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2 years ago

What are the values of r and a1

Mathematics

2 answers:

Aloiza [94]2 years ago

6 0

Answer:

a1 = .45 and r = 8

Step-by-step explanation:

This is of the form

sum a1 r^ k-1

a1 = .45 and r = 8

Aleonysh [2.5K]2 years ago

4 0

The first one I think

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Three girls cut out decimal models of hundredths. Amber doesn't shade any of her models. Grace qualifies three fifths of a model

Varvara68 [4.7K]

Answer:

$Amber = 0$

$Grace = 0.60$

$Marsha =1.70$

Step-by-step explanation:

Given

<em>Decimal Grid = Hundredths</em>

$Amber = None$

$Grace = \frac{3}{5}th$

$Marsha = 1 + \frac{7}{10}th$

To solve for each:

We have:

For Amber:

$Amber = 0 * 100$

$Amber = 0$

For Grace:

$Grace = \frac{3}{5}th$

$Grace = \frac{3}{5} * 100$

$Grace = \frac{300}{5}$

$Grace = 60$

This means that Grace shaded 60 of the hundredth models.

Decimal shaded is:

$Grace = 60 * \frac{1}{100}$

$Grace =\frac{60}{100}$

$Grace = 0.60$

For Marsha:

$Marsha = 1 + \frac{7}{10}th$

$Marsha = \frac{10 + 7}{10}th$

$Marsha = \frac{17}{10}th$

$Marsha = 1.7th$

Multiply this by 100, to get the number of shaded

$Marsha = 1.7 * 100$

$Marsha = 170$

This means that Marsha shaded 170 of the hundredth models.

Decimal shaded is:

$Marsha = \frac{170}{100}$

$Marsha =1.70$

5 0

2 years ago

will award brainliest Which of these is the algebraic expression for "five more than the product of ten and some number?" (3 poi

hram777 [196]

C. 10x+5! Hope this helped you!

3 0

3 years ago

Sal is tiling his entryway. The floor plan is drawn on a unit grid. Each unit length represents 1 foot. Tile costs $1.45 per squ

const2013 [10]

Answer:

$63.08

Step-by-step explanation:

43.5 * 1.45 = 63.08

8 0

1 year ago

Help please i dont get it

Mandarinka [93]

Answer:

3.51

Step-by-step explanation:

yes

5 0

2 years ago

Read 2 more answers

Alloy, c, weighing 500 ounces and having 35% aluminum, is obtained from melting together x ounces of alloy, a, containing 25% al

boyakko [2]

From the given scenario in this item, we can say that the sum of x and y is 500. By the aluminum balance, the equation that we can formulate from this,
0.25x + 0.40y = (500)(0.35)
The system of linear equations that can best express the given is,
x + y = 500
0.25x + 0.40y = 175

3 0

3 years ago