All categories

4 years ago

QUick i on test

Mathematics

2 answers:

Goshia [24]4 years ago

8 0

Answer:

A) 117/55

Step-by-step explanation:

bekas [8.4K]4 years ago

3 0

Answer:

The answer is A.

Step-by-step explanation:

First, you have to make mixed number into an improper fraction :

5 2/5 = (5×5)+2 / 5

= 27/5

4 1/8 = (4×8)+1 / 8

= 32+1 / 8

= 33/8

Next is to divide the fractions by multiplying an upside down fractions :

27/5 ÷ 33/8

= 27/5 × 8/33

= 9/5 × 8/11

= (9×8)/(5×11)

= 72/55

= 1 17/55

You might be interested in

I don't know what to do

cestrela7 [59]

56 is the answer cause you use 7*8=56 so i hope that helps

4 0

3 years ago

1/4 times the sum of a number and −3.2 is 1.8. What is the number?

joja [24]

Answer:

10.4

Step-by-step explanation:

Let the number be x

Sum of x and -3.2 : x + (-3.2) = x - 3.2

1/4 times the sum of a number and −3.2 = (1/4) * (x - 3.2)

$\dfrac{1}{4}* \left( x - 3.2 \right) = 1.8\\\\\Multiply \ the \ whole \ equation \ by \ 4 \\\\4*\dfrac{1}{4} *(x - 3.2) = 1.8*4\\\\\\x - 3.2 = 7.2\\\\Add \ 3.2 \ to \ both \ sides\\\\\\x = 7.2 + 3.2\\$

x = 10.4

5 0

3 years ago

Which of these number sentences is not true

andrew-mc [135]

4,ooo,ooo mm equal 4km

6 0

3 years ago

The scale of a map is 1 in : 40 mi. How many actual miles does 3 represent?

Alchen [17]

40+40+40= 120. If each inch is 40 then add 40 3 times

7 0

3 years ago

Which point would be a solution to the system of linear inequalities ?

brilliants [131]

Answer:

(12,-6)

Step-by-step explanation:

we have

$y\leq \frac{4}{3}x+5$ ----> inequality A

$y\geq -\frac{5}{2}x+5$ ---> inequality B

we know that

If a ordered pair is a solution of the system of inequalities, then the ordered pair must satisfy both inequalities (makes true both inequalities)

<u><em>Verify each point</em></u>

Substitute the value of x and the value of y of each ordered pair in the inequality A and in the inequality B

case 1) (0,-1)

Inequality A

$-1\leq \frac{4}{3}(0)+5$

$-1\leq5$ ----> is true

Inequality B

$-1\geq -\frac{5}{2}(0)+5$

$-1\geq 5$ ----> is not true

therefore

The ordered pair is not a solution of the system

case 2) (0,3)

Inequality A

$3\leq \frac{4}{3}(0)+5$

$3\leq5$ ----> is true

Inequality B

$3\geq -\frac{5}{2}(0)+5$

$3\geq 5$ ----> is not true

therefore

The ordered pair is not a solution of the system

case 3) (-6,-6)

Inequality A

$-6\leq \frac{4}{3}(-6)+5$

$-6\leq-3$ ----> is true

Inequality B

$-6\geq -\frac{5}{2}(-6)+5$

$-6\geq 20$ ----> is not true

therefore

The ordered pair is not a solution of the system

case 4) (12,-6)

Inequality A

$-6\leq \frac{4}{3}(12)+5$

$-6\leq21$ ----> is true

Inequality B

$-6\geq -\frac{5}{2}(12)+5$

$-6\geq -25$ ----> is true

therefore

The ordered pair is a solution of the system (makes true both inequalities)

8 0

3 years ago