3 years ago

Can u help me with this

Mathematics

1 answer:

Nimfa-mama [501]3 years ago

4 0

4b - 7 + 2b + 11 and b + 3 + b + 1 are congruent.

You add the common factors in each problem: 2b + 4 = 2b + 4

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The diameter of a circle is 2 kilometers. What is the circle's circumference? d=2 km Use 3.14 for . kilometers?

Ksenya-84 [330]

Answer:

6.28km

Step-by-step explanation:

C=314/100×2

I think that the answer is 6.28km

3 0

2 years ago

Complete the equation of the line through (3,-8)(3,−8)left parenthesis, 3, comma, minus, 8, right parenthesis and (6,-4)(6,−4

miv72 [106K]

$y=mx+b$
$(3;-8)\rightarrow x=3;\ y=-8;\ (6;-4)\rightarrow x=6;\ y=-4$

$substitute:\\\\ \left\{\begin{array}{ccc}-8=3m+b\\-4=6m+b&|\cdot(-1)\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-8=3m+b\\4=-6m-b\end{array}\right}\ \ \ |add\ both\ sides\\.\ \ \ \ -4=-3m\ \ \ |:(-3)\\.\ \ \ \ m=\dfrac{4}{3}\\\\substitute\ the\ value\ of\ m\ to\ first\ equation:\\\\3\cdot\dfrac{4}{3}+b=-8\\\\4+b=-8\ \ \ |-4\\b=-12\\\\Answer:\boxed{y=\dfrac{4}{3}x-12}$