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lara [203]
3 years ago
8

HELP I NEED HELP ASAP

Mathematics
2 answers:
daser333 [38]3 years ago
6 0

Answer:

3x - 2(-x-5) =0

3x +2x +10 =0

5x +10 =0

5x=-10

divide both sides by 5

x = -2

to find the value of y subst.the value of x

y= -x -5

y= -(-2)-5

y=-3

AfilCa [17]3 years ago
4 0
Answer :
x = -1 and y = -4

Solution :

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dezoksy [38]
I think it would be A. 9.6. I'm completely sure on that one.
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3 years ago
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Could someone do all the problems and/or check my work?
MArishka [77]
11. You’ve done it correctly

12. Let x^2=y
y^2+13y+40=0
(y+8)(y+5)=0
y=8, 5
Since y=x^2
x^2=8 x^2=5
x=+/-√5 x= +/-2√2

13. x^4-x^2-x^2-8=0
x^4-2x^2-8=0
let x^2=y
Y^2-2y-8=0
(y-4)(y+2)=0
y=4, -2
Since y=x^2
X^2=4 X^2=-2
X= +/- 2 This wouldn’t be a real solution

14. It’s pretty much the same process, just substitute y in for x^2. If you’re confused feel free to ask and I can do it, or you can put it through Photomath

15. You’re on the right track so I’m just going to continue from where you left off
x^2(4x+5)-4(x+5)=0
(x^2-4)(4x+5)=0
x= +/- 2 4x=5
x=5/4 or 1 1/4

Hope this helped :)
8 0
3 years ago
Read 2 more answers
the length of square A is the same as the perimeter of square B. The area of square A is 75 cm. Estimate the length of square B.
Elena-2011 [213]

Answer:300cm

Step-by-step explanation:

3 0
2 years ago
ABCDE and FGHJE are similar pentagons. If the perimeter of FGHJE is 7.3, what is the perimeter of ABCDE?
kiruha [24]
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Can anyone help me understand this
bagirrra123 [75]

Answer:

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Step-by-step explanation:

For the triangles to be congruent, the hypotenuses must be the same length:

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and the marked leg must be the same length in each triangle:

y -3 = 4x -2

These are two equations in two unknowns (a "system" of equations) that can be solved in any of the usual ways. Since the first equation gives an expression for y, it is convenient to substitute that into the second equation:

(x +7) -3 = 4x -2

x +4 = 4x -2 . . . . . . collect terms

x +6 = 4x . . . . . . . . .add 2

6 = 3x . . . . . . . . . . . subtract x

2 = x . . . . . . . . . . . . divide by 3

y = 2 + 7 = 9 . . . . . .substitute for x in the first equation

The values you're looking for are x = 2, y = 9.

5 0
3 years ago
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