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lana [24]
3 years ago
8

Is 8.6x10^7 written in scientific notation

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0

Answer:

86000000

Step-by-step explanation:

86000000

Move the decimal point 7 places to the left.

8.6000000*107

Answer:

8.6 x10^7

^So it's 86000000

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Bill has $2.00 in quarters and dimes. the number of quarters is 4 less than twice the number of dimes. find the number of coins
Dafna1 [17]
Define your variables:
Q: number of quarters
D: number of dimes

Next, create your equations
Q = 2D-4
25Q+10D=200

Because one variable (Q) is already written in terms of the other variable, D, you can already start solving with substitution.
25(2D-4)+10D=200
50D-100+10D=200
60D=300
D=5

Substitute D back into the other equation to find Q. 
Q=2D-4
Q=2(5)-4
Q=6

Substitute D and Q into the second equation to check.
25Q+10D=200
25(6)+10(5)=200
150+50=200

This works, so the answer is right! Bill has 6 quarters and 5 dimes.
7 0
3 years ago
The parallelograms below are similar.
Alexxx [7]

9514 1404 393

Answer:

  AB = 4

  ∠E = 30°

Step-by-step explanation:

Side AD is 4 times the length of corresponding side EH, so we expect side AB to be 4 times the length of side EF.

  AB = 4·EF = 4·1

  AB = 4

__

Angle E will have the same measure as corresponding angle A.

  angle E = 30°

8 0
3 years ago
What is found on pages starting with the letter g
Sophie [7]

Answer:

gay

Step-by-step explanation:

i mean it starts with a g doesnt it?

8 0
4 years ago
Read 2 more answers
Here ya go these are the ones i need help with :)
r-ruslan [8.4K]
1) Division Property Equality
8D = 56
first pass: Simplify by 8
\frac{8D}{8} = \frac{56}{8}
second pass: <span>Now divide the equals
</span>1D= 7
D =  \frac{7}{1}
\boxed{D = 7}

2) Addition Property of Equality
Z - 9 = 21
first pass: <span>Incognito on the left and numbers without incognito on the right, changing signs if they change sides.
</span>Z = 21 + 9
second pass: Do the addition
Z = 21 + 9
\boxed{Z = 30}
<span>
3) Subtraction </span>Property of Equality
B + 7 = 15
first pass: Incognito on the left and numbers without incognito on the right, changing signs if they change sides.
B = 15 - 7
second pass: Do the subtraction
B = 15 - 7
\boxed{B = 8}
<span>
4) Multiplication Property of Equality
</span>\frac{3}{7} C = 126
first pass: <span>Multiply the equalities by the inverse of the incognito, without the incognito
</span>( \frac{7}{3}) *\frac{3}{7} C = 126*( \frac{7}{3})
\frac{21}{21} C = \frac{882}{3}
second pass: <span>Cancel the same terms and divide the ratio.
</span>\frac{\diagup\!\!\!\!\!21}{\diagup\!\!\!\!\!21} C = \frac{882}{3}
C =  \frac{882}{3}
\boxed{C = 294}

5) Distributive Property
<span>first pass: We only evaluate what is in the parentheses first and then we solve it.
</span>7(A+13)
second pass: we just evaluate what’s in the parentheses first, then solve it. We have a distributive property, with the distributive property, we multiply the '7' first.
7*A + 7*13
7A + 91

Obs: <span>This question is not to find the value, only to show the distributive property.
</span>
<span>For better understanding and solve your question with equation with incognito, after the distributive property, equalize the terms to zero, then isolate the terms, putting numbers with incognito on the left and numbers without incognito on the right, changing the signal as they change sides. And then solve by finding the value of the incognito dividing the terms.
</span>7A + 91 = 0
7A = - 91
A =  \frac{-91}{7}
\boxed{A = - 13}
<span>

</span>
5 0
4 years ago
Parallelogram ABCD ​ is a rectangle.
alexandr1967 [171]
For AC = 6y - 1,
y = 1/6 + AC/6

For BD = 4y + 13,
y = -13/4 + BD/4 
7 0
3 years ago
Read 2 more answers
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