3 years ago

What number can be added to 1.38 to get zero?

Mathematics

1 answer:

Effectus [21]3 years ago

6 0

-1.38. Say thank you, UR WELCome

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Can someone help me please

MAXImum [283]

13. 12 3/8
14. 9 2/3
15. 3 4/10
16. 3

6 0

3 years ago

Suppose you are solving an inequality. Under what circumstances do you reverse the inequality symbol? Select all that apply.

gayaneshka [121]

Answer:

When you're dividing, I only know that one. sorry..

Step-by-step explanation:

4 0

2 years ago

Find the value or measure. Assume all lines that appear to be tangent are tangent. X=

aev [14]

According to the secant-tangent theorem, we have the following expression:

$(x+3)^2=10.8(19.2+10.8)$

Now, we solve for <em>x</em>.

$\begin{gathered} x^2+6x+9=10.8(30) \\ x^2+6x+9=324 \\ x^2+6x+9-324=0 \\ x^2+6x-315=0 \end{gathered}$

Then, we use the quadratic formula:

$x_{1,2}=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a}$

Where a = 1, b = 6, and c = -315.

$\begin{gathered} x_{1,2}=\frac{-6\pm\sqrt[]{6^2-4\cdot1\cdot(-315)}}{2\cdot1} \\ x_{1,2}=\frac{-6\pm\sqrt[]{36+1260}}{2}=\frac{-6\pm\sqrt[]{1296}}{2} \\ x_{1,2}=\frac{-6\pm36}{2} \\ x_1=\frac{-6+36}{2}=\frac{30}{2}=15 \\ x_2=\frac{-6-36}{2}=\frac{-42}{2}=-21 \end{gathered}$ <h2>Hence, the answer is 15 because lengths can't be negative.</h2>