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2 years ago

10

Which of the students found the correct value of their expression? Select all that are true. None of the students Student 2 Stud

ent 1 Student 3 I will give you TEN BIG POINTS PLZ HELP.

1 answer:

Mariulka [41]2 years ago

6 0

Answer:

Step-by-step explanation:

Student 2 and student 1

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2 years ago

Solving 8 problems per minute, Fast Finn can finish his test in time. He was however, working faster, solving 10 problems per mi

mrs_skeptik [129]

Answer:

Number of problems = 240

Step-by-step explanation:

Let x be the number of questions and t be the time.

Given:

Average rate = 8 problems per minute

Fast Finn rate = 10 problems per minute

Fast Finn taken time = t - 6

We need to find the number of problems on the test paper.

Solution:

Average rate to solve test paper.

$Average\ rate =\frac{Number\ of\ questions}{time}$

$8 =\frac{x}{t}$

$t =\frac{x}{8}$ --------------(1)

Fast Finn rate to solve the test paper.

$Average\ rate =\frac{Number\ of\ questions}{time}$

$10 =\frac{x}{t-6}$

Using cross multiplication rule.

$x=10(t-6)$

$x=10t-60$

substitute $t =\frac{x}{8}$ from equation 1.

$x=10(\frac{x}{8}) -60$

Rearrange the equation as:

$x - \frac{5}{4}x = -60$

$\frac{4x-5x}{4}=-60$

$-\frac{x}{4} = -60$

Using cross multiplication rule.

$x = 60\times 4$

x = 240 problems.

Therefore, 240 problems were on the test.

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3 years ago

1) Find the area of a triangle with a height of 9 cm and a base of 5 cm.

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Step-by-step explanation:

area of triangle=1/2 base×height

1/2,×5×9
45/2
22.5cm²

<h2>stay safe healthy and happy..</h2>

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