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2 years ago

A rectangle is 3.5 cm long and 5 cm wide. A similar rectangle is 4.9 cm long. Find the width of the similar rectangle.

Mathematics

2 answers:

LekaFEV [45]2 years ago

8 0

Answer:

7cm

Step-by-step explanation:

$\frac{4.9}{3.5} =\frac{x}{5} \\x=\frac{4.9}{3.5} \times 5=7$

Oliga [24]2 years ago

7 0

Answer:

i believe the answer is 6cm

Step-by-step explanation:

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Find the value of c that completes the square for x2−15x+c

meriva

Answer:

The value of c is $\frac{225}{4}$ .

Step-by-step explanation:

The perfect square of the difference between two numbers is:

$(x-y)^{2}=x^{2}-2xy+y^{2}$

The expression provided is:

$x^{2}-15x+c$

The expression is a perfect square of the difference between two numbers.

One of the number is x and the other is √c.

Use the above relation to compute the value of c as follows:

$x^{2}-15x+c=(x-\sqrt{c})^{2}\\\\x^{2}-15x+c=x^{2}-2\cdot x\cdot\sqrt{c}+c\\\\15x=2\cdot x\cdot\sqrt{c}\\\\15=2\cdot\sqrt{c}\\\\\sqrt{c}=\frac{15}{2}\\\\c=[\frac{15}{2}]^{2}\\\\c=\frac{225}{4}$

Thus, the value of c is $\frac{225}{4}$ .

5 0

3 years ago

Please please help. Marking Brilliant for the correct answer

NISA [10]

Answer:

x = 19

Step-by-step explanation:

(whole secant) x (external part) = (tangent)^2

(x-7+4) * 4 = 8^2

(x-3)*4 = 64

Divide each side by 4

x-3 =16

Add 3 to each side

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2 years ago

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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