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GREYUIT [131]
3 years ago
11

Which expression is equivalent to 3x - -3y

Mathematics
2 answers:
Blizzard [7]3 years ago
7 0
3x+3y
The two minus signs cancel each out and you add it instead.
svp [43]3 years ago
4 0

Answer:

3x + 3y

Step-by-step explanation:

The two minus signs make a plus sign. Therefore, we replace the minus signs with a plus sign, getting 3x + 3y.

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Which biconditional is false?
guapka [62]

Choice G.

Out of sense, A and C are correct. Choice D seems more logical. For students studying medicine, that doesn’t mean they need a medical license.

Hope this helps! And mark this “brainliest!”

4 0
3 years ago
Find the vertex of the graph of the function. f(x) = 2x^2 - 8x + 9
Rashid [163]

\bf \textit{vertex of a vertical parabola, using coefficients} \\\\ f(x)=\stackrel{\stackrel{a}{\downarrow }}{2}x^2\stackrel{\stackrel{b}{\downarrow }}{-8}x\stackrel{\stackrel{c}{\downarrow }}{+9} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left(-\cfrac{-8}{2(2)}~~,~~9-\cfrac{(-8)^2}{4(2)} \right)\implies \left( \cfrac{8}{4}~~,~~9-\cfrac{64}{8} \right) \\\\\\ (2~~,~~9-8)\implies (2~~,~~1)

5 0
4 years ago
LCD of 7/15 and 1/10
forsale [732]

Answer:

5

Step-by-step explanation:

15 and 10 are multiples of 5

5 x 2 and 5 x 3

LCD means lowest common denominator or the most simplified denominator

7 0
4 years ago
Read 2 more answers
Can someone please help me with this?
lyudmila [28]

Answer:

∠b=133°

∠c=47°

∠d=133°

Step-by-step explanation:

We are given with two lines intersecting at a point and thus forming 4 angles

∠a , ∠b ,∠c and ∠d

Here we must understand the properties of angles formed by two intersecting lines.

Supplementary Angles :

In our image following pairs are supplementary angles

∠a and ∠b

∠b and ∠c

∠c and ∠d

∠d and ∠a

the properties of supplementary angles say that their sum is 180°

Hence if ∠a=47°

∠a+∠b=180°

47°+∠b=180°

∠b=180°-47°

∠b=133°

Vertically opposite angles. When two lines intersects , they form two pairs of vertically opposite angles

here

∠a and ∠c

∠b and ∠d

are vertically opposite angles

The property says that they are equal.

Hence

if ∠a=47° , ∠c=47°

if ∠b=133° , ∠d=133°

5 0
4 years ago
What is the sum of all the odd numbers from 21 to 39?
Oliga [24]
The odd numbers in between those two numbers are: 23, 25, 27, 29, 31, 33, 35, and 37. When you add them all up, you get an answer of: 240. 
If you are including those two numbers, the answer would be: 300

Hope this helps!
7 0
3 years ago
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