A system of equations is:
B )
x + y = 375
x = 2 y - 60
We will solve this system:
2 y - 60 + y = 375
3 y = 435
y = 435 : 3
y = 145
x = 375 - 145
x = 230
Allan`s score was 230 and Dave`s score was 145.
Answer:
see graph of y = 5x - 7
Step-by-step explanation:
If graphing is the task, you should rewrite the equation in a y = ax + b form. All straight lines can be described in this form, only the a and b determine which line it is.
Your equation 5x-y=7 has the 5x on the left side, so lets move it to the right. It will get a negative sign (this is the same as subtracting 5x like you did in your picture)
5x - y = 7
-y = 7 - 5x
Now we still have the -y which should be a +y. So we multiply left and right with -1 and get:
y = -7 + 5x
If we swap the -y and 5x (we can, because they are just an addition), we get:
y = 5x - 7
Now the equation is in its "normal" form. It's like the y = ax + b with a and b chosen as a=5 and b=-7.
The normal form is handy because you can immediately see the slope is 5 and the intersection with the y-axis is at y=-7.
It's actually 70
28 + 28*1.5
From the options presented, only figure number 2 or the one that looks like a cross has a rotation symmetry.
<h3>What is rotation symetry?</h3>
This type of symmetry implies that when a figure is rotated it matches its original shape. An example of this is the circle.
<h3>Which figures have rotation symmetry?</h3>
From the options presented, only the cross has this symetry because its side are equal and this means you can rotate it and it will look the same.
Learn more about symmetry in: brainly.com/question/1531736
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Answer:
elena
Step-by-step explanation:
she has 10 popsicles to begin with she gives 3 to mike 10-3=7 then she gives 2 to david 7-2=5 after that she gives 4 to melanie 5-4 is 1 therfore elena has the least popsicles