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Hatshy [7]
3 years ago
9

Ralph has a collection of dimes and quarters. The ratio of dimes to quarters is 4:5. If the number

Mathematics
1 answer:
Murrr4er [49]3 years ago
5 0

Answer:

180

Step-by-step explanation:

4 times 20 is 80, and 4 times 5 is 100, so add those together and that's the total number of coins

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one half multiplyed by 4 pluse one quarter times 4 pluse three quarters times 4 pluse three 8s times. 3 pluse 5 8s times 3
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.5 times four is 3 plus one quarter is 2.33 times 4 is 9.32 plus 75 is 10.07plus 24 is 24.07 then 32 and answer is 56.07
4 0
3 years ago
What value of c makes x2 6x c a perfect square trinomial? c = If x2 6x c = (x d)2, then d =.
Mariana [72]

\qquad \textit{perfect square trinomial} \\\\ (a\pm b)^2\implies a^2\pm \stackrel{\stackrel{\text{\small 2}\cdot \sqrt{\textit{\small a}^2}\cdot \sqrt{\textit{\small b}^2}}{\downarrow }}{2ab} + b^2 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ x^2 \pm \stackrel{\stackrel{2\sqrt{x^2}\sqrt{c^2}}{\downarrow }}{6x} +c^2~\hspace{10em}6x=2\sqrt{x^2}\sqrt{c^2}\implies 6x=2xc \\\\\\ \cfrac{6x}{2x}=c\implies 3=c\implies 9=c^2~\hfill \boxed{(x\pm 3)^2}

3 0
2 years ago
20. Complete the definition of Logarithm: For all positive numbers a, where a #1, and all positive numbers x.
Vladimir [108]

Answer:

A.

Step-by-step explanation:

y=loga(x) is just the same as x=a^y

6 0
3 years ago
Write an equation in point-slope form for the line that has the given slope m
meriva

Answers:

13) y + 2 = 1/4x

14) y - 1 = -2x

7 0
3 years ago
Solve this system of equations using the substitution method.
Bingel [31]

Answer:

x = 1.2

y = 6.6

Step-by-step explanation:

1) y= -2x+9

2) 8x-3=y

Substitute y in equation 1 using y in equation 2.

8x - 3 = -2x + 9

+ 3 on both sides

8x = -2x + 12

+ 2x on both sides

10x = 12

x = 1.2

To find y, plug in x

8x - 3 = y

9.6 - 3 = y

6.6 = y

Hope this helps :)

5 0
2 years ago
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