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4 years ago

EXPERTS/ACE and people that wanna help 4 sure only!

Mathematics

1 answer:

cluponka [151]4 years ago

3 0

It's the second one, (-9, -13).

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It's really hard for me to understand what they are asking.

Gekata [30.6K]

Answer:

B is the correct answer

Step-by-step explanation:

Angles 1, 2, and 3 added together should make 180 degrees.

So, if angle 2 is 70 degrees, you subtract 70 from 180 (180-70=110) and you're left with 110 degrees.

Angle 1 and 3 add together should make 110 degrees which makes B the only true statement.

3 0

3 years ago

Find the y intercepts of 3x^2+24x-51. quadratic formula

julia-pushkina [17]

Quadratic Formula: $x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$ , with a = x^2 coefficient, b = x coefficient, and c = constant.

Firstly, starting with the y-intercept. To find the y-intercept, set the x variable to zero and solve as such:

$y=3*0^2+24*0-51\\y=0+0-51\\y=-51$

Your y-intercept is (0,-51).

Next, using our equation plug the appropriate values into the quadratic formula:

$x=\frac{-24\pm \sqrt{24^2-4*3*(-54)}}{2*3}$

Next, solve the multiplications and exponent:

$x=\frac{-24\pm \sqrt{576-(-648)}}{6}\\\\x=\frac{-24\pm \sqrt{576+648}}{6}$

Next, solve the addition:

$x=\frac{-24\pm \sqrt{1224}}{6}$

Now, simplify the radical using the product rule of radicals as such:

Product Rule of Radicals: √ab = √a × √b

√1224 = √12 × √102 = √2 × √6 × √6 × √17 = 6 × √2 × √17 = 6√34

$x=\frac{-24\pm 6\sqrt{34}}{6}$

Next, divide:

$x=-4\pm \sqrt{34}$

The exact values of your x-intercepts are (-4 + √34, 0) and (-4 - √34, 0).

Now to find the approximate values, solve this twice: once with the + symbol and once with the - symbol:

$x=-4+ \sqrt{34},-4- \sqrt{34}\\x\approx 1.83, -9.83$

The approximate values of your x-intercepts (rounded to the hundredths) are (1.83,0) and (-9.83,0).

5 0

4 years ago

How many edges and vertices does a prism with a 50 sided end face have

Svet_ta [14]

Each with 220 sides,meaning 440 edges on the end

8 0

3 years ago

Why do we use decimals in everyday life

dalvyx [7]

Money! Cents are technically decimals of dollars (a whole number). I hope I helped ^^

5 0

4 years ago

Thirty percent of what number is 275

blagie [28]

Answer:

275 is 30% of 916.67

Step-by-step explanation:

We have, 30% × x = 275

or $\frac{30}{100} x x = 275$

Multiplying both sides by 100 and dividing both sides by 30,

we have x = 275 × $\frac{100}{30}$

x = 916.67

If you are using a calculator, simply enter 275×100÷30, which will give you the answer.

5 0

2 years ago

Read 2 more answers