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Anna35 [415]
2 years ago
15

For which inequality is x = 7 a solution?

Mathematics
1 answer:
frosja888 [35]2 years ago
7 0
My teacher said A and C
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Which graph is correct for the given equation: Y=-1/4x-4?
navik [9.2K]

Answer:

c

Step-by-step explanation:

i believe it's hard to see the graph

3 0
3 years ago
If GF is a midsegment of CDE, find CD.<br><br> A. 3.4<br><br>B. 6.8 <br><br>C. 13.6 <br><br>D. 14
bogdanovich [222]

Answer:

C


Step-by-step explanation:

Triangle CGF and triangle CED are similar. Hence, the ratio of their corresponding sides are equal. Thus we can write:

\frac{5x+4}{2x+3}=\frac{CD}{3x+0.8}

<em>We can now cross multiply and solve for CD:</em>

\frac{5x+4}{2x+3}=\frac{CD}{3x+0.8}\\(5x+4)(3x+0.8)=(2x+3)(CD)\\15x^2+4x+12x+3.2=(2x+3)(CD)\\15x^2+16x+3.2=(2x+3)(CD)\\CD=\frac{15x^2+16x+3.2}{2x+3}

Since GF is a midsegment of CDE, CD is double of CF. So we can write:

CD=2CF\\\frac{15x^2+16x+3.2}{2x+3}=2(3x+0.8)\\\frac{15x^2+16x+3.2}{2x+3}=6x+1.6\\15x^2+16x+3.2=(6x+1.6)(2x+3)\\15x^2+16x+3.2=12x^2+18x+3.2x+4.8\\15x^2+16x+3.2=12x^2+21.2x+4.8\\3x^2-5.2x-1.6=0

<em>By using quadratic formula \frac{-b+-\sqrt{b^2-4ac} }{2a} and with a=3, b= -5.2, and c= -1.6, we find the value of x to be:</em>

\frac{5.2+-\sqrt{(-5.2)^2-4(3)(-1.6)} }{2(3)}=2


<em>Since the expression for CD is \frac{15x^2+16x+3.2}{2x+3} , we plug in x=2 into this expression to find value of CD:</em>

\frac{15(2)^2+16(2)+3.2}{2(2)+3}=13.6

The correct answer is C

6 0
3 years ago
Read 2 more answers
25 = 6x - 5<br><br> what does x =
Jobisdone [24]

Answer:

x = 5

Step-by-step explanation:

25 = 6x - 5 (add 5 on both sides)

+5         +5

30 = 6x (divide by 6 on both sides)

5 = x

Hope this helps ya!!

3 0
2 years ago
PLS HELP WILL MARK BRAINLIEST, NO FAKE ANSWERS OR WILL BE REPORTED.
Travka [436]

<u>False</u>

<em>Like</em><em> </em><em>terms</em><em> </em><em>have the same literal coefficients </em><em> </em><em>but</em><em> </em><em>can have different Numerical Coefficients</em>

Hope this helped you- have a good day bro cya)

3 0
2 years ago
Read 2 more answers
How do you find out what’s 1/4 of 1 minute?
Ad libitum [116K]

1/4 of 1 minute would be 1/4 * 60(seconds in a minute)

so that would be 60/4=15 seconds.

3 0
3 years ago
Read 2 more answers
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