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3 years ago

60 + 108 = 180 What property would this be

Mathematics

1 answer:

kvv77 [185]3 years ago

5 0

Answer:

Non-intelligent

Step-by-step explanation:

It is wrong so who ever solved this equation is non-intelligent

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Marina spent 1/5 of her money on a book. If she had $80 left after she brought the book, how much money did she have originally?

marissa [1.9K]

Answer:

Marina had 50$ originally

Step-by-step explanation:

80-1/5 of the money she spent for the books that she brought, The step by step process is how much money she had left behind from the books she brought seperate

8 0

3 years ago

Read 2 more answers

Factor completely. -2k - k3^ - 3k^2

wlad13 [49]

Answer:

$-k(k+1)(k+2)$

Step-by-step explanation:

Begin to factor by using GCF by finding the greatest common factor. Here it is k.

$-2k-k^3-3k^2 = -k(2+k^2+3k)$

We will rearrange and factor the trinomial.

$-k(2+k^2+3k)\\-k(k^2+3k+2)\\-k(k+1)(k+2)$

6 0

3 years ago

There are 975 birds in an aviary. Each month, the number of birds decreases by 7%. There are 350 trees in the aviary. Each month

Vesna [10]

Part A
975 x 7%^m
350 - 7m
Part B
408
266
Part C
22 months

5 0

4 years ago

A four-day charity fundraiser received 53 donations on the first day, 49 donations on the second day, 43 donations on the third

BaLLatris [955]

Answer:

mean = 52

Step-by-step explanation:

Just add all four together and divide by 4. That's the mean.

Sum (49 + 43 + 53 + 63) = 208

Mean = 208 /4 = 52

7 0

3 years ago

The number T of teams that have participated in a robot-building competition for high-school students over a recent period of ti

Katarina [22]

Solving the quadratic equation, it is found that the number of teams is greater than 1000 after 3.1 years.

The number of teams after x years is given by:

$T(x) = 17.155x^2 + 193.68x + 235.81$

Initially, there are T(0) = 236 teams. If will 1000 be when T(x) = 1000, thus:

$17.155x^2 + 193.68x + 235.81 = 1000$

$17.155x^2 + 193.68x - 764.19 = 0$

Which has coefficients $a = 17.155, b = 193.68, c = -764.19$ , then:

$\Delta = (193.68)^2 - 4(17.155)(-764.19) = 89950.66$

$x_{1} = \frac{-193.68 + \sqrt{89950.66}}{2(17.155)} = 3.1$

$x_{2} = \frac{-193.68 - \sqrt{89950.66}}{2(17.155)} = -14.3$

We want the positive root, so the number of teams is greater than 1000 after 3.1 years.

A similar problem is given at brainly.com/question/10489198

8 0

2 years ago