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3 years ago

Can you help me with number 4 pleaseeeeeee

Mathematics

1 answer:

chubhunter [2.5K]3 years ago

6 0

Answer:

r=15-8 r=7

Step-by-step explanation:

You know for sure that there are 15 sandbags. You know that 8 of those sandbags are blue. If 8/15 are blue, then the other 7 must be red.

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Triangle ABC is congruent to triangle DFE. Find x.

Archy [21]

ΔABC ≡ ΔDFE

⇒ line EF = BC

<u>Solve x:</u>

3x - 4 = 20

3x = 24

x = 8

Answer: x = 8

4 0

3 years ago

Factor this expression completely and then place the factors in the proper location on the grid. 36y2 - 1

Tema [17]

I'm assuming that y2 means y^2 or y squared. In that case, your factors will be (6y+1) and (6y-1).

7 0

3 years ago

Read 2 more answers

Can y’all help me please

nikdorinn [45]

Answer:

$4a^2b^2(ab^3-4a^3+3b)$

This is the answer,the option C

Step-by-step explanation:

8 0

3 years ago

What is the gcf to 36 k and 144km

leonid [27]

The GCF is 36 since 36 can go into 144 (:
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7 0

3 years ago

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Use the discriminant to find the number and type of solution for x^2+6x=-9

likoan [24]

Answer:

D = 0; one real root

Step-by-step explanation:

Discriminant Formula:

$\displaystyle \large{D = {b}^{2} - 4ac}$

First, arrange the expression or equation in ax^2+bx+c = 0.

$\displaystyle \large{ {x}^{2} + 6x = - 9}$

Add both sides by 9.

$\displaystyle \large{ {x}^{2} + 6x + 9 = - 9 + 9} \\ \displaystyle \large{ {x}^{2} + 6x + 9 = 0}$

Compare the coefficients so we can substitute in the formula.

$\displaystyle \large{a {x}^{2} + bx + c = {x}^{2} + 6x + 9 }$

a = 1
b = 6
c = 9

Substitute a = 1, b = 6 and c = 9 in the formula.

$\displaystyle \large{D = {6}^{2} - 4(1)(9)} \\ \displaystyle \large{D = 36 - 36} \\ \displaystyle \large{D = 0}$

Since D = 0, the type of solution is one real root.

6 0

3 years ago