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3 years ago

Evaluate if X = 5 and Y = 10 5 + 7X - 3Y

Mathematics

1 answer:

svp [43]3 years ago

5 0

Answer:

Step-by-step explanation:

Plug in 5 for x, and 10 for y in the expression:

5 + 7(5) - 3(10)

Remember to follow PEMDAS. PEMDAS is the order of operation, and stands for:

Parenthesis

Exponent (& Roots)

Multiplication

Division

Addition

Subtraction

First, Multiply:

7 * 5 = 35

-3 * 10 = -30

5 + 35 - 30

Combine like terms:

(5 + 35) - 30

40 - 30 = 10

10 is your answer.

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Twice "a" increased by the cube of "a" equals b.

MrRa [10]

Answer:

$2a+a^3=b$

Step-by-step explanation:

Let's do it part by part:

<u>Twice "a":</u>

This means 2 times a, or 2*a

This means a cubed, so a to the power 3, or $a^3$

Also note "is" means "equal" and "of" means "multiplication.

Twice a increased by cube of a means both parts are summed so we have:

$2a+a^3=b$ \

This is the formula/equation

6 0

4 years ago

Read 2 more answers

Use any model you choose to find the quotient. 4 divided by 1/3

Ronch [10]

12

The question is basically doing 4 x 3, which is equivalent to 12 :)

4 0

4 years ago

please help with this.....

sladkih [1.3K]

Answer:

Step-by-step explanation:

you can find the diagonal of a rectangle if you have the width and the height

7 0

3 years ago

Graph the equation 2(y+3)<4x

myrzilka [38]

Answer:

y<2x-3

Step-by-step explanation:

2(y+3)<4x

2y+6<4x

-6 -6

2y<4x-6

÷2 ÷2

y<2x-3

5 0

3 years ago

An expression is given that has a value between 4.44.4 and 4.54.5, and where xx represents an integer. \sqrt{x}+\sqrt{x} x

musickatia [10]

Answer:

$x = 5$

Step-by-step explanation:

Given

$\sqrt x + \sqrt x = (4.4,4.5)$

Required

Find x

When the result is 4.4, we have:

$\sqrt x + \sqrt x = 4.4$

This gives:

$2\sqrt x = 4.4$

Divide both sides by 2

$\sqrt x = 2.2$

Square both sides

$x = 2.2^2$

$x = 4.84$

When the result is 4.5, we have:

$\sqrt x + \sqrt x = 4.5$

$2\sqrt x = 4.5\\$

Divide both sides by 2

$\sqrt x = 2.25$

Square both sides

$x = 2.25^2$

$x = 5.0625$

So, the value of x is between 4.84 and 5.0625

i.e.

$x = (4.84,5.0625)$

The only integer between the above interval is 5.

Hence:

$x = 5$

5 0

3 years ago