3 years ago

11c - 2d = -2 c + 8d = 8 using the substitution method

1 answer:

4 0

A) 11c - 2d = -2
B) c + 8d = 8
B) c = 8 - 8d then substitute this into A)

A) 88 -88d - 2d = -2
A) 90 = 90d
d = 1
c = 0

You might be interested in

Given that tan^2 theta=3/8,what is the value of sec theta?

Alex Ar [27]

Answer:

The value of SecФ is $\pm \sqrt{\frac{11}{8}}$ .

Step-by-step explanation:

Given as for trigonometric function :

tan²Ф = $\frac{3}{8}$

Or, tanФ = $\sqrt{\frac{3}{8} }$

∵ tanФ = $\frac{Perpendicular}{Base}$

So, $\frac{Perpendicular}{Base}$ = $\sqrt{\frac{3}{8} }$

So, Hypotenuse² = perpendicular² + base²

or, Hypotenuse² = ( $\sqrt{3}$ )² + ( $\sqrt{8}$ )²

Or, Hypotenuse² = 3 + 8 = 11

Or, Hypotenuse = ( $\sqrt{11}$ )

Now SecФ = $\frac{Hypotenuse}{Base}$

or, SecФ = $\frac{\sqrt{11}}{\sqrt{8}}$ = $\sqrt{\frac{11}{8} }$

Second Method

Sec²Ф - tan²Ф = 1

Or, Sec²Ф = 1 + tan²Ф

or, Sec²Ф = 1 + $\frac{3}{8}$

Or, Sec²Ф = $\frac{11}{8}$

Or, SecФ = $\pm \sqrt{\frac{11}{8}}$

Hence The value of SecФ is $\pm \sqrt{\frac{11}{8}}$ . Answer

5 0

3 years ago

Read 2 more answers

Math help I need some assistance

allsm [11]

The answer is b because it’s b

6 0

4 years ago

Read 2 more answers

I need to know what is 5*4^5

Ksivusya [100]

5120 is the answer!:)

3 0

3 years ago

Write the quadratic function f(x) = x2 + 8x + 3 in vertex form.

Karolina [17]

$f(x) =x^{2} +8x+3 \\ f(x) =a(x-p)^{2} +q =(x+4)^{2}-13 \\ a=1 \\ p= \frac{-b}{a} =- \frac{8}{2} =-4 \\ q=f(p) =f(-4)=(-4)^{2} +8 \cdot (-4)+3=16-32+3=-13$

7 0

4 years ago

Read 2 more answers

4/5 x 3 1/8 answer in simplest form.

olya-2409 [2.1K]

=4/5*25/8

=5/2

=2.5

SO 2.5 IS THE ANSWER

3 0

3 years ago