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Snowcat [4.5K]
4 years ago
11

Help me lisee7 I need help with how to write the formula and how to solve it

Mathematics
1 answer:
Mamont248 [21]4 years ago
3 0
I think that 12 is negative
2x+30= 1/2(9x-12+8x-6)

2x+30= 1/2( 17x-18)
2x+30= 8.5x-9
Subtract 2x
30= 6.5x-9
Add 9
39= 6.5x
Divide by 6.5
X=6
So 2x+30
2(6)+30
= 42
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Darla can do a job in eight hours while Lonnie can do the same job in six hours. Both Darla and Lonnie work three hours on the j
photoshop1234 [79]

Answer:

Look below ⏬

Step-by-step explanation:

Darla 8h

Lonnie 6h

They both worked 3 hours now

subtract

8-3=5

6-3=3

Darla have 5 hours to finish

and...

Lonnie has 3 hours to finish

all together is 8 hours in all

8 0
4 years ago
Read 2 more answers
A number cube is rolled and a spinner is spun. Find the probability. The spinner has five sections. 3 sections have the letter B
aliya0001 [1]

https://www.steilacoom.k12.wa.us/cms/lib4/WA01001786/Centricity/Domain/490/Probability%20Notes%20Answers.pdf



this should have every thing on it hope it helps

8 0
3 years ago
Are rectangles ABCD and WXYZ congruent? Why or why not? Yes, all right angles were preserved. Yes, both rectangles have an area
Setler79 [48]

Answer:

D. No, there is not a rigid transformation or a combination of rigid transformations that will map ABCD to WXYZ.

Step-by-step explanation:

Two figures are congruent if their vertices can be mapped into one another by appropriate rigid transformation or combination of rigid transformations. Examples of the transformation are; reflection, dilation, rotation and translation.

Comparing the two figures, it would be observed that they are not congruent. Since there is not a rigid transformation or a combination of rigid transformations that will map ABCD to WXYZ.

3 0
3 years ago
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I need help with this question
pav-90 [236]

Answer:

Pearson Math Book nice.

Step-by-step explanation:

I think the 11 ounces because thats the accurate one and determine if its regular or rush. Hope that helps.

8 0
3 years ago
Verify the trigonometric identities
snow_lady [41]
1)

here, we do the left-hand-side

\bf [sin(x)+cos(x)]^2+[sin(x)-cos(x)]^2=2
\\\\\\\
[sin^2(x)+2sin(x)cos(x)+cos^2(x)]\\\\+~ [sin^2(x)-2sin(x)cos(x)+cos^2(x)]
\\\\\\
2sin^2(x)+2cos^2(x)\implies 2[sin^2(x)+cos^2(x)]\implies 2[1]\implies 2

2)

here we also do the left-hand-side

\bf \cfrac{2-cos^2(x)}{sin(x)}=csc(x)+sin(x)
\\\\\\
\cfrac{2-[1-sin^2(x)]}{sin(x)}\implies \cfrac{2-1+sin^2(x)}{sin(x)}\implies \cfrac{1+sin^2(x)}{sin(x)}
\\\\\\
\cfrac{1}{sin(x)}+\cfrac{sin^2(x)}{sin(x)}\implies csc(x)+sin(x)

3)

here, we do the right-hand-side

\bf \cfrac{cos(x)-sin^2(x)}{sin(x)+cos^2(x)}=\cfrac{csc(x)-tan(x)}{sec(x)+cot(x)}
\\\\\\
\cfrac{csc(x)-tan(x)}{sec(x)+cot(x)}\implies \cfrac{\frac{1}{sin(x)}-\frac{sin(x)}{cos(x)}}{\frac{1}{cos(x)}-\frac{cos(x)}{sin(x)}}\implies \cfrac{\frac{cos(x)-sin^2(x)}{sin(x)cos(x)}}{\frac{sin(x)+cos^2(x)}{sin(x)cos(x)}}
\\\\\\
\cfrac{cos(x)-sin^2(x)}{\underline{sin(x)cos(x)}}\cdot \cfrac{\underline{sin(x)cos(x)}}{sin(x)+cos^2(x)}\implies \cfrac{cos(x)-sin^2(x)}{sin(x)+cos^2(x)}
8 0
4 years ago
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