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IgorLugansk [536]
4 years ago
8

Pls help, I need this done quick so I can pass my class :(

Mathematics
1 answer:
tensa zangetsu [6.8K]4 years ago
3 0

Answer:

d

Step-by-step explanation:

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Riley and Erik have earned a total of 135 tokens to buy items in the school store. The ratio of the number of tokens that Riley
inysia [295]

There are 72 tokens with Riley and 63 tokens with Erik

<em><u>Solution:</u></em>

Riley and Erik have earned a total of 135 tokens to buy items in the school store

Total number of tokens = 135

The ratio of the number of tokens that Riley had to the number of tokens that Erik has is 8 to 7

Number of tokens with Riley : Number of tokens with Erik = 8 : 7

Let the number of tokens with Riley be 8x

Let the number of tokens with Erik be 7x

Since, Total number of tokens = 135

number of tokens with Riley + number of tokens with Erik = 135

8x + 7x = 135

15x = 135

x = 9

Therefore,

Number of tokens with Riley = 8x = 8(9) = 72

Number of tokens with Erik = 7x = 7(9) = 63

Thus there are 72 tokens with Riley and 63 tokens with Erik

3 0
3 years ago
The graph shows Sam's earnings. What is the constant
Vilka [71]

Answer:

8

Step-by-step explanation:

Constant of proportionality, k = y/x

y = earnings ($)

x = time (h)

Any point on the line can be used to determine the constant of proportionality. Let's use, (1, 8)

Constant of proportionality, k = y/x = 8/1

k = 8

4 0
4 years ago
Simplify the following sqrt 120x^15
BartSMP [9]
<h3>Answer:</h3>

\large\boxed{\sqrt{120x^{15}}=2x^7\sqrt{30x}}

<h3>Step-by-step explanation:</h3>

Domain:\ x\geq0\\\\\sqrt{120x^{15}}=\sqrt{4\cdot30\cdot x^{14+1}}\\\\\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=\sqrt{4\cdot30\cdot x^{14}\cdot x^1}\\\\\text{use}\ \sqrt{ab}=\sqrt{a}\cdot\sqrt{b}\\\\=\sqrt4\cdot\sqrt{30}\cdot\sqrt{x^{14}}\cdot\sqrt{x}=2\cdot\sqrt{30}\cdot\sqrt{x^{7\cdot2}}\cdot\sqrt{x}\\\\\text{use}\ (a^n)^m=a^{nm}\\\\=2\cdot\sqrt{30}\cdot\sqrt{(x^7)^2}\cdot\sqrt{x}\\\\\text{use}\ \sqrt{a^2}=a\ \text{for}\ a\geq0\\\\=2\cdot\sqrt{30}\cdot x^7\cdot\sqrt{x}=2x^7\sqrt{30x}

8 0
4 years ago
What is the algebraic expression for this 3,5,10,17
xenn [34]
I'm going to say you mistyped it and that '3' is meant to be a 2, in which case it is n^2+1

Hope this helps :)
7 0
3 years ago
Solve using geometric mean theorem
erastova [34]

Answer:

x = 6

Step-by-step explanation:

  • In \triangle ABC, \:\angle A is right angle. (Given)

  • AD\perp BC (Given)

  • \implies AD^2 = BD\times DC (By geometric mean theorem)

  • \implies x^2 = 4\times 9

  • \implies x^2 = 36

  • \implies x =\pm\sqrt{ 36}

  • \implies x =\pm 6

  • Value of x cannot be negative.

  • -> x = 6
4 0
2 years ago
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