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3 years ago

What is the value of the expression 4 × (2a − 1) if a = 3?

Mathematics

1 answer:

dlinn [17]3 years ago

4 0

Answer:

Step-by-step explanation:

4 * (2a − 1)

Let a=3

4 * (2*3 − 1)

Simplify inside the parentheses first

4 * (6 − 1)

4 * (5)

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The ratio of black marker in a box to blue markers in a box is 3:5. If there are 10 more blue markers than black markers,how man

fiasKO [112]

Answer:

$Total = 40$

Step-by-step explanation:

Given

$Black:Blue = 3:5$

$Blue = 10 + Black$

Required

Determine the total number of markers

First, we need to determine the ratio of black to blue such that

$Blue = 10 + Black$

$Black:Blue = 3:5$

Multiply the ratio by 5

$Black:Blue = 3 * 5 : 5 * 5$

$Black:Blue = 15 : 25$

By direct comparison:

$Black = 15$

$Blue = 25$

The above shows that:

$Blue = Black + 10$

So:

$Total = Black + Blue$

$Total = 25 + 15$

$Total = 40$

7 0

3 years ago

Yooo please help asap!!! marking brainiest!!!

hodyreva [135]

Answer:

$- x {}^{2} - 10 = 34$

6 0

3 years ago

a pitcher of fruit punch holds 2 gallons.If 9 people share the entire pitcher equally ,how much punch does each person get ?

Arada [10]

Answer:

28 4/9oz.

Step-by-step explanation:

I'd convert this to ounces. A gallon is 128oz.

2x128=256

Now, divide by 9.

256/9≈28.44oz., or 28 4/9 oz.

5 0

3 years ago

Find the product of (x+3) (x+3)

MA_775_DIABLO [31]

Answer:

$x^{2} + 9x$

Step-by-step explanation:

(x+3)(x+3)

distribute the x to both three and x.

x * x + 3x * 3x

add like terms.

X^2 + 9x

7 0

3 years ago

Quadrilateral ABCD has vertices A(1, 0) B(5, 0) C (7, 2) D(3, 2). Use slope to prove that ABCD is a parallelogram.

iogann1982 [59]

<span>In here, we will use the slope formula in order to prove that ABCD is a parallelogram. The slope of AB must be equal to CD and the slope of BC must be equal to DA. Using the formula m = (y1-y2) / (x1-x2), we obtain the slope for AB = 0/4, BC = 1, CD = 0/4, DA = 1. We can say that ABCD is a parallelogram as it satisfies AB = CD, and BC = DA</span>

6 0

3 years ago