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3 years ago

(-5 +x)(x+4)solve.

Mathematics

1 answer:

MakcuM [25]3 years ago

5 0

Answer:

Yes , the products of both expressions are the same

Step-by-step explanation:

Given

(-5 + x)( x + 4)

Using the distributive property we have

-5xx -5x4 + xxx +xx4

Negative times positive becomes negative

-5x - 20 + x^2 + 4x

Also (5 + x)(x - 4)

Using the distributive property

5xx +5-4 + xxx +xx-4

5x^2 -20 + x^2 - 4x

The product of -5 + x and x + 4 is equal to the product of 5 + x and x - 4

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In a class 30 of students, 19 play an instrument and 10 play a sport. There are 8

baherus [9]

Answer:

1/30

Step-by-step explanation: There are 30 students 19 play instr, 10 play spor,

8 who do both. Their is one student that was left out so the answer is 1/30

8 0

3 years ago

Use 425 x 79 = 33575 to work out 425 x 7.9

tester [92]

$Answer: \\ 425 \times 7.9 = 425 \times 79 \div 10 = 33575 \div 10 = 3357.5$

5 0

3 years ago

In triangle XYZ, angle Y = 45º and angle Z = 60º. If XZ = 4, then what is XY?

Katena32 [7]

Answer:

$XY = 4.9$

Step-by-step explanation:

Given

$XZ= 4$

$\angle Y = 45$

$\angle Z = 60$

Required

Determine the measure of side XY

To do this, we make use of sine law. This is as follows:

$\frac{a}{\sin\ A} = \frac{b}{\sin\ B} = \frac{c}{\sin\ C}$

In this case:

$\frac{4}{\sin(45)} = \frac{XY}{\sin(60)}$

Cross Multiply

$XY * \sin(45) = 4 * \sin(60)$

$XY * 0.7071 = 4 * 0.8660$

Make XY the subject

$XY = \frac{4 * 0.8660}{0.7071}$

$XY = \frac{3.4640}{0.7071}$

$XY = 4.89888276057$

$XY = 4.9$ -- <em>approximated</em>

3 0

3 years ago

Pls help me almost due

iVinArrow [24]

Answer: disagree its backwards

Step-by-step explanation: the x intercept always comes first so its actually (-4,2)

6 0

3 years ago

Read 2 more answers

In a newspaper, it was reported that the number of yearly robberies in Springfield in

ryzh [129]

Answer:

The number of robberies in 2014 is 108

Step-by-step explanation:

Here, we want to calculate the number of robberies in 2014

from the question, the robberies went down by 40%

Let the number of robberies in 2014 be x

Thus;

40/100 * 180

= 72

This means that the value it went down was by 72

Thus;

x = 180-72

x = 108

5 0

2 years ago