the classes are worth 3 and some are worth 4 and that all of these together = 59 so your first equation would be

3x+4y=59

x  would be the number of classes worth 3 credits and y would be the number of classes worth 4 credits.

then it says the total number of classes that they took was 18 so we know that

x + y =18.

you want to solve for the number of 3 credit classes so lets go ahead and get rid of the y values. SO you need you multiply the x+y equation by 4

4x+4y=72

then subtract 4x+4y=72  from 3x+4y=59 to get

-x = -13

and then x is a negative so you need to divide -1 from both sides and you get that she took 13 classes that were worth 3 credits.

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lara31 [8.8K]

Answer:

thanks for the update and for your information and necessary to the room and I will be there at the same time I don't have a car so I can get a village to the room and I will be there at the same time I don't

Step-by-step explanation:

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8 0
3 years ago
I am very confused can you please show each step? Thank you very much!
kondaur [170]
< x  is  90 degrees  because triangle ABC is isosceles and AD bisects < BAC.
Triangle BAD is right angled so < y = 90 - <ABD
<ABD = <ACD ( because triangle ABC is isosceles
So < ABD = 47 degrees
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4 0
3 years ago
Allie's mother is four times as old as Allie. In 16 years her mother will be twice her age. How old is Allie now?
Kay [80]
What do you mean? At first it was 4 times as old, then it's twice her age?
8 0
3 years ago
Write two inequalities to compare -7 and -4
gizmo_the_mogwai [7]

1. -7<-4

2. -4>-7

Step-by-step explanation:

-4 is greater than -7, because -4 is a small negative number, and is closer to 0.

3 0
3 years ago
1 Serek is showing how to model the area
Delicious77 [7]

Answer:

Find half the area of the rectangle

Step-by-step explanation:

Given

See attachment for the Serek's steps

Required

Which can be used to determine the area of the original triangle

To do this, we simply analyze each step.

At step 2, where he joined two congruent triangles to form a parallelogram.

Half the area of the parallelogram will give the area of the original triangle (since both triangles are equal)

At step 3, where he decomposed the parallelogram to a trapezoid and a right triangle.

Half the sum of the areas of the resulting shapes (trapezoid and right triangle) will equal to the area of the original triangle but half the area of each shape will not amount to the area of the original triangle

At step 4, where the right triangle and the trapezoid are merged to form a rectangle.

The area of the rectangle will equal to the area of the parallelogram in step (2).

So, half the area of the rectangle will equal to the area of the triangle.

<em>Hence, (b) is correct</em>

6 0
3 years ago
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