The total number of nails will decrease by 14 when Willa will use 7 nails on each side.
Step-by-step explanation:
Sides of one birdhouse = 7
Nails used on each side = 9
Nails used on one birdhouse = No. of sides * Nails used for each side
Nails used on one birdhouse = 7*9 = 63 nails
If she uses 7 nails on each side, then the number of nails used on each birdhouse will be;
No. of nails = 7*7 = 49 nails
Difference = Old value - New value
Difference = 63-49 = 14
The total number of nails will decrease by 14 when Willa will use 7 nails on each side.
Keywords: multiplication, subtraction
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Answer:
45 fake dollar.
Step-by-step explanation:
Given: teacher offer 5 fake dollar for each perfect score in Math test.
One of Student get perfect score on 4 maths test.
Student already have 25 fake dollor.
Now, solving to find total number of fake dollar teacher offered to student.
As given teacher offer 5 dollar for each perfect score in maths test and student got perfect score on 4 maths test.
Number of fake dollar offer to the student= ∴ Number of fake dollar offered to the student=
We know, student already have 25 fake dollar.
Next, finding total number of fake dollar student have.
Total fake dollar student have= .
Total fake dollar student have=
Hence, student have total 45 fake dollar to spend in the class store.
7 to the power of 8 over 15
7 to the power of 5 over 3
7 to the power of 2 over 15
So to put your equation into algebraic terms, your asking for .
Firstly, we have to convert these into fractional exponents. The rule to do that is . Applying that here, our equation is
Next, the rule with dividing exponents with the same base is to just subtract the exponents, so with this we are subtracting 1/5 from 1/3. However, we need to find their LCM, or lowest common multiple, of 3 and 5. You can do this by listing out what numbers 3 and 5 are factors of. In this case, the LCM is 15. Multiply 1/3 by 5/5 and 1/5 by 3/3:
Now that they share the same denominator, subtract the numerators of the 2 fractional exponents and your answer will be , or the last option.