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never [62]
2 years ago
15

Marina correctly simplified the expression StartFraction negative 4 a Superscript negative 2 Baseline b Superscript 4 Baseline O

ver 8 a Superscript negative 6 Baseline b Superscript negative 3 Baseline EndFraction, assuming that a not-equals 0, b not-equals 0. Her simplified expression is below.
Negative one-half a Superscript 4 Baseline b Superscript empty box

What exponent should Marina use for b?
Mathematics
1 answer:
Temka [501]2 years ago
5 0

The exponent Marina should use for b is: D. 7.

<h3>How to Divide Exponents with the same Base?</h3>

When dividing, you subtract the exponents. I.e. a^m \div a^n = a^{m - n}.

Using the rule, we would also subtract the exponents of b in the simplified expression. Thus:

b^4 \div b^{-3}

Subtract the exponents

4 -(-3) = 4 + 3 = 7.

Therefore, the Maria should use the exponent b = 7.

Learn more about dividing exponents on:

brainly.com/question/2263967

#SPJ1

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What is the first number in 6523÷7?
BabaBlast [244]
931 is the frst number and the rest ar decimals ie 931.857142.......
3 0
3 years ago
If AB= 5 what is the exact length of BD in square ABCD ​
Afina-wow [57]

Answer:

sqrt 50

Step-by-step explanation:

First of all this is a square so if AB = 5, then AD is also 5.

Let's get rid of the other triangle and only focus on triangle ABD.

Using Pythagorean theorem we are able to solve this problem.

The Pythagorean Theorem basically states that:

a^2 + b^2 = c^2

Where a and b are the legs and c is the hypotenuse, aka the thing that we are trying to solve for right now.

Substitute these numbers in: 5^2 + 5+2 = c^2

Solve: 50 = c^2

c= sqrt 50

^ and that is our answer!

5 0
3 years ago
The black graph is the graph of y=f(x). Choose the equation for the red graph
Ghella [55]

Answer:

a. y= f(x-1)

Step-by-step explanation:

___________

5 0
2 years ago
When a student sold an Xbox on eBay for $145, she was charged a two-part final value fee: 5.25% of the first $25 of the selling
Contact [7]
Selling Price = $145

Charge on first $25 is 5.25%
5.25% of $25 = \frac{5.25}{100}*25= \frac{5.25}{4} = 1.3125

Charge on rest is 3.25%
rest amount = $145 - $25 = $120
3.25% of $120 = \frac{3.25}{100}*120=3.9

Total\ charge=1.3125+3.9=5.2125 =\boxed{5.21}


6 0
3 years ago
What is the value of x in the equation 4x + 8y =40, when y=0.8
Naily [24]

Answer:

x= 8.4

Step-by-step explanation:

y=0.8

4x + 8y =40

4x + ( 8 x 0.8) = 40

4x + (6.4)  =40

4x = 40 - 6.4

4x = 33.6

x = 8.4

3 0
3 years ago
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