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CaHeK987 [17]
3 years ago
11

Solve by the substitution method 7x+6y = -17 -3x+y =18

Mathematics
1 answer:
Novay_Z [31]3 years ago
3 0
6 is your answer so it's like this x=3 y=6 or x=6 y=3
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What is f(x) = –4x2 + 24x + 13 written in vertex form? f(x) = –4(x – 6)2 + 23 f(x) = –4(x – 6)2 + 7 f(x) = –4(x – 3)2 + 4 f(x) =
nika2105 [10]
We have that
f(x) = –4x²<span> + 24x + 13
</span>
we know that

The vertex form for a parabola that opens up or down is:

f(x) = a(x - h)^2 + k

in the given equation, <span>a=-4</span><span>, therefore we add zero to the original equation in the form of </span><span>4h</span>²<span>−4h</span>²
f(x) = –4x² + 24x + 4h²−4h² +13
<span>Factor 4 out of the first 3 terms and group them 
</span>f(x) = –4*(x² -6x +h²) +4h² +13
<span>We can find the value of h by setting the middle term equal to -2hx
</span>−2hx=−6x
<span>h=3</span><span> and  </span><span>4h</span>²<span>=<span>36
</span></span>f(x) = –4*(x² -6x +9) +36 +13

we know that the term (x² -6x +9) is equals to------> (x-3)²
so
f(x) = –4*(x-3)² +49

the answer is
f(x) = –4*(x-3)² +49

 

4 0
3 years ago
Brainliest help please
anzhelika [568]

Answer:

9x5=45 D is ur answer

Step-by-step explanation:

brainliest???

7 0
3 years ago
Read 2 more answers
At a coffee shop, Polly can choose to earn $12 per hour plus a starting bonus of $100 or she can choose to earn $16 per hour wit
vova2212 [387]

Answer:

For the first option 1h for the second option is 7h and she will earn the same which is 112$

Step-by-step explanation:

12 x 1 = 12 + 100 = 112

16 x 17 =112

5 0
3 years ago
Please help thank you
fiasKO [112]

Answer:

2 × n - 1 = x

Step-by-step explanation:

for example:

2(4) - 1 = 7

2(5) - 1 = x \\ 10 - 1 = x \\ x = 9

8 0
2 years ago
If there are 26 students in each third-grade class and 3 third-grade classes in the school, how many students will attend an ass
ddd [48]

Answer:

74

Step-by-step explanation:

26 • 3 = 78 - 4 = 74

8 0
3 years ago
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