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melisa1 [442]
3 years ago
7

Factor completely. x2 + 4x – 21 Enter your answer in the box.

Mathematics
2 answers:
Kruka [31]3 years ago
6 0

Answer:

Step-by-step explanation:

x² + 4x -21 = x² + 7x - 3x -3*7

= x*(x + 7) -3(x + 7)

=(x + 7)*(x-3)

GuDViN [60]3 years ago
4 0

Answer:

(x+7)(x-3)

Step-by-step explanation:

You can factor this trinomial into two binomials. 7 * -3 multiply together to form -21 and they add together to form 4.

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Use the bar diagram to model the situation. Then write and solve an equation.
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Answer:

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Step-by-step explanation:

5 0
3 years ago
PLEASE HELP ME!!!!! take a look at the question please
timurjin [86]

according to clue no. 1 the number is 760 > x > 740. so, it could be any number between 740 - 760.

according to the 2 & 3 clue we can conclude that thousandths and ones digit are even and thousandth digit is twice the ones digit.

so the ones digit could be, 2 & 4 and the thousandth digit could be 4 & 8.

according to the 4th clue we can say that the tenths digit is 1 and thousandths digit is 4 as, thousandth digit is the 2nd even number after ones digit and also, sum of tenths and thousandth digit is 5 so, 1 + 4 = 5.

so, through this we can conclude that,

• ones digit = 2 as ( thousandth is twice the ones = 2 × 2 = 4 )

• tenths digit = 1 ( as 1 + 4 = 5 )

• thousandths digit = 4 ( as 4 + 1 = 5 )

according to clue no. 5 product of hundredths and hundreds is 7 so, 7 × 1 = 7.

so, according to this we can conclude that hundreds digit is 7 because in the required number the hundreds digit is itself 7

• hundreds digit = 7

&

• hundredths digit is = 1

and also, tens digit is 5 because only ones and thousandths digit are even.

so, the required number is, 752.114

<em>hope </em><em>this</em><em> answer</em><em> helps</em><em> you</em><em> dear</em><em> </em><em>&</em><em> </em><em>may </em><em>u </em><em>have</em><em> a</em><em> great</em><em> day</em><em> </em><em>ahead!</em><em>.</em><em>.</em><em>.</em><em> </em><em>take </em><em>care</em><em>!</em>

5 0
3 years ago
An artists builds a sculpture out of metal and wood that weighs 14.9 kilograms.3/4 of this weight is metal,and the rest is wood.
Softa [21]

Given is a sculpture that is built up of metal and wood, and the weight of this sculpture is 14.9 kilograms.

It says that three-fourth of the total weight is metal and says to find the weight of wooden part.

We can find the weight of metal part and then subtract it from the total weight to calculate the answer.

Total weight = 14.9 kilograms.

Metal part = three-fourth of total weight = \frac{3}{4} *14.9=\frac{44.7}{4} =11.175 \;kilograms

Wooden part = 14.9 - 11.175 = 3.725 kilograms.

Hence, the wooden part is 3.725 kilograms.

7 0
3 years ago
Read 2 more answers
4. Which of the following is not a prime number? A. 19 B. 11 C. 5 D. 24
Anvisha [2.4K]

Answer:

D. 24

Step-by-step explanation:

A prime number is a number that only has 2 factors, which is 1 and itself. In other words, a prime number is only divisible by 1 and itself.

19 is a prime number, because it is only divisible by 1 and itself.

11 is also a prime number because it is only divisible by 1 and itself.

5 is also a prime number because it is only divisible by 1 and itself.

24 is not a prime number because it is divisible by 1 and itself, but it is also divisible by 2, 3, 4, 6, 8, and 12.

The answer is D.

5 0
4 years ago
Read 2 more answers
Joe's dad is ordering pizza for Joe and his friends. Joe says that he wants 5/8 of a
stepan [7]

Answer:

First we need to turn the values into decimals

2

Step-by-step explanation:

5/8 =  0.625

1/2 = 0.50

1/4 = 0.25

Now add the decimal values up which would be 0.625 + 0.50 + 0.25 = 1.375

You can't have 1.375 of a pizza so joe's dad is going to order at the minimum 2 pizzas so that everyone can have their desired amount

4 0
3 years ago
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