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2 years ago

8.9*10(-5) in scientific notation

Mathematics

1 answer:

Alexeev081 [22]2 years ago

5 0

4.45*10 to the second power

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Consider vectors u = ⟨2, 1⟩ and v = ⟨4, –1⟩ with the angle between them equal to 40°. What are the scalar projections uv and vu?

Crank

Answer: D. uv = 1.71 and vu = 3.16

Step-by-step explanation:

edge2020

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2 years ago

Read 2 more answers

A shirt that cost $5 is marked up 20% what is the markup

natulia [17]

Answer:

1 dollar

Step-by-step explanation:

20% = .20(percentage to decimal conversion)

.20 * 5 = 1 or 5 * .20 = 1 either way works

7 0

2 years ago

What is the correct first step to solve this system of equations by elimination?

storchak [24]

$\bold{\huge{\pink{\underline{ Solution }}}}$

$\bold{\underline{ Given }}$

We have given two linear equations that is 2x - 3y = -6 and x + 3y = 12 .

$\bold{\underline{ To \: Find }}$

We have to find the value of x and y by elimination method.

$\bold{\underline{ Let's \: Begin }}$

$\sf{ 2x - 3y = -6 ...eq(1)}$

$\sf{ x + 3y = 12 ...eq(2)}$

Multiply eq( 2 ) by 2 :-

$\sf{ 2( x + 3y = 12 )}$

$\sf{ 2x + 6y = 24 }$

Subtract eq(1) from eq(2) :-

$\sf{ 2x + 6y -( 2x - 3y) = 24 -(-6)}$

$\sf{ 2x + 6y - 2x + 3y = 24 + 6 }$

$\sf{ 9y = 30 }$

$\sf{ y = 30/9}$

$\sf{\red{ y = 10/3}}$

Now, Subsitute the value of y in eq( 1 ):-

$\sf{ 2x - 3(10/3) = -6 }$

$\sf{ 2x - 10 = -6 }$

$\sf{ 2x = -6 + 10}$

$\sf{ x = 4/2}$

$\sf{\red{ x = 2}}$

Hence, The value of x and y is 2 and 10/3

6 0

1 year ago

Diane made $286 for 13 hours of work,

lyudmila [28]

Answer:

8 hours

Step-by-step explanation:

286 divided by 13 is 22

so she's making 22 dollars an hour

22 times x = 176

x = 8

she would need to work 8 hours

4 0

2 years ago

Please help me with this questions

viktelen [127]

Answer:

See attached

Step-by-step explanation:

The answers added on the picture

8 0

2 years ago