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3 years ago

What two numbers add up to 10 and multiply to 21

Mathematics

1 answer:

WITCHER [35]3 years ago

3 0

Answer:The answer is 3 & 7

Step-by-step explanation:3 x 7 = 21

3 + (7) = 10

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x2 + 10x + 21 = 0

If so, the solution to factor the quadratic equation above is:

(X + 3 ) (X + 7)

To summarize, since 3 and 7 multiply to 21 and add up 10, you know that the following is true:

x2 + 10x + 21 = (X + 3 ) (X + 7)

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2 years ago

Carmen worked more than 40 hours last week and earned $352.95. Her regular hourly pay rate is $7.80. After 40 hours, she is paid

posledela

She worked 50.5 hours last week.

7.80x40=312

352.95-312=40.95

40.95/4.90=10.5

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3 years ago

Read 2 more answers

Please help me!<br> I have problem understanding.<br> Please give me workings

Ivanshal [37]

Answer:

A)7

B)14

C)20

D)18

Step-by-step explanation:

For example 2/5 of 80

2/5 x 80/1 =32 Cross cancel

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3 years ago

Which points define the solution set

Lemur [1.5K]

There is a line and a parabola in the graph.

So, we will get the solution set from the point of intersection of both line and parabola.

Notice that the parabola and the line intersecting at two points E(1, 5) and C(-0.5,2).

So, the solution set is E(1, 5) and C(-0.5,2).

8 0

3 years ago

What is the answer to this question in SSS, SAS, AA, or none

suter [353]

Answer:

Step-by-step explanation:

40/32 ?=? (40 + 12.5) / (32 + 10)

1.25 ?=? 52.5 / 42

1.25 = 1.25

similar via SAS

6 0

2 years ago