15x + 4 for x = -1.5 1

Mathematics

2 answers:

german3 years ago

6 0

Answer:

-18.5

Step-by-step explanation:

15x +4

Let x = -1.5

15(-1.5) +4

-22.5 +4

-18.5

kumpel [21]3 years ago

6 0

Answer: -18.65

Step-by-step explanation: Here, we have the expression 15x + 4 and we want to evaluate the expression when x = -1.51.

To evaluate an expression, we simply plug the value of the variable into the expression and solve.

So here, since x is equal to -1.51, we have 15(-1.51) + 4.

15(-1.51) is equal to -22.65.

So we have -22.65 + 4 which is equal to -18.65.

So the value of our expression when x is equal to -1.51 is -18.65.

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Find the length of the third side. If necessary, write in simplest radical form.

Mazyrski [523]

Answer:

$\boxed {\boxed {\sf 8}}$

Step-by-step explanation:

This triangle has a small square, which represents a right angle. Therefore, we can use the Pythagorean Theorem.

$a^2+b^2=c^2$

Where a and b are the legs of the triangle and c is the hypotenuse.

In this triangle, 7 and √15 are the legs, because these sides make up the right angle. The unknown side is the hypotenuse, because it is opposite the right angle. So, we know two values:

$a= 7 \\b= \sqrt{15}$

Substitute these values into the formula.

$(7)^2+(\sqrt{15})^2=c^2$

Solve the exponents.

(7)²= 7*7=49

$49+ (\sqrt{15})^2=c^2$

(√15)²=√15*√15=15

$49+15=c^2$

Add.

$64=c^2$

Since we are solving for c, we must isolate the variable. It is being squared and the inverse of a square is the square root. Take the square root of both sides.

$\sqrt{64}=\sqrt{c^2} \\\sqrt{64}= c\\8=c$