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4 years ago

Plzzz help 100+ points

Mathematics

2 answers:

o-na [289]4 years ago

4 0

Answer:

1) 95% is the minimum

Step-by-step explanation:

If 5 tests were taken, and 100 pts each, and he received 77/100 on all 5 tests, then his grade would be 385/500 being 77%. Add another 100 pts to the denominator (for the last test) and 95 to the numerator, equaling 480/600, or 80%.

denis-greek [22]4 years ago

4 0

Answer:) 95% is the minimumtep explanation:

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The perimeter of a rectangle is 102 cm. If the length is 15 cm less than twice the width , what are the dimensions?

lianna [129]

Let the length be $\ell$ and the width be $w$ . Now, write the length in terms of the width. "The length is 15 cm. less than twice the width" in the form of an equation is

$\ell = 2w - 15 cm.$

Let's plug that into the equation for the perimeter now. The perimeter of a rectangle is $2 \ell + 2w$ , so the equation for the perimeter of this rectangle is

$2 \ell + 2w = 102 cm.$

Plugging in the length in terms of width and solving for the width, we get

$2(2w - 15 cm.) + 2w = 102 cm.$
$6w - 30 cm. = 102 cm.$
$6w = 132 cm.$
$\bf w = 22 cm.$

To find the length, we just have to plug in the width into the equation we wrote for the length in terms of the width:

$\ell = 2w + 15 cm.$
$\ell = 2(22 cm.) - 15 cm.$
$\bf \ell = 29 cm.$

7 0

3 years ago

1/2(4x-2)-2/3(6x+9)_<4 solve the Inequality show work

Marianna [84]

I think x = -11/2

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6 0

3 years ago

A playground is located on a triangular piece of land. Two sides of the playground are 157 feet long and they meet at an angle o

jok3333 [9.3K]

Answer:

$5,671.84

Step-by-step explanation:

To find the third side, we can use the law of cosines:

c^2 = a^2 + b^2 - 2ab*cos(theta)

c^2 = 157^2 + 157^2 - 2*157*157*cos(65)

c^2 = 28463.7649

c = 168.71 feet

The perimeter of the playground is:

P = 157 + 157 + 168.71 = 482.71 feet

If each foot costs $11.75, the final cost is:

Cost = 482.71 * 11.75 = $5,671.84

8 0

3 years ago

you go to Frontier City with your parents, brother and sister. The cost for adults is $12.50, and the cost for children is $8.00

noname [10]

9514 1404 393

Answer:

cost for adults: 2×$12.50

cost for children: 3×$8.00

total cost: 2×$12.50 +3×$8.00

$49.00

Step-by-step explanation:

Assuming I, my brother, and my sister qualify for children's tickets, we have ...

cost for adults: 2×$12.50

cost for children: 3×$8.00

total cost: 2×$12.50 +3×$8.00

Evaluation:

$25.00 +24.00 = $49.00 . . . . . . . multiplication is performed first

3 0

3 years ago

The probability of a spinner landing on green is 1/4 . Lila spins the spinner 350 times .

kolezko [41]

Answer:

175

Step-by-step explanation:

It is simplified

6 0

3 years ago