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3 years ago

Will give brainlest answer if correct

Mathematics

1 answer:

NNADVOKAT [17]3 years ago

5 0

Answer:

-3.52

Step-by-step explanation:

-2.2 x (-2) / (- 1/4) x 5 PEMDAS

4.4 / -1.25

-3.52

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7 out of the 70 employees at the sports shop are part-time employees. What percentage of the employees at the sports shop work p

Ket [755]

Answer:

10%

Step-by-step explanation:

First, you convert it into a fraction, 7/70. Then convert the fraction into a decimal which is 0.1. Then multiple by 100, which gives you 10%

4 0

3 years ago

i-Ready Which kind of triangle is shown? equilateral triangle acute triangle right triangle obtuse triangle

AveGali [126]

Answer:

right triangle

Step-by-step explanation:

Notice it has a right angle (90º) in its corner. Therefore, it is a right triangle.

Right triangles look like this: ⊿

7 0

3 years ago

Students who attend Washington Middle School are either in seventh or eighth grade. At the end of the first semester 25% of the

Irina18 [472]

Answer:

There are 1240 students who attended Washington Middle School.

Step-by-step explanation:

Given:

Students who attend Washington Middle School are either in seventh or eighth grade.

At the end of the first semester 25% of the students at Washington Middle School were on the honor roll.

Seventh graders represented 60% of the students on the honor roll.

If 124 students on the honor roll were in eighth grade.

Now, to find the students attend Washington Middle School.

Let the total number of students be $x.$

So, the students at Washington Middle School were on the honor roll:

25% of $x$

$=\frac{25}{100} \times x$

$=\frac{25x}{100}$

$=\frac{x}{4}$

As, given seventh graders represented 60% of the students.

So, the students on the honor roll represented as seventh graders:

$60\%\ of\ \frac{x}{4}$

$=\frac{60}{100} \times \frac{x}{4}$

$=0.6\times \frac{x}{4}$

$=\frac{0.6x}{4}$

As, 124 students on the honor roll were in eighth graders.

Thus,

According to question:

$\frac{x}{4} -\frac{0.6x}{4} =124$

$\frac{x-0.6x}{4} =124$

$\frac{0.4x}{4} =124$

Multiplying both sides by 4 we get:

$0.4x=496$

Dividing both sides by 0.4 we get:

$x=1240.$

Therefore, there are 1240 students who attended Washington Middle School.

6 0

4 years ago

An irrational number between 5 and 7

Lorico [155]

By definition we have to:

In mathematics, an irrational number is a number that can not be expressed as a fraction m / n, where m and n are integers and n is different from zero.

For example, the number π is an irrational number.

$\pi = 3.141592654$

We must find an irrational number between 5 and 7.

We then have the following number:

$2\pi = 6.283185307$

Answer:

An irrational number between 5 and 7 is:

$2\pi = 6.283185307$

4 0

4 years ago

Read 2 more answers

Find a third-degree polynomial equation with the rational coefficients that has roots -3 and 1+i

jolli1 [7]

Answer:

x³ + x² − 4x + 6 = 0

Step-by-step explanation:

Imaginary roots come in conjugate pairs. So if 1+i is a root, then 1−i is also a root.

(x − (-3)) (x − (1+i) (x − (1−i)) = 0

(x + 3) (x² − (1+i) x − (1−i) x + (1+i) (1−i)) = 0

(x + 3) (x² − x − ix − x + ix + 1 − i²) = 0

(x + 3) (x² − 2x + 2) = 0

x (x² − 2x + 2) + 3 (x² − 2x + 2) = 0

x³ − 2x² + 2x + 3x² − 6x + 6 = 0

x³ + x² − 4x + 6 = 0

3 0

3 years ago