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3 years ago

6

Keisha is working on a math worksheet with 50 problems. she has completed 20 problems in 25 minutes. if she continues at the sam

e pace how long will it take her to complete the worksheet

1 answer:

Gnesinka [82]3 years ago

4 0

Answer:

About 42.5 or 42 1/2

Step-by-step explanation:

20 + 20= 40 + 10= 50

25 + 25= 30 + 12.5= 42.5

Srry if the explanation makes no sense I tried ;-;

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Different kinds of sewing machine

Trava [24]

Answer:

Types of Sewing Machines

Mechanical Treadle Sewing Machines.

Electronic Mechanical Sewing Machines.

Mini and Portable Machines.

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Embroidery Machines.

Quilting Machines.

Overlocking or Serger Machines.

8 0

3 years ago

Please help me I’m very confused

solmaris [256]

Answer:

74

Step-by-step explanation:

74 divided by 2 is 37. 37 minus 10 is 27

7 0

3 years ago

I need help with this pls :)

Elza [17]

Wht is tht ummmmm dvdhshsjehrjsjhrgrhshsj

3 0

3 years ago

Simplify by combining like terms: -4\left(2x-y\right)+y+5\left(x+y\right)−4(2−)++5(+) − 4 ( 2 x − y ) + y + 5 ( x + y ) ; use NO

netineya [11]

Answer:

<em>-3x+10y</em>

Step-by-step explanation:

Given the expression $-4\left(2x-y\right)+y+5\left(x+y\right)$ , we are to simplify by combining the like terms. On simplification we have;

$= -4\left(2x-y\right)+y+5\left(x+y\right)$

Open the parenthesis:

$= -4(2x)-4(-y)+y+5(x)+5(y)\\\\= -8x+4y+y+5x+5y$

Collect the like terms:

$= -8x+5x+4y+y+5y$

Sum up the resulting expression

$= -8x+5x+4y+y+5y\\= -3x+10y$

<em>Hence the required expression on simplification is -3x+10y</em>

5 0

3 years ago

what is (5.91 x 10^-3) - (8.7 x 10^10) written in a scientific notation? Please answer asap thank you :))

nata0808 [166]

Answer:

Please check the explanation.

Step-by-step explanation:

Given the expression

$\left(5.91\times \:10^{-3}\right)-\left(8.7\times \:10^{10}\right)$

$\mathrm{Remove\:parentheses}:\quad \left(a\right)=a$

$=5.91\times \:10^{-3}-8.7\times \:10^{10}$

as

$5.91\times \:10^{-3}$

$\mathrm{Apply\:exponent\:rule}:\quad \:a^{-b}=\frac{1}{a^b}$

$=5.91\times \frac{1}{10^3}$

$=\frac{5.91}{1000}$

$=0.00591$

similarly

$8.7\times \:10^{10}$

Convert element to a decimal form

$10^{10}=10000000000$

so

$=10000000000\times \:8.7$

$\mathrm{Multiply\:the\:numbers:}\:8.7\times \:10000000000=87000000000$

$=87000000000$

Thus, the expression becomes

$\left(5.91\times \:\:10^{-3}\right)-\left(8.7\times \:\:10^{10}\right)=5.91\times \:\:10^{-3}-8.7\times \:\:10^{10}$

$=0.00591-87000000000$

$=-86999999999.9941$

Hence,

<em>converting -86999999999.9941 in a scientific notation</em>

In order to make our job easier we will remove the sign "-" from number -86999999999.9941 (we will write "-" at the final solution). So after this step we have:

<em>−86999999999.9941 ⟶ 86999999999.9941</em>

<em></em>

In order to write number 86999999999.9941 in scientific notation, we need to move the decimal point from its current location (black dot) to the new position such as:

<em>8.6999999999.9941</em>

<em />

So, we need to move the decimal point 10 places to the right.

This means that the power of 10 will be positive 10.

Now we have that the

Number part = 8.69999999999941 and

Exponent part = 10

Thus, we conclude that:

−86999999999.9941 = − 8.69999999999941 × 10¹⁰

8 0

4 years ago