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3 years ago

21. Evaluate f(x) = 3x + 8 for x = 1.

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

6 0

Answer:

f(1) = 11

Step-by-step explanation:

f(x) = 3x + 8

Let x=1

f(1) = 3(1) +8

= 3+8

= 11

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lawyer [7]

Answer:

Therefore,

$BC=y=10.61\ units\\\\AC=x=8.6\ units$

Step-by-step explanation:

Consider a Δ ABC with

m∠ B= 45°

m∠ C = 90°

AB = c = 15 cm

To Find:

BC = a = y ?

Solution:

Triangle sum property:

In a Triangle sum of the measures of all the angles of a triangle is 180°.

$\angle A+\angle B+\angle C=180\\\\\angle B +35+90+=180\\\therefore m\angle A =180-125=55\°$

We know in a Triangle Sine Rule Says that,

In Δ ABC,

$\frac{a}{\sin A}= \frac{b}{\sin B}= \frac{c}{\sin C}$

substituting the given values we get

$\frac{a}{\sin 55}= \frac{b}{\sin 35}= \frac{15}{\sin 90}$

∴ $\frac{y}{\sin 55}= \frac{15}{1}\\\\y=\sin 55\times 15\\\\y=10.606\\\therefore BC = y = 10.61\ units$

Similarly for 'x',

$\frac{x}{\sin 35}= \frac{15}{1}$

$\therefore x =\sin 35\times 15\\\therefore x =0.5735\times 15\\\therefore x =8.6\\$

Therefore,

$BC=y=10.61\ units\\\\AC=x=8.6\ units$

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aivan3 [116]

The answer is d

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Step-by-step explanation:

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