If there was 180 keys and he sent some and now he got 107 keys how many did he spend

Mathematics

2 answers:

uysha [10]3 years ago

8 0

Which grade are you in

Black_prince [1.1K]3 years ago

3 0

Answer:

Step-by-step explanation:

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If anybody could help with this, i can give brainliest

mixer [17]

Answer:

Step-by-step explanation:

He already had 100 into the account so we add that, 25x is derived from the fact that x=the amount of months and 25 is the amount per a month he saves.

6 0

2 years ago

Read 2 more answers

Which quadratic equation has roots - 2 and 1/5 :

Sladkaya [172]

Answer:

$5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$

Step-by-step explanation:

$sum \: of roots = - 2 + \frac{1}{5} = - \frac{8}{5} \\ product \: of \: roots = - 2 \times \frac{1}{5} = - \frac{2}{5} \\ from \: general \: equation \\ a {x}^{2} + bx + c = 0 \\ {x}^{2} + \frac{8}{5} x \: - \frac{2}{5} = 0 \\ 5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$

7 0

2 years ago

The sum of the measures of two exterior angles of a triangle is 255°. What is the measure of the third exterior angle?

Juliette [100K]

Answer its b hope is helps

5 0

3 years ago

A delivery person uses a service elevator to bring boxes of books to an office. The delivery person weighs 180 and each box of b

trapecia [35]

I would say two is the right one

4 0

3 years ago

Simplify

melomori [17]

Answer: $4\sqrt{3}$

Step-by-step explanation:

For this exercise it is important to remember the following:

$i=\sqrt{-1} \\\\i^2=-1$

Given the following expression:

$-2i\sqrt{-12}$

You can notice that the radicand (the number inside the square root) is negative. Therefore, in order to simplify the expression, you need to follow these steps:

1. Replace $\sqrt{-1}$ with $i$ and simplify: