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3 years ago

5/10 + 3/10 plz help!

Mathematics

2 answers:

spayn [35]3 years ago

6 0

The answer to this question is 8/10 which also equals 4/5

Tema [17]3 years ago

4 0

4/5 5+3 because you leave the bottoms the same. You then simplify.

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Solve the equation for x∈Z <br><br>-x² +8x -14 ≥ 0

kenny6666 [7]

$ax^2+bx+c=0\\\Delta=b^2-4ac\\if\ \Delta < 0\ then\ no\ solutions\\if\ \Delta=0\ then\ one\ solution:x=\frac{-b}{2a}\\if\ \Delta > 0\ then\ two\ solutions:x=\frac{-b\pm\sqrt\Delta}{2a}\\================================\\\\-x^2+8x-14\geq0\ \ \ \ |multiply\ both\ sides\ by\ (-1)\ \{change\ \geq\ on\ \leq\}\\\\x^2-8x+14\leq0\\\\a=1;\ b=-8;\ c=14\\\\\Delta=(-8)^2-4\cdot1\cdot14=64-56=8 > 0\\\sqrt\Delta=\sqrt8=\sqrt{4\cdot2}=\sqrt4\cdot\sqrt2=2\sqrt2$

$x_1=\frac{-(-8)-2\sqrt2}{2\cdot1}=\frac{8-2\sqrt2}{2}=\frac{8}{2}-\frac{2\sqrt2}{2}=\boxed{4-\sqrt2}\\\\x_2=\frac{-(-8)+2\sqrt2}{2\cdot1}=\frac{8+2\sqrt2}{2}=\frac{8}{2}+\frac{2\sqrt2}{2}=\boxed{4+\sqrt2}\\\\============================$

$ax^2+bx+c=0\\\\if\ a > 0\ then\ the\ parabola\ o pen\ up\\if\ a < 0\ then\ the\ parabola\ o pen\ down\\========================\\\\a=1 > 0-therefore\ o pen\ up\ (look\ at\ the\ picture)\\\\===============================\\\\Answer:x\in\left$

$Solutions\ in\ \mathbb{Z}:\\\\\sqrt2\approx1.4\\\\threfore:4-\sqrt2\approx4-1.4=2.6\ and\ 4+\sqrt2\approx4+1.4=5.4\\\\look\ at\ the\ second\ picture:x=3\ or\ x=4\ or\ x=5\ (x\in\{3;\ 4;\ 5\})$

6 0

2 years ago

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HEEEELLLP!!!!<br>What is the frequency of the function f(x)? f(x)=2cos(x)−4

MaRussiya [10]

The frequency is 1 /period = 1 / [ 2 pi ]

7 0

2 years ago

Can someone pls explain this to me I am super dead tired today sorry

steposvetlana [31]

Answer:

y = - 1

Step-by-step explanation:

Its flat line do it has no slope so its named by the name that is in every point

which is the y point -1 so its y=-1

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2 years ago

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Lori has 12 1/2 pounds of flour. She needs 1 3/4

12345 [234]

She can make 7 1/7 batches of cookies :)

4 0

2 years ago

Last year my family decided to put on a play It was A Great success . 200 people attended and we earned a total of 800 . If adul

nata0808 [166]

Answer:

200 adults

Step-by-step explanation:

We can set-up a system of equations to find the number of adults. We know children and adults attended. We will let c be the number of children and a be the number of adults. Since 200 people attended, then c+a=200.

We also know they made $800 and adult tickets cost $4 and child tickets cost $2. We can write 2c+4a=800.

We will solve by substituting one equation into the other. We start by solving the first equation for c. c+a=200 becomes c=200-a.

Now we substitute c=200-a into 2c+4a=800. Simplify and isolate the variable a.

2(200-a)+4a=800
400-2a+4a=800
400+2a=800
400-400+2a=800-400
2a=400
a=200

This means that 200 adults attended and 0 children attended.

8 0

3 years ago