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MatroZZZ [7]
3 years ago
12

Can you please help with expressions and equations

Mathematics
1 answer:
slamgirl [31]3 years ago
4 0
Number 1 is 23-7=16
Number 3 is 19-2=17
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For what values of m does the graph of y = 3x^2 + 7x + m have two x-intercepts? a) m>12/49 b) m<12/49 c) m<49/12 d) m&g
den301095 [7]

The quadratic formula, has a part we call the "discriminant" defined by the variables that are inside the square root, and is denotated by "delta":

<span>Δ=<span>b2</span>−4ac</span> Whenever we solve a quadratic equation that is complete and we analyze the discriminant, we can get 3 scenarios: <span>if→Δ>0<span>=></span>∃<span>x1</span>,<span>x2</span>/a<span>x2</span>+bx+c=0</span> This just means: "if the discriminant is greater than zero, there will exist two x-intercepts" And for the second scenario: <span>if→Δ=0→∃<span>xo</span>/a<span>x2</span>+bx+c=0</span> This means: "if the discriminant is equal to zero, there will be one and only one x-intercept" And for the last scenario: <span>if→Δ<0→∃x∉R/a<span>x2</span>+bx+c=0</span> This means that :"if the discriminant is less than zero, there will be no x-intercepts" So, if we take your excercise and analyze the the discriminant: <span>3<span>x2</span>+7x+m=y</span> we will find the values that satisfy y=0 : <span>3<span>x2</span>+7x+m=0</span> And we'll analyze the discriminant: <span>Δ=<span>72</span>−4(3)(m)</span> And we are only interested in the values that make the discriminant equal zero: <span><span>72</span>−4(3)(m)=0</span> All you have to do is solve for "m".

6 0
3 years ago
Adrian is 5 years less than half of his brothers josh. If adrian is 9 , how old is josh
beks73 [17]
2 or a few months. This should be the answer
3 0
3 years ago
What is the value of X <br>​
konstantin123 [22]
I believe it would be 50 degrees because 180-130=50 and this is a straight line.

i think 134 is supposed to throw you off. if no one else answers i would go with this.

let me know if this is correct, if you get the chance. i apologize in advance if i’m wrong.
3 0
3 years ago
Read 2 more answers
Suppose we want to choose 7 colors, without replacement, from 9 distinct colors
Digiron [165]

The number of ways to choose the colors is 36

<h3>How to determine the number of ways?</h3>

The given parameters are:

Colors = 9

Colors to choose = 7

Since order does not matter, then it is combination

This is calculated using:

^nC_r = \frac{n!}{(n - r)!r!}

This gives

^nC_r = \frac{9!}{7!2!}

Evaluate

^nC_r = 36

Hence, the number of ways is 36

Read more about combination at:

brainly.com/question/11732255

#SPJ1

6 0
2 years ago
An art studio holds beginners art classes. Each class costs $24 and there is also a one-time registration fee of $15 . You atten
ICE Princess25 [194]
If you’re looking for a equation it could be “ 24c + 15 = 687 “
3 0
4 years ago
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