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liq [111]
3 years ago
5

Solve for x. -3+6=2x-24

Mathematics
1 answer:
Svetlanka [38]3 years ago
7 0

Answer:

13.5=x

Step-by-step explanation:

-3+6=2x-24

3=2x-24

+24   +24

___________

27=2x

÷2   ÷2

___________-

13.5 = x

Hope this helps :D

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An engineer wants to make a 60% cement mixture. How many pounds of an 80% cement mixture must she mix with 14 pounds of a 50% mi
vladimir2022 [97]
In 14 pounds of a 50% mixture we have 0.5*14=7pounds of cement
lets think that we need x pounds of mix of an 80% cement so in that mix we will have 0.8x pounds of cement. If we'll mix both we wiil have (14+x)pounds of mix and  we have (0.8x+7) cement on it.

in mixture mix there are 60% of (x+14)pounds of cement so it is 0.6(x+14) of cement

make equation (sum of mix)
0.6(x+14)=0.8x+7
0.6x+8.4=0.8x+7
0.2x=1.4
x=7

Answer: engineer need 7pounds of 80% mix

P.s. look at the picture it more easy for understanding!

8 0
3 years ago
Find the curvature of the parabola y=x^2 at A(1,1)
xxMikexx [17]

Answer:

Step-by-step explanation:

The curvature of the curve y=f(x) is

y=f(x)=x^2\\\\y'=f'(x)=2x\\\\y''=f''(x)=2\\\\K(x)=courbure(in\  French)=\Bigg|\dfrac{y''(x)}{(1+y'(x)^2)^{\dfrac{3}{2} } }\Bigg|\\\\At\ A=(1,1),\\K(1)=\Bigg|\dfrac{2}{(1+2^2)^{\dfrac{3}{2} } }\Bigg|\\\\=\Bigg|\dfrac{2}{(5)^{\dfrac{3}{2} } }\Bigg|\\\\=\Bigg|\dfrac{2}{5*\sqrt{5} }\Bigg|\\\\=\Bigg|\dfrac{2*\sqrt{5}}{25 }\Bigg|\\\\\\\boxed{=\dfrac{2*\sqrt{5}}{25 }}\\\\

6 0
3 years ago
Leroy's total job benefits were $50,150 last year. His total job expenses for traveling and for professional development for the
kykrilka [37]

Answer:

D. $53,650

Hope this helps, sorry if it's wrong :)

7 0
3 years ago
Multiply.<br> (2x2 – 3x)(3x2 + 2x - 1)
exis [7]

Answer:

-6x^{2} –7x + 20

Step-by-step explanation:

(2x2 – 3x)(3x2 + 2x – 1)

(4 – 3x)(2x + 5)

(4*2x) + (4*5) + (–3x*2x) + (–3x*5)

8x + 20 -6x^{2} –15x

-6x^{2} –7x + 20

8 0
3 years ago
Volume correct answers only hurry please
Stells [14]

Answer: 108

lmk if this is wrong

Step-by-step explanation:

V=1/3bh

V=1/3(1/2bh)(h)

V=1/3(1/2)(9)(6)(12)

(i simplified)

V=(1)(1)(3)(6)(6)

V=108

5 0
3 years ago
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