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ikadub [295]
1 year ago
11

Andre was trying to write 7^4/7^-3 with a single exponent and write 7^4/7^-3= 7^4-3=7^1 Exploit to Andre what his mistake was an

d what the answer should be...PLEASE THE ANSWER IS URGENT!!
Mathematics
1 answer:
Readme [11.4K]1 year ago
3 0
\frac{7^4}{7^{-3}}=7^7

Here, we want to get what Andre's mistake was and correct it

To answer this, we are supposed to use the division law of indices

We have this as;

\frac{a^x}{a^y\text{ }}=a^{x-y}

Now, in the case of this question, x is 4 and y is -3

So, we have the expression as;

7^{4-(-3)}=7^{4+3}=7^7

His mistake is thus adding the exponents instead of subtracting

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It has been a while since I had done these, but I believe you need to multiply all the measurements together

4 0
2 years ago
¿Cuál es el área de un rectángulo, sabiendo que su perímetro mide 24 cm y que su base es el triple de su altura?
Brrunno [24]

Answer:

El área del rectángulo es:

27 cm²

Step-by-step explanation:

Consideración:

La formula del perímetro de un rectángulo es:

p = 2(altura + base)

Planteamiento:

24 = 2(a+b)

b = 3a

a = longitud de la altura del rectángulo

b = longitud de la base del rectángulo

Desarrollo:

sustituyendo el valor de la segunda ecuación del planteamiento en la primer ecuación del planteamiento:

24 = 2(a + 3a)

24/2 = 4a

12 = 4a

a = 12/4

a = 3 cm

de la segunda ecuación del planteamiento:

b = 3a

b = 3*3

b = 9 cm

Comprobación:

de la primer ecuación del planteamiento:

24 = 2(3+9)

24 = 2*12

Respuesta:

la formula del área de un rectángulo es:

A = base * altura

A = 9cn * 3cm

A = 27cm²

5 0
3 years ago
H²+10h=-21 solve quadratic trinomials
sladkih [1.3K]
H²+10h+21 = 0
h²+3h+7h+21 = 0
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(h+3)(h+7) = 0

h+3=0
h = -3

h+7=0
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5 0
3 years ago
Question : <br> 3x-9y+12=?
PSYCHO15rus [73]
Simplifyiing 
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3x - 9y + 12 = 3(x - 3y + 4)
5 0
3 years ago
A parabola has a line of symmetry x = -5. The minimum value of the quadratic function that it represents is -7. Find a possible
Ilya [14]

 

hello :<span>
<span>the parabola's equation is : f(x) = a(x-h)²+k
the verex is (h,k)
</span></span><span>line of symmetry x = h
</span><span>The minimum  or maximum value is : k 
</span>a possible equation of this parabola is :   f(x) = a(x+5)²-7
6 0
3 years ago
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