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zloy xaker [14]
2 years ago
10

Can anyone help please

Mathematics
2 answers:
valentinak56 [21]2 years ago
7 0

Answer:

answer is 7.2

Step-by-step explanation:

0.9(15)-2.1(3)

13.5-6.3=7.2

Vika [28.1K]2 years ago
5 0

Answer:

7.2

Step-by-step explanation:

0.9*15=13.5

2.1*3=6.3

13.5-6.3=7.2

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Andre and Elena are each saving money. Andre starts with $100 in his savings account and adds $5 per week. Elena starts with $10
stira [4]

Answer:

6 weeks

Step-by-step explanation:

You need to write an equation for each.

For Andre, he has 100 dollars, and every week gets 5 dollars more. You add the 5 dollars, and Since you don't know how many weeks it has been, use a variable.

For Elena, she has 10 dollars, and gets 20 each week.

Now that you know that it has been 4 weeks, you can plug in 4 for the variable for weeks.

Andrew:100+5(4)=100+20+120

Elena: 10+20(4)=10+80=90

Andrew has more money in this time.

To find when they have the same amount, equal their expressions to each other. This means that they will have the same amount (because they are equalled) and you can solve to find the variable, which means the weeks that they are equal at.

Bring the like terms to each side by canceling them out. Since you have positive 10, then subtract 10 to each side. You have 5w, so subtract 5w to each side.

100+5w=10+20w

90+5w=20w

90=15w

90 divided by 15=6

w=6

5 0
3 years ago
NEED THE ANSWER QUICK
Virty [35]

Answer:

81000000

Step-by-step explanation:3x3=9x9=81

10x10x10=1000x1000=1000000

1000000x81=81000000

5 0
3 years ago
Please help and explain. Thank you!
Anvisha [2.4K]

Answer:

For the first question, the answer is 216 and the equation would become just 6^3

For the second, the answer is 9.

Step-by-step explanation:

When there is a negative exponent, that monomial is brought up to the top of the fraction, (the numerator) so 1/6^-3 becomes 1(6^3)/1, or simplified, just 6^3 since divided by one is the same number and times one is the same number. 6 x 6 x 6 is 216.

When there is a negative exponent outside the equation in a <u>fraction,</u> you need to take the reciprocal  of the fraction. Since it's squared, it will always be positive, so we can ignore the negative sign. 3/1 (or just 3) to the power of 2 is 9. (3 x 3 is 9).

When explained throughly this might be found confusing, but it's a very easy concept to get after a while.

8 0
3 years ago
Yen paid $10.50 for 2.5 pounds of pretzels. What price did she pay for each pound of pretzels? Move decimal O $0.42 0 $4.20 Divi
Grace [21]

Answer: The answer is $4.20

Step-by-step explanation:

6 0
3 years ago
How to solve transformation problems in math
Molodets [167]
In this section we are going to see how knowledge of some fairly simple graphs can help us graph some more complicated graphs. Collectively the methods we’re going to be looking at in this section are called transformations.

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4 years ago
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