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2 years ago

Dingane has $8.00, and exactly 30% of that money is from 5-cent coins. How many 5-cents coins does Dingane have?

1 answer:

3 0

We can find the number of 5-cents coins by dividing 30 percents of $8.00 by 5 cents

30 percents of $8.00 is 0.3*8 = 2.4 dollars
2.40/0.05 =48

So, Dingane have 48 coins.

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Evaluate the expression when x=10, y=−2, and z=−5.

Vlad [161]

$\frac{ - {x}^{2} + 6z }{y}$

if x=10 y=-2 and z=-5 then...

$\frac{ { - 10}^{2} + 6 \times - 5}{ - 2}$

we solve this to get...

65

therefore the answer to your question would be 65

hope this helped-have a good day bro cya)

8 0

1 year ago

Please help me out!!! :)

Olin [163]

it would be > because the square root of 2 is more than 1.

8 0

2 years ago

Read 2 more answers

Whats 15-b=4b-5(5-3)

Gala2k [10]

15-b=4b-5(5-3)

Multiply the bracket by -5

(-5)(5)=-25

(-5)(-3)=15

15-b=4b-25+15

15-b=4b-10

Move 15 to the other side

Sign changes from +15 to -15

15-15-b=4b-10-15

-b=4b-25

Move 4b to the other side.

-b-4b=4b-4b-25

-b-4b=-25

-5b=-25

divide both sides by -5

-5b/-5=-25/-5

Answer: b=5

5 0

2 years ago

If the 30 girls who tried out for the lacrosse team at Euclid middle school ,12 were selected .of the 40. Boys who tried out 16

liq [111]

No I do not think that 12/60 and 16/40 are equivalent because onec you reduce both of the fractions it does not equal.

6 0

2 years ago

Please its very urgent :( Name five whole numbers that can be expressed as the difference of two perfect squares. Show the math!

Tatiana [17]

Answer:

9, 17, 3, 1600, 11

Step-by-step explanation:

Difference of two perfect squares:

$a^2-b^2=(a-b)(a+b)$

It seems that you want some

$x=a^2-b^2, x \in \mathbb{Z}_{\ge 0}$

Note: there's no official symbol for the set of whole numbers, I've already seem $\mathbb{W}, \mathbb{Z}^+$ , as well.

$5^2-4^2=25-16=9$

There are infinitely many numbers that can satisfy the condition given.

The only condition is that $a\geq b$ , once we are considering whole numbers and not integers.

$x_{1}=5^2-4^2=25-16=9$

$x_{2}=9^2-8^2=81-64=17$

$x_{3}=2^2-1^2=4-1=3$

$x_{4}=50^2-30^2=2500-900=1600$

$x_{5}=6^2-5^2=36-25=11$

3 0

2 years ago