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2 years ago

How can you solve problems involving equations that contain adding subtracting multiplication or division

Mathematics

1 answer:

kiruha [24]2 years ago

8 0

Use PEMDAS.
Compute in order of parentheses, exponents, multiplication, division, addition, subtraction.

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Give a real-life situation for the sum. (will mark brainiest!!)

iren [92.7K]

Answer:

Jeff is 15 years younger than Joe who is 10

Step-by-step explanation:

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1 year ago

Find the missing side length

Slav-nsk [51]

Answer:

x ≈ 4.8

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Trigonometry

[Right Triangles Only] SOHCAHTOA
[Right Triangles Only] cos∅ = adjacent over hypotenuse

Step-by-step explanation:

Step 1: Identify Variables

Angle measure = 58°

Adjacent side of angle = x

Hypotenuse = 9

Step 2: Solve for x

Substitute [cosine]: cos58° = x/9
Isolate x: 9cos58° = x
Evaluate: 4.76927 = x
Rewrite: x = 4.76927
Round: x ≈ 4.8

5 0

2 years ago

Read 2 more answers

Maura spent 1 1/2 hours on science homework. This was 2/3 of the total time she spent on homework. How much time did she spend o

Rudik [331]

It is about 2.25 hours

8 0

3 years ago

Gabriela walked to school on 16 of the 24 school days in March. Which value is equivalent to the fraction of the school days in

olchik [2.2K]

Answer:

$\frac{2}{3}$

Step-by-step explanation:

A fraction is a quantity that is not a whole number. In maths, a fraction usually has a numerator and a denominator.

The numerator is the number above. While the denominator is the number below

an example of a fraction = $\frac{4}{5}$

4 is the numerator while 5 is the denominator

In this question, the numerator would be the number of times she walked to school in march(16). While the denominator would be the number of school days in March

$\frac{16}{24}$

the above fraction is not in its simplest form. To express in its simplest form, divide both numerator and the denominator by 8 . this gives

$\frac{2}{3}$

5 0

2 years ago

Roberta has $10,540 to invest. She plans to invest her money in certificates of deposit (CDs) that have 2.1% interest, a stock p

ira [324]

Answer:

The amount invested in CDs is $1,340

The amount invested in the stock portafolio is $6,900

The amount invested in the saving accounts is $2,300

Step-by-step explanation:

Let

x ---->the amount invested in CDs at 2.1%

y ---> the amount invested in the stock portfolio at 2.5%

z ---> the amount invested in the savings account at 1.5%

$x+y+z=10,540$ ----> equation A

$z=\frac{1}{3}y$ ----> equation B

substitute equation B in equation A

$x+y+\frac{1}{3}y=10,540$

$x+\frac{4}{3}y=10,540$

$x=10,540-\frac{4}{3}y$ ----> equation C

we know that

The total interest earned by the three amount must be equal to $231.69

$0.021x+0.025y+0.015z=231.69$ ----> equation D

substitute equation B and equation C in equation D

$0.021(10,540-\frac{4}{3}y)+0.025y+0.015(\frac{1}{3}y)=231.69$

solve for y

$221.34-0.0315y+0.025y+0.005y=231.69$

$0.0015y=231.69-221.34$

$0.0015y=10.35$

$y=\$6,900$

Find the value of x

$x=10,540-\frac{4}{3}(6,900)$

$x=\$1,340$

Find the value of z

$z=\frac{1}{3}(6,900)$

$z=\$2,300$

7 0

3 years ago