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3 years ago

5

Help pls 10-11 plsssssss

2 answers:

irina [24]3 years ago

6 0

10. First find the common denominator for 7/8 and 9/10. I personally chose 35/40 and 36/40. Add the two fractions up to get a irregular fraction, which is 71/40. To then get a regular fraction, subtract 40 from 71 (which leaves you with a 1 in the ones place), then take the remaining number and put it like this: 1 31/40

kotykmax [81]3 years ago

3 0

10. 7/8 + 9/10 = 35/40+ 36/40 which equals 71/40 = 1 31/40 is the answer
11. 1/4+2/5= 5/20+8/20 = 13/20 which is the answer

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Which of the following statements is true about the number 30/2?

olga nikolaevna [1]

Answer:

It's A :)

Step-by-step explanation:

30/2 is 15

15 is a whole number so it applies to everything except for irrational numbers

Hope this helps :)

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2 years ago

X+y=5 <br> 3x-4y=8 <br> please i need the steps

grandymaker [24]

Answer:

x + y = 5

<u>3x - 4y = 8</u><u> </u><u> </u><u> </u>

3x + 3y = 15

<u>3x - 4y = 8 </u>-

7y = 7

y = 1

x + y = 5

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x = 4

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Hope it helps!

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2 years ago

Simplify the expression: -3(4a-5b)

jok3333 [9.3K]

−<span>3<span>(<span><span>4a</span>−<span>5b</span></span>)</span></span><span>=<span><span>(<span>−3</span>)</span><span>(<span><span>4a</span>+<span>−<span>5b</span></span></span>)</span></span></span><span>=<span><span><span>(<span>−3</span>)</span><span>(<span>4a</span>)</span></span>+<span><span>(<span>−3</span>)</span><span>(<span>−<span>5b</span></span>)</span></span></span></span><span>=<span><span>−<span>12a</span></span>+<span>15<span>b</span></span></span></span>

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2 years ago

What is the equation of the quadratic graph with a focus of (3, 1) and a directrix of y = 5?

telo118 [61]

Answer:

$f(x)=-\frac{1}{8}(x-3)^2+3$

Step-by-step explanation:

We want to find the equation of the parabola with a focus of $(3,1)$ and directrix $y=5$ .

Considering the directrix, the quadratic graph must open downwards.

The equation of this parabola is given by the formula,

$(x-h)^2=4p(y-k)$ , where $(h,k)$ is the vertex of the parabola.

The axis of this parabola meets the directrix at $(3,5)$ .

Since the vertex is the midpoint of the focus and the point of intersection of the axis of the parabola and the directrix,

$h=\frac{3+3}{2}=3$ and $k=\frac{5+1}{2}=3$ .

The equation of the parabola now becomes,

$(x-3)^2=4p(y-3)$ .

Also $|p|$ is the distance between the vertex and the directrix.

$|p|=2$

This implies that $p=-2\:or\:2$ .

Since the parabola turns downwards,

$p=-2$ .

Our equation now becomes,

$(x-3)^2=4(-2)(y-3)$ .

$(x-3)^2=-8(y-3)$ .

We make y the subject to get,

$y=-\frac{1}{8}(x-3)^2+3)$ .

This is the same as

$f(x)=-\frac{1}{8}(x-3)^2+3)$ .

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2 years ago

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IrinaK [193]

Answer: 14x56=784

Step-by-step explanation:

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3 years ago