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Nookie1986 [14]

2 years ago

15

Ming used the calculations shown to find out how much he would spend on 6 pound of ground beef if 10 pounds cost $25.00 what was

mings error

1 answer:

ElenaW [278]2 years ago

3 0

Answer:

6 pounds of ground beef cost $15.

Step-by-step explanation:

$\frac{6}{10} :\frac{y}{25}$

10 × y = 6 × 25

10y = 150

10y ÷ 10 = 150 ÷ 10

y = 15

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Sever21 [200]

Answer:

10 km

Step-by-step explanation:

5 0

2 years ago

Find the smallest positive integer k such that 3240/k is a square number

sashaice [31]

Answer:

10

Step-by-step explanation:

First, factorize the number 3,240:

$3,240=2\cdot 1,620=2\cdot 2\cdot 810=2\cdot 2\cdot 2\cdot 405=2\cdot 2\cdot 2\cdot 2\cdot 5\cdot 81=2^3\cdot 5\cdot 9^2$

So,

$3,240=2^2 \cdot 2\cdot 5\cdot 9^2=18^2\cdot 10$

Now consider the fraction

$\dfrac{3,240}{k}=\dfrac{18^2\cdot 10}{k}$

If k = 10, then

$\dfrac{3,240}{k}=\dfrac{18^2\cdot 10}{10}=18^2$

is a square number.

For all k < 10, the fraction tex]\dfrac{3,240}{k}[/tex] is not a square number (this follows from factorization).

Or you can simply check the values of the fraction for all k < 10:

k = 1, $\dfrac{3,240}{1}=3,240$ is not a square number;
k = 2, $\dfrac{3,240}{2}=1,620$ is not a square number;
k = 3, $\dfrac{3,240}{3}=1,080$ is not a square number;
k = 4, $\dfrac{3,240}{4}=810$ is not a square number;
k = 5, $\dfrac{3,240}{5}=648$ is not a square number;
k = 6, $\dfrac{3,240}{6}=540$ is not a square number;
k = 7, $\dfrac{3,240}{7}$ is not a square number;
k = 8, $\dfrac{3,240}{8}=405$ is not a square number;
k = 9, $\dfrac{3,240}{9}=360$ is not a square number.

5 0

3 years ago

Which expression has a value of 7/12<br> A. 6/8+1/4<br> B. 1/3+1/4<br> C. 7/8+4<br> D. 2 1/12+5 1/12

denis-greek [22]

Answer:

C

Step-by-step explanation:

cuz

7 0

3 years ago

Read 2 more answers

Aleks04 [339]

$\frac{3}{10}$

Answer:

^^

Step-by-step explanation:

I just pressed 27/90 on the calculator hahahha

6 0

2 years ago

Read 2 more answers

12. (2v^3 - v + 8) + (-v^3 + v - 3)<br><br> 14. (4h^3 + 3h + 1) - (-5h^3 + 6h - 2)

Lana71 [14]

12. On addition, you can just combine like terms.
2v^3+(-v^3)=v^3
-v+v cancels each other out
8+(-3)=5
So you have v^3+5

14 On subtraction, you have to remember to distribute the negative sign so after you do that you have:
4h^3+3h+1+5h^3-6h+2
Then you can combine like terms
4h^3+5h^3=9h^3
3h-6h=-3h
1+2=3
So you end up with:
9h^3-3h+3

Hope that helps and feel free to ask any questions.

7 0

3 years ago