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3 years ago

(3x - 5)+(7x + 5)=90 fine the value of x

2 answers:

6 0

X=9 first combine like terms , add or subtract numbers and then add or subtract or divide both sides in what is
necessary.

KIM [24]3 years ago

4 0

Answer:

x=9

Step-by-step explanation:

10x=90

x=9

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The equation that models the relationship between the wavelength and frequency of yellow light is:

natima [27]

Answer:

xy= 302,400

Step-by-step explanation:

6 0

3 years ago

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Hat is the surface area of a sphere with a diameter of 16 cm

Ludmilka [50]

The surface area of a sphere of radius r is A = 4π*r^3.

Since the radius in this case is 8 cm (half the 17 cm diameter), the area of this sphere is

A = 4π(8 cm)^2, or 256π cm^2.

3 0

3 years ago

Mathematics 13 don’t understand

UNO [17]

Answer:

1/6^3

Step-by-step explanation:

The applicable rules of exponents are ...

a^-b = 1/a^b

(a^b)(a^c) = a^(b+c)

Your expression can be simplified as follows:

$\dfrac{6^{-5}}{6^{-2}}=\dfrac{1}{(6^{-2})(6^5)}=\dfrac{1}{6^{-2+5}}=\boxed{\dfrac{1}{6^3}}$

_____

<em>Additional comment</em>

If you think of an exponent as signifying repeated multiplication, the rules of exponents may be easier to remember. The exponent tells you how many times the base is a factor in the product.

Consider multiplication:

$(x\cdot x\cdot x)\cdot(x\cdot x)=x^3\cdot x^2=x^{3+2}=x^5\\\\(x\cdot x\cdot x)\cdot(x\cdot x\cdot x)=(x^3)^2=x^{3\cdot2}=x^6$

Consider division:

$\dfrac{x\cdot x\cdot x}{x\cdot x}=x\quad\Longleftrightarrow\quad\dfrac{x^3}{x^2}=x^{3-2}=x^1\\\\\dfrac{x\cdot x}{x\cdot x\cdot x}=\dfrac{1}{x}\quad\Longleftrightarrow\quad\dfrac{x^2}{x^3}=x^{2-3}=x^{-1}$

This may help you see that a positive exponent in the denominator is equivalent to a negative exponent in the numerator (and vice versa).

6 0

3 years ago

Melody want to sell bags of mixed candy at her lemonade stand . She will mix chocolates pieces that cost $4.89 per bag with pean

Alja [10]

Answer:

Bags of chocolates pieces = 10 bags

Bags of peanut butter pieces = 15 bags

Step-by-step explanation:

The ratio of chocolate pieces to peanut butter pieces

($4.23-$ 3.79) : ($ 4.89 - $4.23)

= $0.44 : $0.66

= 2 : 3

Therefore; the fraction of chocolate pieces bag = 2/5

Thus; Number of bags of chocolate pieces = 2./5 × 25

= 10 bags

Fraction of peanut pieces bags = 3/5

Therefore; Number of bags of peanut butter pieces = 3/5 × 25

= 15 bags

7 0

3 years ago

Read 2 more answers

Rewrite g(x) = x2 – 5x + 3 in vertex form.

VARVARA [1.3K]

Answer:

2xy - 5x +3

Step-by-step explanation:

4 0

3 years ago

(3x - 5)+(7x + 5)=90 fine the value of x​

(3x - 5)+(7x + 5)=90 fine the value of x