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3 years ago

Hi, I need some help with the last question of the first problem and the answer to the second page.

Mathematics

1 answer:

bulgar [2K]3 years ago

6 0

Answer:

46.9 for the first one

Step-by-step explanation:

So sorry if i'm wrong <3

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What is the ratio of these plz help

tatyana61 [14]

Step-by-step explanation:

1. Ratio(White to black) = 12 / [52 - 12]

Ratio(White to black) = 12 / [40]

Ratio(White to black) = 3 / 10 = 3:10

2. Ratio(Blue triangle to all) = 5 / [5+80]

Ratio(Blue triangle to all) = 5 / [85]

Ratio(Blue triangle to all) = 1 / 17 = 1:17

3. Ratio(Circle to all) = 76 / [22+76]

Ratio(Blue triangle to all) = 76 / [98]

Ratio(Blue triangle to all) = 38 / 49 = 38:49

4. Ratio(Yellow triangle to blue) = 18 / 14

Ratio(Yellow triangle to blue) = 9 / 7 = 9:7

5. Ratio(Yellow triangle to blue) = 42 / 6

Ratio(Yellow triangle to blue) = 7 / 1 = 7:1

6.Ratio(Boys to all) = 63 / [27 + 63]

Ratio(Boys to all) = 63 / 90

Ratio(Boys to all) = 7 / 9 = 7:9

6 0

3 years ago

2x^2+3x=(2x-1)(x+1) Pls do explain

Serggg [28]

<h3>Answer:</h3>

$x=-\frac{1}{2}$

<h3>Step-by-step explanation:</h3>

You could solve this problem by either: Factoring or by using the Quadratic Formula.

SOLVING BY FACTORING STEPS

STEP 1: Move (2x−1)(x+1) to the left side of the equation by subtracting it from both sides.

$2x^2+3x-(2x-1)(x+1)=0$

STEP 2: Simplify 2x^2+3x−(2x−1)(x+1).

$2x+1=0$

STEP 3: Simplify each term.

$2x^2+3x-2x^2-x+1=0$

STEP 4: Simplify by adding terms.

$2x+1=0$

STEP 5: Subtract 1 from both sides of the equation.

$2x=-1$

STEP 6: Divide each term by 2 and simplify.

$x=-\frac{1}{2}$

SOLVE BY USING THE QUADRATIC FORMULA STEPS

STEP 1: Move all terms to the left side of the equation and simplify.

$2x+1=0$

STEP 2: Subtract 1 from both sides of the equation.

$2x=-1$

STEP 3: Divide each term by 2 and simplify.

$x=-\frac{1}{2}$

5 0

3 years ago

Read 2 more answers

Write an expression that equals 24. Include an exponent

Svet_ta [14]

2^2 + 5(4) = 4 + 20 = 24

3 0

3 years ago

A student completes 2/5 of a science project in 3/4 hour. At this rate, what fraction of the project can the student complete pe

kvasek [131]

The fraction of the fence completed in one hour at a rate of $\frac{2}{5}$ of the

fence in $\frac{3}{4}$ hours is $\frac{8}{15}$ .

<h3>How can the fraction completed in one hour be found?</h3>

The fraction of the fence completed in $\mathbf{\frac{3}{4}}$ of an hour = $\frac{2}{5}$

Required:

The fraction of the fence the student completes per hour;

Solution;

The time $\mathbf{\frac{2}{5}}$ of the fence is completed = $\frac{3}{4}$ of an hour

Therefore;

$The \ in \ \mathbf{\frac{\dfrac{3}{4} \ hour}{\dfrac{3}{4} \ hour}} = 1 \ hour \ the \ frraction \ completed = \dfrac{\dfrac{2}{5} }{\dfrac{3}{4} \ hour} = \dfrac{8}{15} \ per \ hour$

The fraction of the fence completed per hour = $\underline{\frac{8}{15}}$

Learn more about fractions here:

brainly.com/question/21339546

4 0

3 years ago

Without shipping costs, a helmet costs $56.48 from a particular online dealer. If Jordan paid $61.11 for the helmet, including s

lubasha [3.4K]

Answer:

Step-by-step explanation

-56

4 0

2 years ago