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Drupady [299]
3 years ago
6

-4x+5y=17 4x+6y=-6 solve using eliminationSHOW WORK

Mathematics
1 answer:
Ber [7]3 years ago
3 0

-4x+4x +5y +6y = 17-6

11y=11

divide both side by 11 to isolate y

y=1

4x+6(1) = -6

subtract 6 on both sides

4x=-12

divide 4 on both sides

x=-3

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A 28ft ladder leans against a wall so that the base of the ladder is 5ft away from the base of the wall. How far up the wall doe
valentinak56 [21]

Answer:

the top of the ladder is 27.5ft above the ground.

Step-by-step explanation:

The ladder makes an angle, θ with the ground thus forming a right angle triangle with the wall of the house.

The length of the ladder represents the hypotenuse of the right angle triangle.

The ground distance from the base of the wall to the foot of the ladder represents the adjacent side of the right angle triangle.

Therefore, to determine how high up is the top of the ladder on the wall, x, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

28² = x² + 5²

784 = x² + 25

x² = 784 - 25 = 759

x = √759 = 27.5ft

4 0
3 years ago
Me ajudaa por favor, é urgente
Zigmanuir [339]

Answer: x=16 kg.

Step-by-step explanation:

\displaystyle\\x+x+\frac{1}{2}x=40\\\\ 2\frac{1}{2}x=40\\\\\frac{(2*2+1)}{2}x=40\\\\ \frac{5}{2}  x=40\\\\Multiply\  both\  sides\  of\  the\  equation\  by\  2:\\\\\frac{5}{2}x*2 =40*2\\\\5x=80\\\\Divide\  both\  sides\  of\  the\  equation\  by\  5:\\\\x=16\ kg.

6 0
2 years ago
Kevin is 3 years older than Daniel. Two years ago, Kevin was 4 times as old as Daniel. How old is Kevin now?
GuDViN [60]
Let k and d be the Kevin's age and the Daniel's age;
We have the equation:
k = 3 + d;
k - 2 = 4( d - 2 );
We have 3 + d -  2 = 4d - 8;
Then, d + 1 = 4d - 8;
9 = 3d;
d = 3.
Finally, k = 6 years.












6 0
3 years ago
Read 2 more answers
Turn 0.68 into a fraction in simplest form
sattari [20]
Since .68 is 68/100, you can simplify to 17/25. 
7 0
3 years ago
Read 2 more answers
How to you divded fractions
Harlamova29_29 [7]
<span><span>Leave the first fraction in the equation alone.</span><span>Turn the division sign into a multiplication sign.</span><span>Flip the second fraction over (find its reciprocal). </span><span>Multiply the numerators (top numbers) of the two fractions together. ... </span><span>Multiply the denominators (bottom numbers) of the two fractions together.
</span></span>
Hope this helps!
<span><span /></span>
8 0
4 years ago
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